Juniper EX9253 Hardware Manual page 105

1. In configuration mode, go to the [edit chassis synchronization] hierarchy level.
[edit]
user@host# edit chassis synchronization
2. Configure the Synchronous Ethernet clock selection mode as auto-select or free-run to select the
clock source either from an external qualified clock or from a free-run local oscillator.
[edit chassis synchronization]
user@host# set clock-mode (auto-select | free-run)
3. Enable Ethernet Synchronization Message Channel (ESMC) packet transmission on all interfaces or
on a specific interface.
[edit chassis synchronization]
user@host# set esmc-transmit interfaces (all |
4. Configure the hold interval as configuration-change, which is the wait time (from 15 seconds
through 60 seconds) after a change in configuration; restart, which is the wait time (from 60
seconds through 180 seconds) after reboot of the switch; and switchover, which is the switchover
wait time (from 30 seconds through 60 seconds) after clock recovery.
[edit chassis synchronization]
user@host# set hold-interval configuration-change
user@host# set hold-interval restart
user@host# set hold-interval switchover
5. Configure the EEC synchronization networking type as option-1 or option-2.
[edit chassis synchronization]
user@host# set network-option (option-1 | option-2)
6. Configure the quality-mode-enable statement to enable Synchronous Ethernet ESMC quality mode.
[edit chassis synchronization]
user@host# set quality-mode-enable
7. Configure the selection mode for the incoming ESMC quality as configured-quality or received-
quality. Specify the configured-quality option to enable the clock source selection algorithm to use
interface-name)
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