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Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, Cisco MGX 8830, and Cisco MGX 8880 Configuration Guide
Release 5.0.10, OL-3845-01 Rev. B0, August 16, 2004
Chapter 8 Managing PNNI Nodes and PNNI Routing
Managing PNNI Routes
To configure the route selection method, enter the cnfpnni-routing-policy command as follows:
mgx8830a.1.PXM.a >
cnfpnni-routing-policy
-
onDemand
firstfit|bestfit
Enter firstfit to select the first route discovered, or enter bestfit to select the optimum route.
To display the route selection method, enter the dsppnni-routing-policy command as follows:
mgx8830a.1.PXM.a >
dsppnni-routing-policy
SPT epsilon......... 0 Load balance........ random
SPT holddown time... 1 On demand routing... first fit
SPT path holddown time 2 AW Background Table on
CTD Background Table on CDV Background Table on
The parameter labeled On demand routing shows which route selection method is configured.
Configuring the Load Balance Selection Method
When multiple eligible routes are found in an SPT during call setup, the load balancing feature attempts
to balance the load among those routes. The load balance options are random and maxbw. The random
option randomly chooses between the eligible routes each time a new call is set up. The maxbw option
selects the route with the maximum available bandwidth.
Note
The route selection process is described in the Cisco PNNI Network Planning Guide for MGX and SES
Products.
To configure the load balance option, use the cnfpnni-routing-policy command as follows:
mgx8830a.1.PXM.a >
cnfpnni-routing-policy
-loadBalance random|maxbw
Enter random to randomly choose among the eligible route, or enter maxbw to select the route with the
greatest available bandwidth.
To display the route selection method, enter the dsppnni-routing-policy command as follows:
mgx8830a.1.PXM.a >
dsppnni-routing-policy
SPT epsilon......... 0 Load balance........ random
SPT holddown time... 1 On demand routing... first fit
SPT path holddown time 2 AW Background Table on
CTD Background Table on CDV Background Table on
The parameter labeled Load balance shows which load balance method is configured.
Managing Preferred Routes
You can manually create a route that is preferred for specific SPVC and SPVP connections. Once a
preferred route is created, the associated SPVC or SPVP connections will attempt to route through the
preferred route before attempting other routes.
Note
A preferred route can be assigned to multiple SPVCs or SPVPs.
