
5-18
Cisco 6400 Software Setup Guide
OL-1183-04
Chapter5 Redundancy and SONET APS Configuration
NLC Redundancy
Example
In the following example, the OC-12s in slots 5 and 6 are configured for redundancy:
!
redundancy
associate slot 5 6
!
Configuring Redundant Half-Height NLCs
For two half-height NLCs to act as a redundant pair, they must be installed in one of the following
slot/subslot pairs:
• 1/0 and 2/0, or 1/1 and 2/1
• 3/0 and 4/0, or 3/1 and 4/1
• 5/0 and 6/0, or 5/1 and 6/1
• 7/0 and 8/0, or 7/1 and 8/1
Note By default, the NLC in the lower slot number is the working device, and the NLC in the higher slot
number is the protection device.
To configure redundant half-height NLCs, complete the following steps beginning in global
configuration mode:
Example
In the following example, the OC-3s in subslots 3/0 and 4/0 are configured as a redundant pair:
!
redundancy
associate subslot 3/0 4/0
!
Verifying NLC Redundancy
To verify NLC redundancy, use the show aps EXEC command on the NSP. The show aps command
displays the status for all NLCs configured for port redundancy.
Switch# show aps
ATM7/0/0: APS Lin NR Uni, Failure channel: Protection
Active Channel: CHANNEL7/0/0, Channel stat: Good
Port stat (w,p): (Good, Good)
ATM7/0/1: APS Lin NR Uni, Failure channel: Protection
Active Channel: CHANNEL7/0/1, Channel stat: Good
Port stat (w,p): (Good, Good)
Command Purpose
Step1
Switch(config)# redundancy
Enters the redundancy configuration submode.
Step2
Switch(config-r)# associate subslot slot/subslot
[slot/subslot]
Configures the two subslots as a redundant pair. You
need only specify the first subslot of the redundant
pair. The second subslot is assumed to be the adjacent
slot.
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