Configuring Rep For The Synce Network - Cisco 3845 - Security Bundle Router Software Manual

Configuring SyncE

Configuring REP for the SyncE Network

Beginning in privileged EXEC mode, use this procedure to configure a REP segment to avoid timing
loops when a failure occurs. In SynceE ring topologies, we recommend that you configure REP.
Command
Step 1 configure terminal
Step 2 network-clock-select priority SYNCE port number
Step 3
rep administration vlan vlan-id
Step 4
network-clock-select mode revert
Step 5 ql-enabled rep-segment segment-id
Step 6
network-clock-select hold-off-timeout value
Step 7 network-clock-select hold-timeout {value | infinite}
Step 8 network-clock-select wait-to-restore value
Cisco ME 3800X and 3600X Switch Software Configuration Guide
6-10
Chapter 6
Purpose
Enter global configuration mode.
Configure the input clock and its priority.
For priority, the range is from 1 to 15, with 1 being
•
the highest priority and 15 the lowest. Unused input
clocks are given a priority value of 0.
• SYNCE—Select the Synchronous Ethernet clock.
• For port number:
– Enter 0 for TenGigabitEthernet 0/1
– Enter 1 for TenGigabitEthernet 0/2
Specify the REP administrative VLAN. The range is 2 to
4094. The default is VLAN 1. To set the admin VLAN to
1, enter the no rep admin vlan global configuration
command.
(Optional) Configure the reference switching mode so
that if an input clock with a higher priority than the
selected reference becomes valid, the higher priority
clock is immediately selected. This is required in a ring
topology.
Identify a REP segment to use for the REP workaround.
The segment-id range is from 1 to 1024.
(Optional) Configure the time that a switch waits if a
clock source goes down before removing it as the
reference clock. The values are 0 or 50 to 10000 ms . The
default is 300 ms.
This command is valid only when SyncE is
Note
configured with the REP workaround.
(Optional) Configure the time that the switch should
remain in holdover mode and replay the saved clock
information when no reliable clock source is available.
For value, the range is 0 to 86400 seconds.
•
Enter infinite for no timeout.
•
The default is infinite.
(Optional) Configure the time that a switch waits if a
failed SyncE interface comes back up before considering
the interface as a synchronization source.
The range is 0 to 720 seconds. The default is 300 seconds.
Note This command is valid only when SyncE is
configured with the REP workaround.
Configuring Synchronous Ethernet
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