Cisco WS-C2960-24TC-S-RF Software Guide - Page 146
Configuring the MST Bridge ID Priority
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Configuring MST Chapter 7 Configuring Spanning Tree Console> (enable) show spantree mst 6/1 Edge Port: No, (Configured) Default Link Type: P2P, (Configured) Auto Port Guard: Default Boundary: Yes (PVST) Inst State Role Cost Prio VLANs 0 forwarding ROOT 20000 32 1 1 forwarding BDRY 20000 32 2-20 2 forwarding BDRY 20000 32 21-30 3 forwarding BDRY 20000 32 31-40 4 forwarding BDRY 20000 32 41-50 Console> (enable) Console> (enable) Console> (enable) show spantree mst config Current (NVRAM) MST Region Configuration: Configuration Name:cisco Revision:1 Instance VLANs IST 1,51-4094 1 2-20 2 21-30 3 31-40 4 41-50 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - Console> (enable) Configuring the MST Bridge ID Priority You can set the bridge ID priority for an MST instance when the switch is in MST mode. The switch combines the bridge priority value with the system ID extension (the ID of the MST 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 MST instance, perform this task in privileged mode: Step 1 Step 2 Task Configure the bridge ID priority for an MST instance. Verify the bridge ID priority. Command set spantree priority bridge_priority mst [instance] show spantree mst [instance | mod/port] The example shows how to configure the bridge ID priority for an MST instance: Console> (enable) set spantree priority 8192 mst 3 MST Spantree 3 bridge priority set to 8192. Console> (enable) 7-50 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01
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