OcNOS-SP : Timing and Synchronization Guide : Synchronous Ethernet Configuration Guide : Configuring Synchronous Ethernet : Using Quality Level
Using Quality Level
In the procedure below, SW1 and SW3 are both configured as output sources, with SW1 having quality level QL_PRC and SW3 having quality level QL_SSU_A. SW2 is configured to accept a frequency from either SW1 or SW3. Because quality level is used as the clock selection criteria (the default setting), SW2 chooses SW1 as the frequency source.
SW1
 
#configure terminal
Enter configure mode.
(config)#synce
Enter configure Synchronous Ethernet mode.
(config-synce)#synchronization option 1
Set the synchronization network type.
(config-synce)#exit
Exit configure Synchronous Ethernet mode.
(config)#interface eth6
Configure interface eth6.
(config-if)#switchport
Configure eth6 as a layer 2 port.
(config-if)# bridge group 1
Configure the interface to be part of bridge 1.
(config-if)#synce
Enter interface Synchronous Ethernet mode.
(config-if-synce)#mode synchronous
Configure synchronous mode.
(config-if-synce)#output-source
Configure the interface as an output source.
(config-if-synce)#quality-level QL_PRC
Assign the quality level as PRC.
(config-if-synce)#exit
Exit interface Synchronous Ethernet mode.
(config-if)#exit
Exit interface mode.
SW2
 
(config)#interface eth9
Configure interface eth9.
(config-if)#switchport
Configure eth9 as a layer 2 port.
(config-if)# bridge group 1
Configure the interface to be part of bridge 1.
(config-if)#synce
Enter interface Synchronous Ethernet mode.
(config-if-synce)#mode synchronous
Configure synchronous mode.
(config-if-synce)#input-source 2
Configure the interface as an input source with priority 2.
(config-if-synce)#exit
Exit interface Synchronous Ethernet mode.
(config-if)#exit
Exit interface mode.
(config)#interface eth10
Configure interface eth10.
(config-if)#switchport
Configure eth10 as a layer 2 port.
(config-if)# bridge group 1
Configure the interface to be part of bridge 1.
(config-if)#synce
Enter interface Synchronous Ethernet mode.
(config-if-synce)#mode synchronous
Configure synchronous mode.
(config-if-synce)#input-source 2
Configure the interface as an input source with priority 2.
(config-if-synce)#exit
Exit interface Synchronous Ethernet mode.
(config-if)#exit
Exit interface mode.
SW3
 
(config)#interface eth6
Configure interface eth6.
(config-if)#switchport
Configure eth1 as a layer 2 port.
(config-if)# bridge group 1
Configure the interface to be part of bridge 1.
(config-if)#synce
Enter interface Synchronous Ethernet mode.
(config-if-synce)#mode synchronous
Configure synchronous mode.
(config-if-synce)#output-source
Configure the interface as an output source.
(config-if-synce)#quality-level QL_SSU_A
Assign the quality level as SSU_A.
(config-if-synce)#exit
Exit interface Synchronous Ethernet mode.
(config-if)#exit
Exit interface mode.
Validation
SW1
1. Verify the Synchronous Ethernet details.
#Verify the output source.
#show synce output-sources
Interface Name : eth6
Link State : Up
QL Configured : QL_PRC
QL Operational : QL_PRC
SW2
1. Verify the input source.
#show synce input-sources
Interface Name : eth9
ESMC Status : OK
Is-selected-Source : Yes
QL Configured : N/A
QL received in ESMC : QL_PRC
QL Operational : QL_PRC
Priority : 2
Hold-off(ms) : 300
Wait-to-restore(mins) : 5
Link State : Up
Signal Fail : No
External Commands : None
Clock-source-ID : 256
WTR Timer Running : No
Hold-off Timer Running : No
 
 
Interface Name : eth10
ESMC Status : OK
Is-selected-Source : No
QL Configured : N/A
QL received in ESMC : Ql_SSU_A
QL Operational : Ql_SSU_A
Priority : 2
Hold-off(ms) : 300
Wait-to-restore(mins) : 5
Link State : Up
Signal Fail : No
External Commands : None
Clock-source-ID : 256
WTR Timer Running : No
Hold-off Timer Running : No
 
2. Verify the Synchronous Ethernet details.
#
# show synce de
Equipment Clock : EEC-option1
Interface Name : eth9
ESMC Status : OK
Is-selected-Source : YES
QL : QL_PRC
SyncE Clock State : Locked
DPLL Clock State : Locked
Synce State Duration : 00:02:25
Selected-Clk-Src-ID : 256
 
SW3
1. Verify the Synchronous Ethernet details.
#
#show synce de
Equipment Clock : EEC-option1
SyncE Clock State : Free-run
DPLL Clock State : Free-run
 
2. Verify the output source on SW3.
#
Interface Name : eth6
Link State : Up
QL Configured : QL_SSU_A
QL Operational : QL_SSU_A
 
Note: Use “show synce stats” to check the counter statistics and use “clear synce stats” to clear the counters. Show esmc counters changed to show synce stats.
Last modified date: 06/30/2023