Specifications

8-9
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 Nodes
Configuring PNNI Timers
Configure the PNNI timers with the cnfpnni-timer command.
mgx8830a.1.PXM.a > cnfpnni-timer <node-index> <options>
You can define the initial PNNI timer values and significant change thresholds of a PNNI logical node.
Table 8-4 lists the parameter descriptions for the cnfpnni-timer command.
-bnPathHolddown The border node holddown timer defines the node’s minimum time interval
between two consecutive calculations of the border node path tables. If a
network is stable, it may not be necessary to generate border node route tables
10 times per second. In such a case, you can increase the value to reclaim CPU
time needlessly used to update unchanging routing tables. In such a case, you
can increase the holddown timer value to reclaim CPU time needlessly spent
on updating unchanging routing tables.
Units: 100 millisecond increments
Range: 2-600 (0.2-60 seconds)
Default: 2
-loadBalance This parameter defines how routing connections are distributed across the
routes stored in the SPTs. For more information, see “Configuring the Load
Balance Selection Method,” which appears later in this chapter.
-onDemand This parameter defines how the on-demand routing feature selects routes. For
more information, see “Configuring the On-Demand Route Selection Method
(First Fit or Best Fit),” which appears later in this chapter.
The parameter options are:
firstfit = select the first route found
bestfit = select the best route
Default = firstfit
-awBgTable This parameter enables or disables generation of the AW SPTs for all classes
of service. Enter -awBgTable on to enable AW SPT generation, or enter
-awBgTable off to disable it.
Default = on
-ctdBgTable This parameter enables or disables generation of the CTD SPTs for the CBR,
rt-VBR, and nrt-VBR classes of service. Enter -ctdBgTable on to enable CTD
SPT generation, or enter -ctdBgTable off to disable it.
Default = on
-cdvBgTable This parameter enables or disables generation of the CDV SPTs for the CBR
and rt-VBR classes of service. Enter -cdvBgTable on to enable CDV SPT
generation, or enter -cdvBgTable off to disable it.
Default = on
Table 8-3 Parameters for cnfpnni-routing-policy Command (continued)
Parameter Description