OcNOS-DC : Layer 2 Guide : Data Center Bridging Configuration Guide : Priority-based Flow Control Configuration
Priority-based Flow Control Configuration
This chapter shows how to:
Enable PFC on a bridge and interface
Configure priorities and link delay allowance for PFC
Topology
PFC Enabled Bridge
Configuring a Bridge and Interface for PFC
 
#configure terminal
Enter configure mode
(config)#bridge 1 protocol ieee vlan-bridge
Create bridge 1 as an IEEE VLAN-enabled bridge
(config)#data-center-bridging enable bridge 1
Enables DCB on the bridge
(config)#priority-flow-control enable bridge 1
Enables PFC on the bridge
(config)#interface eth1
Configure interface eth1
(config-if)#switchport
Configure eth1 as a layer 2 port
(config-if)#bridge-group 1
Configure eth1 in bridge group 1
(config-if)#lldp-agent
Enter into LLDP agent mode.
(lldp-agent)#set lldp enable txrx
Configure LLDP for transmit and receive mode on eth1
(lldp-agent)#lldp tlv ieee-8021-org-specific data-center-bridging select
Configure LLDP to send an IEEE 802.1 organizationally specific TLV set in the packet
(lldp-agent)#exit
Exit from LLDP mode.
(config-if)#priority-flow-control mode on
Configure the advertise flag and start sending DCBX TLVs in LLDP messages
Configuring Priorities and Link Delay Allowance for PFC
 
#configure terminal
Enter Configure Mode.
(config)#bridge 1 protocol ieee vlan-bridge
Create bridge 1 as an IEEE VLAN-enabled bridge
(config)#data-center-bridging enable bridge 1
Enables DCB on the bridge
(config)#priority-flow-control enable bridge 1
Enables PFC on the bridge
(config)#interface eth1
Configure interface eth1
(config-if)#switchport
Configure eth1 as a layer 2 port
(config-if)#bridge-group 1
Configure eth1 in bridge group 1
(config-if)#lldp-agent
Enter into LLDP agent mode.
(lldp-agent)#set lldp enable txrx
Configure LLDP for transmit and receive mode on eth1
(lldp-agent)#llldp tlv ieee-8021-org-specific data-center-bridging select
Configure LLDP to send an IEEE 802.1 organizationally specific TLV set in the packet
(lldp-agent)#exit
Exit from LLDP mode.
(config-if)#priority-flow-control mode on
Configure the advertise flag and start sending DCBX TLVs in LLDP messages
(config-if)#priority-flow-control cap 4
Configure the maximum number of PFC priorities
(config-if)#priority-flow-control enable priority 2 4 5
Enable PFC on priorities 2, 4, and 5
(config-if)#priority-flow-control link-delay-allowance 34567
Configure the link delay allowance
Validation
1. Verify the default data set.
#sh priority-flow-control statistics bridge 1
bridge : 1
interface pri pause sent pause received
===========================================
eth1 0 00 00
eth1 1 00 00
eth1 2 00 00
eth1 3 00 00
eth1 4 00 00
eth1 5 00 00
eth1 6 00 00
eth1 7 00 00
 
#sh priority-flow-control details bridge 1
 
Admin Configuration
interface mode advertise willing cap link delay priorities allowance
==============================================================================
 
eth1 on on off 4 34567 2 4 5
 
Operational Configuration
-------------------------
interface state cap link delay priorities allowance
===============================================
eth1 on 4 34567 2 4 5