Users Guide

Figure 1. SyncE sample configuration
The following sections explain the minimum configurations that are required to set up different modes of SyncE and hybrid
clocking:
● SyncE QL-enabled mode with ESMC and SSM
● SyncE QL-disabled mode
● PTP and SyncE enabled on different Ethernet ports
● PTP and SyncE enabled on same Ethernet ports
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
System management
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