Signal Integrity in QSFP-DD

OcNOS SP : System Management Guide : EDFA Configuration Guide : Signal Integrity in QSFP-DD

Overview

The Signal integrity in the context of Quad Small Form Factor Pluggable Double Density (QSFP-DD) refers to the maintenance of the quality of electrical signals transmitted and received by the QSFP-DD module. QSFP-DD is a high-speed, high-density interface used primarily in data center applications to interconnect switches, servers, and other networking equipment.

Maintaining signal integrity is crucial in high-speed data transmission because any degradation or distortion of the signals can lead to errors, reduced performance, or even complete failure of communication between devices. In the case of QSFP-DD, which supports data rates of up to 400 Gbps per port, ensuring signal integrity is particularly challenging due to the high data rates and the compact form factor of the module.

Feature Characteristics

The signal integrity involves addressing various factors such as impedance matching, jitter, noise, reflections, and equalization to ensure the accurate and reliable transmission of electrical signals in electronic systems.

Benefits

Optimizing signal integrity in QSFP-DD modules offers numerous benefits:

• Enhanced reliability

• High-speed data transmission

• Reduced latency

• Compatibility

• Longer reach

• Scalability

• Cost-efficiency

• Compliance assurance.

Configuration

To configure Signal Integrity (SI) parameters like Rx Pre-Cursor Equalization, Rx Post-Cursor Equalization, Tx Equalization, and Rx Amplitude on a QSFP-DD module, you usually interact with the management interface or CLI provided by the networking equipment hosting the module. This involves accessing the configuration settings specific to the QSFP-DD module within the device's interface.

Topology

In this topology, the Signal Integrity RTR1 to RTR2 interface configuration in QSFP-DD.

R1 Tx Equalization

For the Tx equalization configuration in R1 route, follow these steps:

1. To configure Tx equalization, execute the following command in the config mode.
R1(config)#qsfp-dd 11
R1(config-qsfp-dd)# tx-input eq-target 5

2. To congifure, execute the following command.
R1(config-qsfp-dd)#commit

Validation

To validate the Tx equalization configuration, use the following command.

OcNOS#show qsfp-dd 11 si status

Port Number : 11

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Tx Equalization | 1 | 5 | 5 |

| 2 | 5 | 5 |

| 3 | 5 | 5 |

| 4 | 5 | 5 |

| 5 | 5 | 5 |

| 6 | 5 | 5 |

| 7 | 5 | 5 |

| 8 | 5 | 5 |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 2 |

| 2 | None | 2 |

| 3 | None | 2 |

| 4 | None | 2 |

| 5 | None | 2 |

| 6 | None | 2 |

| 7 | None | 2 |

| 8 | None | 2 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

R2 Tx Equalization

For the Tx equalization configuration in R2 route, follow these steps:

1. To configure Tx equalization, execute the following command in the config mode.
R2(config)#qsfp-dd 11
R2(config-qsfp-dd)# tx-input eq-target 5

2. To congifure, execute the following command.
R2(config-qsfp-dd)#commit

Validation

To validate the Tx equalization configuration, use the following command.

OcNOS#show qsfp-dd 11 si status

Port Number : 11

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Tx Equalization | 1 | 5 | 5 |

| 2 | 5 | 5 |

| 3 | 5 | 5 |

| 4 | 5 | 5 |

| 5 | 5 | 5 |

| 6 | 5 | 5 |

| 7 | 5 | 5 |

| 8 | 5 | 5 |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 2 |

| 2 | None | 2 |

| 3 | None | 2 |

| 4 | None | 2 |

| 5 | None | 2 |

| 6 | None | 2 |

| 7 | None | 2 |

| 8 | None | 2 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Tx Equalization Unconfiguration

For the Tx equalization unconfiguration in R2 route, follow these steps:

1. To unconfigure Tx equalization, execute the following command in the config mode.
R2(config)#qsfp-dd 11
R2(config-qsfp-dd)# no tx-input eq-target 5

2. To uncongifure, execute the following command.
R2(config-qsfp-dd)#commit

Tx Equalization Unconfiguration Validation

To validate the Tx equalization unconfiguration, use the following command.

