Quick Reference Guide

162 | Spanning Tree
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Figure 10-124 shows the output of the show spanning-tree mst port summary command after lowering the
priority of the MST instance (contrast to Figure 10-122):
Figure 10-124. Example Output from show spanning-tree mst port summary Command
The show spanning-tree vlan command displays the association of VLANs with MST instances:
Figure 10-125. Example Output from show spanning-tree vlan Command
Force10 #show spanning-tree mst port summary 50 all
STP STP Port
Interface Mode Type State Role
--------- -------- ------- ----------------- ----------
0/1 Enabled Disabled Disabled
0/2 Enabled Disabled Disabled
0/3 Enabled Disabled Disabled
0/4 Enabled Disabled Disabled
0/5 Enabled Disabled Disabled
0/6 Enabled Disabled Disabled
0/7 Enabled Disabled Disabled
0/8 Enabled Disabled Disabled
0/9 Enabled Disabled Disabled
0/10 Enabled Discarding Backup
0/11 Enabled Forwarding Designated
0/12 Enabled Disabled Disabled
0/13 Enabled Disabled Disabled
0/14 Enabled Disabled Disabled
0/15 Enabled Disabled Disabled
--More-- or (q)uit
After lowering the priority of port 10,
port 11 is set as the forwarding port.
s50-5 #show spanning-tree summary
Spanning Tree Adminmode........... Enabled
Spanning Tree Version............. IEEE 802.1s
Configuration Name................ spt1
Configuration Revision Level...... 1
Configuration Digest Key.......... 0x8a9442199657ea49d1124ea768b5d9a2
Configuration Format Selector..... 0
MST Instances..................... 2,3
s50-5 #show spanning-tree vlan ?
<1-3965> Enter a VLAN identifier.
s50-5 #show spanning-tree vlan 2
VLAN Identifier................................ 2
Associated MST Instance........................ 2
s50-5 #show spanning-tree vlan 3
VLAN Identifier................................ 3
Associated MST Instance........................ 3