Verifying Switching Connections
Use the show connection, show connection
all
, show connection id conn id, and show connection conn name
commands to verify the current switching connections.
Local Switching Redundancy
Local Switching Redundancy provides a backup attachment circuit (AC) when the primary attachment circuit
fails. All the ACs must be on the same Cisco ASR 1000 Series Aggregation Services Router.
The following combinations of CEM ACs are supported:
•
CEM ACs on different SPAs on the same SIP
•
CEM ACs on different SIPs on the same Cisco ASR 1000 Series Aggregation Services Router
Guidelines for Local Switching Redundancy
Local Switching Redundancy guidelines are as follows:
•
Autoconfiguration of CEM interfaces is not supported.
•
Only the tail-end AC can be backed up. If head end fails, there is no protection.
•
The circuit type of the primary and backup AC must be identical (failover operation will not switch
between different types of interfaces or different CEM circuit types).
•
Backs up a local switching connection to cem-ckt3 of CEM interface cem3. Only one backup AC is
allowed for each connection.
•
Auto configuration of backup CEM circuits is not allowed.
•
The CEM circuit that is used as a backup in a local switching connection cannot be used for Xconnect
configurations.
•
Dynamic modification of parameters in a local switching connection is not supported in a scenario where
the tail-end segment is backed up to a segment using the backup command. If you want to modify the
parameters in any of the three segments (head-end, tail-end, or backup), you must first unconfigure with
the backup command, make the changes in the individual segments, and then reconfigure the backup
with the backup command.
Configuring a Backup Switched Connection
To configure a backup switched connection, when the primary connection fails, perform the following
procedure:
SUMMARY STEPS
1.
Router#
configure terminal
2.
Router(config)# [no] connect name cem x/y/z circuit-id cem a/b/c circuit-id
3.
Router(config-connection)# backup interface cemx/y/z circuit-id
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS
XE Everest 16.5
504
OL-14127-17
Configuring the Circuit Emulation over Packet Shared Port Adapter
Local Switching Redundancy