OcNOS#show qsfp-dd 11 si status

Port Number : 11

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Tx Equalization | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 2 |

| 2 | None | 2 |

| 3 | None | 2 |

| 4 | None | 2 |

| 5 | None | 2 |

| 6 | None | 2 |

| 7 | None | 2 |

| 8 | None | 2 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

To configure the Tx Equalization on any specific host lanes, do the following configuration.

R1 Tx Equalization

For the Tx equalization configuration on any specific host lanes, follow these steps:

1. To configure Tx equalization on any specific host lanes, execute the following command in the config mode.
R1(config)#qsfp-dd 11
R1(config-qsfp-dd)# host-lane 1
R1(config-qsfp-dd)# tx-input eq-target 7

2. To congifure, execute the following command.
R1(config-qsfp-dd)#commit

Validation

To validate the Tx equalization configuration, use the following command.

OcNOS#show qsfp-dd 11 si status

Port Number : 11

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Tx Equalization | 1 | 7 | 7 |

| 2 | 5 | 5 |

| 3 | 5 | 5 |

| 4 | 5 | 5 |

| 5 | 5 | 5 |

| 6 | 5 | 5 |

| 7 | 5 | 5 |

| 8 | 5 | 5 |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 2 |

| 2 | None | 2 |

| 3 | None | 2 |

| 4 | None | 2 |

| 5 | None | 2 |

| 6 | None | 2 |

| 7 | None | 2 |

| 8 | None | 2 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

R2 Tx Equalization

For the Tx equalization configuration in R2 route, follow these steps:

1. To configure Tx equalization, execute the following command in the config mode.
R2(config)#qsfp-dd 11
R2(config-qsfp-dd)# host-lane 1
R2(config-qsfp-dd)# tx-input eq-target 7

2. To congifure, execute the following command.
R2(config-qsfp-dd)#commit

Validation

To validate the Tx equalization configuration, use the following command.

OcNOS#show qsfp-dd 11 si status

Port Number : 11

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Tx Equalization | 1 | 7 | 7 |

| 2 | 5 | 5 |

| 3 | 5 | 5 |

| 4 | 5 | 5 |

| 5 | 5 | 5 |

| 6 | 5 | 5 |

| 7 | 5 | 5 |

| 8 | 5 | 5 |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 2 |

| 2 | None | 2 |

| 3 | None | 2 |

| 4 | None | 2 |

| 5 | None | 2 |

| 6 | None | 2 |

| 7 | None | 2 |

| 8 | None | 2 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Tx Equalization Unconfiguration

For the Tx equalization unconfiguration on any specific host lanes, follow these steps:

1. To unconfigure Tx equalization on any specific host lanes, execute the following command in the config mode.
R1(config)#qsfp-dd 11
R1(config-qsfp-dd)# host-lane 1
R1(config-qsfp-dd)# no tx-input eq-target 7

2. To uncongifure, execute the following command.
R1(config-qsfp-dd)#commit

Tx Equalization Unconfiguration Validation

To validate the Tx equalization unconfiguration, use the following command.

OcNOS#show qsfp-dd 11 si status

Port Number : 11

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Tx Equalization | 1 | 5 | 5 |

| 2 | 5 | 5 |

| 3 | 5 | 5 |

| 4 | 5 | 5 |

| 5 | 5 | 5 |

| 6 | 5 | 5 |

| 7 | 5 | 5 |

| 8 | 5 | 5 |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 2 |

| 2 | None | 2 |

| 3 | None | 2 |

| 4 | None | 2 |

| 5 | None | 2 |

| 6 | None | 2 |

| 7 | None | 2 |

| 8 | None | 2 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

R1 Rx Amplitude

Use this command to configure the Rx Amplitude on the QSFP-DD module on all eight host lanes, follow these steps.

1. To configure Rx amplitude, execute the following command in the config mode:
R1(config)#qsfp-dd 11
R1(config-qsfp-dd)# rx-output amp-target 2

2. To congifure, execute the following command.
R1(config-qsfp-dd)#commit

Validation

To validate the Rx amplitude configuration, use the following command.

