Users Guide

Example - SyncE QL-enabled mode with ESMC and SSM
SyncE is configured in the QL-enabled mode and ESMC is enabled on Switch A and Switch B. In this example, Switch A is
synchronized to the best input clock source, SRC2 because it has higher QL. This QL value is transmitted from Ethernet
interface 1/1/3 to Switch B, which also gets synchronized to the trail of clock source, SRC2.
Switch A configuration
1. Enable SyncE on the switch.
SwitchA: configure terminal
SwitchA(config)# sync-e enable
2. Set the SyncE mode to QL-enabled.
SwitchA(config)# sync-e mode ql-enabled
3. Configure the synchronization network. The default value is 1, and it is a synchronization network that is designed for
Europe.
SwitchA(config)# sync-e ssm-network-option 1
4. Enable SyncE on the interfaces that are connected to the clock sources and interfaces transmitting to the neighboring
SyncE node.
SwitchA(config)# interface ethernet 1/1/1
SwitchA(conf-if-eth1/1/1)# sync-e enable
SwitchA(conf-if-eth1/1/1)# exit
SwitchA(config)# interface ethernet 1/1/2
SwitchA(conf-if-eth1/1/2)# sync-e enable
SwitchA(conf-if-eth1/1/2)# exit
SwitchA(config)# interface ethernet 1/1/3
SwitchA(conf-if-eth1/1/3)# sync-e enable
5. Enable the ESMC mode on the interfaces that are connected to the clock sources and interfaces transmitting ESMC to the
neighboring SyncE nodes.
SwitchA(config)# interface ethernet 1/1/1
SwitchA(conf-if-eth1/1/1)# sync-e esmc rx-tx
SwitchA(conf-if-eth1/1/1)# exit
SwitchA(config)# interface ethernet 1/1/2
SwitchA(conf-if-eth1/1/2)# sync-e esmc rx-only
SwitchA(conf-if-eth1/1/2)# exit
SwitchA(config)# interface ethernet 1/1/3
SwitchA(conf-if-eth1/1/3)# sync-e esmc tx-only
6. Verify the SyncE configuration.
SwitchA# show sync-e
QL Mode : QL-Enabled
Lock Status : Locked
Selected QL for Tx : QL-PRC
Selection Process State : State 1A(QL-enabled and no active switch request)
Primary Reference Interface : Ethernet 1/1/2
Secondary Reference Interface : Ethernet 1/1/1
Selected Reference Clock Identity : 01:02:03:ff:fe:04:05:06
Local Clock Identity : 11:11:11:ff:fe:11:11:01
SSM Network Option : Option 1
Hold-off Time : 300 ms
Wait-To-Restore Time : 300 secs
SyncE Interfaces
-------------------------------------------------------------------
Interface Priority QL Signal State Status
State
-------------------------------------------------------------------
Ethl/1/1 128 QL-SSU-A Up Available Secondary
Ethl/1/2 128 QL-PRC Up Available Primary
Ethl/1/3 128 QL-DNU Up Available -
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