Dell SmartFabric OS10 User Guide Release 10.5.3

Example - SyncE QL-disabled mode

In this example, SyncE is configured in the QL-disabled mode. In SyncE QL-disabled mode, QL value is not used for clock selection. To select any specific synchronization clock source, you can configure interface-level priority. If the interface-level priority is not configured, an arbitrary reference source from the available valid clock sources is selected.

Switch A is synchronized to the input clock source, SRC2 based on priority configured on Ethernet interface 1/1/2. This synchronized clock frequency is used for further transmission 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-disabled.

   SwitchA(config)# sync-e mode ql-disabled

3. 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

4. Configure priority on the ports to ensure that the best synchronization clock source is selected.

   SwitchA(conf-if-eth1/1/2)# sync-e priority 1

5. Verify the SyncE configuration.

   SwitchA# show sync-e
   QL Mode                            : QL-Disabled
   Lock Status                        : Locked
   Selected QL for Tx                 : -
   Selection Process State            : State 2A(QL-disabled and no active switch request)
   Primary Reference Interface        : Ethernet 1/1/2
   Secondary Reference Interface      : Ethernet 1/1/1
   Selected Reference Clock Identity  : -
   Local Clock Identity               : 8c:04:ba:ff:fe:b0:96:40
   SSM Network Option                 : Option 1
   Hold-off Time                      : 300 ms
   Wait-To-Restore Time               : 300 s
   SyncE Interfaces
   -------------------------------------------------------------
   Interface    Priority  QL    Signal   State       Status
                                State
   -------------------------------------------------------------
   Ethl/1/1     100       -     Up       Available   Secondary
   Ethl/1/2     1         -     Up       Available   Primary
   Ethl/1/3     128       -     Up       Available   -
   -------------------------------------------------------------

Switch B configuration

1. Enable SyncE on the switch.

   SwitchB: configure terminal
   SwitchB(config)# sync-e enable

2. Set the SyncE mode to QL-disabled.

   SwitchB(config)# sync-e mode ql-disabled

3. Enable SyncE on the interfaces that are connected to the clock sources and interfaces transmitting to the neighboring SyncE node.

   SwitchB(config)# interface ethernet 1/1/1
   SwitchB(conf-if-eth1/1/1)# sync-e enable

4. Verify the SyncE configuration.

   SwitchB# show sync-e
   QL Mode                           : QL-Disabled
   Lock Status                       : Locked
   Selected QL for Tx                : -
   Selection Process State           : State 2A(QL-disabled and no active switch request)
   Primary Reference Interface       : Ethernet 1/1/1
   Secondary Reference Interface     : -
   Selected Reference Clock Identity : -
   Local Clock Identity              : 8c:04:ba:ff:fe:b0:a5:40
   SSM Network Option                : Option 1
   Hold-off Time                     : 300 ms
   Wait-To-Restore Time              : 300 s
   SyncE Interfaces
   ------------------------------------------------------------
   Interface    Priority  QL    Signal   State       Status
                                State
   ------------------------------------------------------------
   Ethl/1/1     128        -    Up       Available   Primary
   ------------------------------------------------------------