OcNOS#show qsfp-dd 11 si status

Port Number : 11

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Tx Equalization | 1 | 7 | 7 |

| 2 | 5 | 5 |

| 3 | 5 | 5 |

| 4 | 5 | 5 |

| 5 | 5 | 5 |

| 6 | 5 | 5 |

| 7 | 5 | 5 |

| 8 | 5 | 5 |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | 2 | 2 |

| 2 | 2 | 2 |

| 3 | 2 | 2 |

| 4 | 2 | 2 |

| 5 | 2 | 2 |

| 6 | 2 | 2 |

| 7 | 2 | 2 |

| 8 | 2 | 2 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

OcNOS#

R2 Rx Amplitude

Use this command to configure the Rx Amplitude on the QSFP-DD module on all eight host lanes, follow these steps.

1. To configure Rx amplitude, execute the following command in the config mode.
R2(config)#qsfp-dd 11
R2(config-qsfp-dd)# rx-output amp-target 2

2. To congifure, execute the following command.
R2(config-qsfp-dd)#commit

Validation

To validate the Rx amplitude configuration, use the following command.

OcNOS#show qsfp-dd 11 si status

Port Number : 11

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Tx Equalization | 1 | 7 | 7 |

| 2 | 5 | 5 |

| 3 | 5 | 5 |

| 4 | 5 | 5 |

| 5 | 5 | 5 |

| 6 | 5 | 5 |

| 7 | 5 | 5 |

| 8 | 5 | 5 |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | 2 | 2 |

| 2 | 2 | 2 |

| 3 | 2 | 2 |

| 4 | 2 | 2 |

| 5 | 2 | 2 |

| 6 | 2 | 2 |

| 7 | 2 | 2 |

| 8 | 2 | 2 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

OcNOS#

Rx Amplitude Unconfiguration

For the Rx amplitude unconfiguration, follow these steps.

1. To unconfigure Rx amplitude, execute the following command in the config mode.
R2(config)#qsfp-dd 11
R2(config-qsfp-dd)# no rx-output amp-target 2

2. To congifure, execute the following command.
R2(config-qsfp-dd)#commit

Rx Amplitude Unconfiguration Validation

To validate the Rx amplitude unconfiguration, use the following command.

OcNOS#sh qsfp-dd 11 advertisement si

Port Number : 11

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Tx Equalization | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | None | 6 |

| 2 | None | 6 |

| 3 | None | 6 |

| 4 | None | 6 |

| 5 | None | 6 |

| 6 | None | 6 |

| 7 | None | 6 |

| 8 | None | 6 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 3 |

| 2 | None | 3 |

| 3 | None | 3 |

| 4 | None | 3 |

| 5 | None | 3 |

| 6 | None | 3 |

| 7 | None | 3 |

| 8 | None | 3 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

To configure the Rx Amplitude on any specific host lanes, do the following configuration.

R1 Rx Amplitude

Use this command to configure the Rx Amplitude on the QSFP-DD module on any specific host lanes, follow these steps.

1. To configure Rx amplitude, execute the following command in the config mode.
R1(config)#qsfp-dd 11
R1(config-qsfp-dd)# host-lane 1
R1(config-qsfp-dd-host)# rx-output amp-target 3

2. To congifure, execute the following command.
R1(config-qsfp-dd)#commit

Validation

To validate the Rx amplitude configuration, use the following command.

OcNOS#show qsfp-dd 11 si status

Port Number : 11

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Tx Equalization | 1 | 7 | 7 |

| 2 | 5 | 5 |

| 3 | 5 | 5 |

| 4 | 5 | 5 |

| 5 | 5 | 5 |

| 6 | 5 | 5 |

| 7 | 5 | 5 |

| 8 | 5 | 5 |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | 3 | 3 |

| 2 | 2 | 2 |

| 3 | 2 | 2 |

| 4 | 2 | 2 |

| 5 | 2 | 2 |

| 6 | 2 | 2 |

| 7 | 2 | 2 |

| 8 | 2 | 2 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

R2 Rx Amplitude

Use this command to configure the Rx Amplitude on the QSFP-DD module on all eight host lanes, follow these steps.

