Cisco WS-C4507R-E Software Guide - Page 128
Configuring the MISTP Bridge ID Priority
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Using MISTP-PVST+ or MISTP Chapter 7 Configuring Spanning Tree This example shows how to display the spanning tree VLAN instance mapping in MISTP mode: Console> (enable) set spantree mode mistp PVST+ database cleaned up. Spantree mode set to MISTP. Console> (enable) show spantree mapping Inst Root Mac Vlans 1 00-50-3e-78-70-00 1 2 00-50-3e-78-70-00 - 3 00-50-3e-78-70-00 - 4 00-50-3e-78-70-00 - 5 00-50-3e-78-70-00 - 6 00-50-3e-78-70-00 - 7 00-50-3e-78-70-00 - 8 00-50-3e-78-70-00 - 9 00-50-3e-78-70-00 - 10 00-50-3e-78-70-00 - 11 00-50-3e-78-70-00 - 12 00-50-3e-78-70-00 - 13 00-50-3e-78-70-00 - 14 00-50-3e-78-70-00 - 15 00-50-3e-78-70-00 - 16 00-50-3e-78-70-00 - Configuring the MISTP Bridge ID Priority You can set the bridge ID priority for an MISTP instance when the switch is in MISTP or MISTP-PVST+ mode. The switch combines the bridge priority value with the system ID extension (the ID of the MISTP instance) to create the bridge ID priority. You can set 16 possible bridge priority values: 0, 4096, 8192, 12,288, 16,384, 20,480, 24,576, 28,672, 32,768, 36,864, 40,960, 45,056, 49,152, 53,248, 57,344, and 61,440. To configure the bridge ID priority for an MISTP instance, perform this task in privileged mode: Step 1 Step 2 Task Configure the bridge ID priority for an MISTP instance. Verify the bridge ID priority. Command set spantree priority bridge_ID_priority [mistp-instance instance] show spantree mistp-instance instance [mod/port] active The example shows how to configure the bridge ID priority for an MISTP instance: Console> (enable) set spantree priority 32768 mistp-instance 1 Spantree 1 bridge ID priority set to 32769 (bridge priority: 32768 + sys ID extension: 1) Console> (enable) show spantree mistp-instance 1 Instance 1 Spanning tree mode MISTP Spanning tree type ieee Spanning tree instance enabled Designated Root Designated Root Priority Designated Root Cost Designated Root Port VLANs mapped: 00-05-31-40-64-00 32769 (root priority:32768, sys ID ext:1) 20000 1/1 1,74 7-32 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01
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