Configuring Shortest Path And Topology Discovery; Monitoring And Verifying Topology Discovery And Shortest Path Load Balancing - Cisco ONS 15454 SDH Configuration Manual

Configuring Shortest Path and Topology Discovery

Configuring Shortest Path and Topology Discovery
To enable and configure shortest path and topology discovery, perform the following procedure,
beginning in global configuration mode:
Command
Step 1
Router# interface spr1
Step 2
Router(config-if)# spr topology discovery
Step 3
Router(config-if)# spr load-balance
shortest-hop
Step 4
Router(config-if)# no shutdown
Step 5
Router(config)# end
Step 6
Router# copy running-config startup-config
Monitoring and Verifying Topology Discovery and Shortest Path Load
Balancing
After configuring topology discovery, you can monitor the status using the global command show spr
topology 1 to display the Cisco proprietary RPR topology information.
output of this commands.
Example 17-9 Output of show spr topology command
Router> show spr topology 1
***** ML-RPR Topology Map **************
Local Station Topology Info
Node Id : 40
West Span
East Span
Ring Topology: OPEN (UNSTABLE)
Advertised Protection requests:
ringlet0: IDLEringlet1: IDLE
Active Edges:
=======================================================================
1. Topology Instability
Hops (POS 0)
Hops (POS 1)
Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0
17-36
neighbor : 0
neighbor : 0
ringlet0: NO ringlet1: NO
Sequence Number: 0
East Interface: POS1
Number of nodes on east: 2
Number of nodes on west: 2
Active Topology Defects:
Node Id
4
6
Node Id
2
6
Chapter 17 Configuring Cisco Proprietary Resilient Packet Ring
Purpose
Activates interface configuration mode to
configure the POS interface.
Enables topology discovery on Cisco proprietary
RPR.
Configures shortest path load-balancing for
Layer 2 unicast packets being added to the ring.
Enables the interface by preventing it from
shutting down.
Returns to privileged EXEC mode.
(Optional) Saves configuration changes to the
TCC2/TCC2P flash database.
West Interface: POS0
Edge W/E Request W/E
20 NO/NO
40 NO/NO
Edge W/E Request W/E
20 NO/NO
40 NO/NO
Example 17-9
IDLE/IDLE
IDLE/IDLE
IDLE/IDLE
IDLE/IDLE
illustrates the