1. To configure Rx amplitude, execute the following command in the config mode.
R2(config)#qsfp-dd 11
R2(config-qsfp-dd)# host-lane 1
R2(config-qsfp-dd-host)# rx-output amp-target 3

2. To congifure, execute the following command.
R2(config-qsfp-dd)#commit

Validation

To validate the Rx amplitude configuration, use the following command.

OcNOS#show qsfp-dd 11 si status

Port Number : 11

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Tx Equalization | 1 | 7 | 7 |

| 2 | 5 | 5 |

| 3 | 5 | 5 |

| 4 | 5 | 5 |

| 5 | 5 | 5 |

| 6 | 5 | 5 |

| 7 | 5 | 5 |

| 8 | 5 | 5 |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | 3 | 3 |

| 2 | 2 | 2 |

| 3 | 2 | 2 |

| 4 | 2 | 2 |

| 5 | 2 | 2 |

| 6 | 2 | 2 |

| 7 | 2 | 2 |

| 8 | 2 | 2 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx Amplitude Unconfiguration

For the Rx amplitude unconfiguration, follow these steps.

1. To unconfigure Rx amplitude, execute the following command in the config mode.
R2(config)#qsfp-dd 11
R2(config-qsfp-dd)# host-lane 1
R2(config-qsfp-dd)# no rx-output amp-target 3

2. To congifure, execute the following command.
R2(config-qsfp-dd)#commit

Rx Amplitude Unconfiguration Validation

To validate the Rx amplitude unconfiguration, use the following command.

OcNOS#sh qsfp-dd 11 advertisement si

Port Number : 11

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Tx Equalization | 1 | 7 | 7 |

| 2 | 5 | 5 |

| 3 | 5 | 5 |

| 4 | 5 | 5 |

| 5 | 5 | 5 |

| 6 | 5 | 5 |

| 7 | 5 | 5 |

| 8 | 5 | 5 |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | 2 | 2 |

| 2 | 2 | 2 |

| 3 | 2 | 2 |

| 4 | 2 | 2 |

| 5 | 2 | 2 |

| 6 | 2 | 2 |

| 7 | 2 | 2 |

| 8 | 2 | 2 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

R1 Rx Pre-Cursor Eq

Use this command to configure the Rx Pre-Cursor Eq on the QSFP-DD module on all eight host lanes, follow these steps.

1. To configure Rx Pre-Cursor Eq, execute the following command in the config mode.
R1(config)#qsfp-dd 0
R1(config-qsfp-dd)# rx-output eq-pre-cursor-target 4

2. To congifure, execute the following command.
R1(config-qsfp-dd)#commit

Validation

To validate the Rx Pre-Cursor Eq configuration, use the following command.

OcNOS#show qsfp-dd 0 si status

Port Number : 0

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | 4 | 4 |

| 2 | 4 | 4 |

| 3 | 4 | 4 |

| 4 | 4 | 4 |

| 5 | 4 | 4 |

| 6 | 4 | 4 |

| 7 | 4 | 4 |

| 8 | 4 | 4 |

--------------------------------------------------------

Rx Post-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

R2 Rx Pre-Cursor Eq

Use this command to configure the Rx Pre-Cursor Eq on the QSFP-DD module on all eight host lanes, follow these steps.

1. To configure Rx Pre-Cursor Eq, execute the following command in the config mode.
R2(config)#qsfp-dd 0
R2(config-qsfp-dd)# rx-output eq-pre-cursor-target 4

2. To congifure, execute the following command.
R2(config-qsfp-dd)#commit

Validation

To validate the Rx Pre-Cursor Eq configuration, use the following command.

OcNOS#show qsfp-dd 0 si status

Port Number : 0

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | 4 | 4 |

| 2 | 4 | 4 |

| 3 | 4 | 4 |

| 4 | 4 | 4 |

| 5 | 4 | 4 |

| 6 | 4 | 4 |

| 7 | 4 | 4 |

| 8 | 4 | 4 |

--------------------------------------------------------

Rx Post-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

OcNOS#

Rx Pre-Cursor Eq Unconfiguration

Use this command to unconfigure the Rx Pre-Cursor Eq on the QSFP-DD module on all eight host lanes, follow these steps.

1. To unconfigure Rx Pre-Cursor Eq, execute the following command in the config mode.
R1(config)#qsfp-dd 0
R1(config-qsfp-dd)# no rx-output eq-pre-cursor-target 4

2. To uncongifure, execute the following command.
R1(config-qsfp-dd)#commit

Rx Pre-Cursor Eq Unconfiguration Validation

To validate the Rx Pre-Cursor Eq Unconfiguration, use the following command.

OcNOS#sh qsfp-dd 11 si status

Port Number : 11

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Post-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

To configure the Rx Pre-Cursor Eq on any specific host lanes, do the following configuration.

R1 Rx Pre-Cursor Eq

Use this command to configure the Rx Pre-Cursor Eq on the QSFP-DD module on any specific host lanes, follow these steps.

1. To configure Rx Pre-Cursor Eq, execute the following command in the config mode.
R1(config)#qsfp-dd 0
R1(config-qsfp-dd)# host-lane 1
R1(config-qsfp-dd-host)# rx-output eq-pre-cursor-target 3

2. To congifure, execute the following command.
R1(config-qsfp-dd)#commit

Validation

To validate the Rx Pre-Cursor Eq configuration, use the following command.

OcNOS#show qsfp-dd 0 si status

Port Number : 0

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | 3 | 3 |

| 2 | 4 | 4 |

| 3 | 4 | 4 |

| 4 | 4 | 4 |

| 5 | 4 | 4 |

| 6 | 4 | 4 |

| 7 | 4 | 4 |

| 8 | 4 | 4 |

--------------------------------------------------------

Rx Post-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

R2 Rx Pre-Cursor Eq

Use this command to configure the Rx Pre-Cursor Eq on the QSFP-DD module on any specific host lanes, follow these steps.

1. To configure Rx Pre-Cursor Eq, execute the following command in the config mode.
R2(config)#qsfp-dd 0
R2(config-qsfp-dd)# host-lane 1
R2(config-qsfp-dd-host)# rx-output eq-pre-cursor-target 3

2. To congifure, execute the following command.
R2(config-qsfp-dd)#commit

Validation

To validate the Rx Pre-Cursor Eq configuration, use the following command.

OcNOS#show qsfp-dd 0 si status

Port Number : 0

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | 3 | 3 |

| 2 | 4 | 4 |

| 3 | 4 | 4 |

| 4 | 4 | 4 |

| 5 | 4 | 4 |

| 6 | 4 | 4 |

| 7 | 4 | 4 |

| 8 | 4 | 4 |

--------------------------------------------------------

Rx Post-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx Pre-Cursor Eq Unconfiguration

Use this command to unconfigure the Rx Pre-Cursor Eq on the QSFP-DD module on any specific host lanes, follow these steps.

1. To unconfigure Rx Pre-Cursor Eq, execute the following command in the config mode.
R1(config)#qsfp-dd 0
R1(config-qsfp-dd)# host-lane 1
R1(config-qsfp-dd-host)# no rx-output eq-pre-cursor-target 3

2. To unconfigure, execute the following command.
R1(config-qsfp-dd)#commit

Rx Pre-Cursor Eq Validation

To validate the Rx Pre-Cursor Eq unconfigure, use the following command.

OcNOS#show qsfp-dd 0 si status

Port Number : 0

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | 4 | 4 |

| 2 | 4 | 4 |

| 3 | 4 | 4 |

| 4 | 4 | 4 |

| 5 | 4 | 4 |

| 6 | 4 | 4 |

| 7 | 4 | 4 |

| 8 | 4 | 4 |

--------------------------------------------------------

Rx Post-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

R1 Rx Post-Cursor Eq

Use this command to configure the Rx Post-Cursor Eq on the QSFP-DD module on all eight host lanes, follow these steps.

1. To configure Rx Post-Cursor Eq, execute the following command in the config mode.
R1(config)#qsfp-dd 0
R1(config-qsfp-dd)# rx-output eq-pre-cursor-target 4

2. To congifure, execute the following command.
R1(config-qsfp-dd)#commit

Validation

To validate the Rx Post-Cursor Eq configuration, use the following command.

OcNOS#show qsfp-dd 0 si status

Port Number : 0

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | 3 | 3 |

| 2 | 4 | 4 |

| 3 | 4 | 4 |

| 4 | 4 | 4 |

| 5 | 4 | 4 |

| 6 | 4 | 4 |

| 7 | 4 | 4 |

| 8 | 4 | 4 |

--------------------------------------------------------

Rx Post-Cursor Eq | 1 | 4 | 4 |

| 2 | 4 | 4 |

| 3 | 4 | 4 |

| 4 | 4 | 4 |

| 5 | 4 | 4 |

| 6 | 4 | 4 |

| 7 | 4 | 4 |

| 8 | 4 | 4 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

R2 Rx Post-Cursor Eq

Use this command to configure the Rx Post-Cursor Eq on the QSFP-DD module on all eight host lanes, follow these steps.

1. To configure Rx Post-Cursor Eq, execute the following command in the config mode.
R2(config)#qsfp-dd 0
R2(config-qsfp-dd)# rx-output eq-pre-cursor-target 4

2. To congifure, execute the following command.
R2(config-qsfp-dd)#commit

Validation

To validate the Rx Post-Cursor Eq configuration, use the following command.

OcNOS#show qsfp-dd 0 si status

Port Number : 0

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | 3 | 3 |

| 2 | 4 | 4 |

| 3 | 4 | 4 |

| 4 | 4 | 4 |

| 5 | 4 | 4 |

| 6 | 4 | 4 |

| 7 | 4 | 4 |

| 8 | 4 | 4 |

--------------------------------------------------------

Rx Post-Cursor Eq | 1 | 4 | 4 |

| 2 | 4 | 4 |

| 3 | 4 | 4 |

| 4 | 4 | 4 |

| 5 | 4 | 4 |

| 6 | 4 | 4 |

| 7 | 4 | 4 |

| 8 | 4 | 4 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

R1 Rx Post-Cursor Eq Unconfiguration

Use this command to unconfigure the Rx Post-Cursor Eq on the QSFP-DD module on all eight host lanes, follow these steps.

1. To unconfigure Rx Post-Cursor Eq, execute the following command in the config mode.
R1(config)#qsfp-dd 0
R1(config-qsfp-dd)# rx-output eq-pre-cursor-target 4

2. To unconfigure, execute the following command.
R1(config-qsfp-dd)#commit

R1 Rx Post-Cursor Eq Unconfiguration Validation

To validate the Rx Post-Cursor Eq unconfigure, use the following command.

OcNOS#show qsfp-dd 0 advertisement si

Port Number : 0

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Post-Cursor Eq | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

OcNOS#

To configure the Rx Post-Cursor Eq on any specific host lanes, do the following configuration.

R1 Rx Post-Cursor Eq

Use this command to configure the Rx Post-Cursor Eq on the QSFP-DD module on any specific host lanes, follow these steps.

1. To configure Rx Post-Cursor Eq, execute the following command in the config mode.
R1(config)#qsfp-dd 0
R1(config-qsfp-dd)# host-lane 1
R1(config-qsfp-dd-host)# rx-output eq-pre-cursor-target 3

2. To congifure, execute the following command.
R1(config-qsfp-dd)#commit

Validation

To validate the Rx Post-Cursor Eq configuration, use the following command.

OcNOS#show qsfp-dd 0 si status

Port Number : 0

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | 3 | 3 |

| 2 | 4 | 4 |

| 3 | 4 | 4 |

| 4 | 4 | 4 |

| 5 | 4 | 4 |

| 6 | 4 | 4 |

| 7 | 4 | 4 |

| 8 | 4 | 4 |

--------------------------------------------------------

Rx Post-Cursor Eq | 1 | 3 | 3 |

| 2 | 4 | 4 |

| 3 | 4 | 4 |

| 4 | 4 | 4 |

| 5 | 4 | 4 |

| 6 | 4 | 4 |

| 7 | 4 | 4 |

| 8 | 4 | 4 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

R2 Rx Post-Cursor Eq

Use this command to configure the Rx Post-Cursor Eq on the QSFP-DD module on any specific host lanes, follow these steps.

1. To configure Rx Post-Cursor Eq, execute the following command in the config mode.
R2(config)#qsfp-dd 0
R2(config-qsfp-dd)# host-lane 1
R2(config-qsfp-dd-host)# rx-output eq-post-cursor-target 3

2. To congifure, execute the following command.
R2(config-qsfp-dd)#commit

Validation

To validate the Rx Post-Cursor Eq configuration, use the following command.

OcNOS#show qsfp-dd 0 si status

Port Number : 0

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | 3 | 3 |

| 2 | 4 | 4 |

| 3 | 4 | 4 |

| 4 | 4 | 4 |

| 5 | 4 | 4 |

| 6 | 4 | 4 |

| 7 | 4 | 4 |

| 8 | 4 | 4 |

--------------------------------------------------------

Rx Post-Cursor Eq | 1 | 3 | 3 |

| 2 | 4 | 4 |

| 3 | 4 | 4 |

| 4 | 4 | 4 |

| 5 | 4 | 4 |

| 6 | 4 | 4 |

| 7 | 4 | 4 |

| 8 | 4 | 4 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

R1 Rx Post-Cursor Eq Unconfiguration

Use this command to unconfigure the Rx Post-Cursor Eq on the QSFP-DD module on any specific host lanes, follow these steps.

1. To unconfigure Rx Post-Cursor Eq, execute the following command in the config mode.
R1(config)#qsfp-dd 0
R1(config-qsfp-dd)# host-lane 1
R1(config-qsfp-dd-host)# rx-output eq-pre-cursor-target 3

2. To unconfigure, execute the following command.
R1(config-qsfp-dd)#commit

R1 Rx Post-Cursor Eq Unconfiguration Validation

To validate the Rx Post-Cursor Eq unconfiguration, use the following command.

OcNOS#show qsfp-dd 0 advertisement si

Port Number : 0

--------------------------------------------------------

Parameter | Lane | User Config | H/W Config |

--------------------------------------------------------

Rx Pre-Cursor Eq | 1 | 3 | 3 |

| 2 | 4 | 4 |

| 3 | 4 | 4 |

| 4 | 4 | 4 |

| 5 | 4 | 4 |

| 6 | 4 | 4 |

| 7 | 4 | 4 |

| 8 | 4 | 4 |

--------------------------------------------------------

Rx Post-Cursor Eq | 1 | 4 | 4 |

| 2 | 4 | 4 |

| 3 | 4 | 4 |

| 4 | 4 | 4 |

| 5 | 4 | 4 |

| 6 | 4 | 4 |

| 7 | 4 | 4 |

| 8 | 4 | 4 |

--------------------------------------------------------

Rx Amplitude | 1 | None | 0 |

| 2 | None | 0 |

| 3 | None | 0 |

| 4 | None | 0 |

| 5 | None | 0 |

| 6 | None | 0 |

| 7 | None | 0 |

| 8 | None | 0 |

--------------------------------------------------------

Tx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Rx CDR Bypass | 1 | None | Disabled |

| 2 | None | Disabled |

| 3 | None | Disabled |

| 4 | None | Disabled |

| 5 | None | Disabled |

| 6 | None | Disabled |

| 7 | None | Disabled |

| 8 | None | Disabled |

--------------------------------------------------------

Glossary

The following provides definitions for key terms or abbreviations and their meanings used throughout this document:


Key Terms/Acronym	Description
QSFP-DD	QSFP-DD stands for Quad Small Form Factor Pluggable Double Density. QSFP-DD modules provide a scalable, high-bandwidth solution for data center networking, enabling efficient data transmission and network performance in modern computing environments.
SI	Signal integrity in networking refers to the reliability and fidelity of electrical signals as they propagate through various components of a network infrastructure.