Specifications

Switching show mstp cist 8-189
Software Release 2.7.3
C613-03098-00 REV A
show mstp cist
Syntax SHow MSTp CIST
Description This command displays the information about the Common Internal Spanning
Tree (Figure 8-23 on page 8-189, Table 8-43 on page 8-189).
Figure 8-23: Example output from the show mstp cist command
Common Internal Spanning Tree
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Bridge Identifier................................32768 : 00-00-cd-05-19-28
Bridge Role......................................Root Bridge
VLAN Members.....................................1, 2-10, 20
CIST Root Bridge.................................32768 : 00-00-cd-05-19-28
CIST Regional Root Bridge........................32768 : 00-00-cd-05-19-28
Designated Bridge................................32768 : 00-00-cd-05-19-28
Root Port........................................N/A
External Root Path Cost..........................0
Internal Root Path Cost..........................0
Performance:
Max Age........................................20
Hello Time.....................................2
Forward Delay..................................20
Max Hops.......................................5
Bridge Max Age.................................20
Bridge Hello Time..............................20
Bridge Forward Delay...........................20
Bridge Max Hops................................20
Transmission Limit.............................3
Topology Changes:
Time Since Topology Change.....................100
Topology Change Count..........................3
Topology Change................................FALSE
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Table 8-43: Example output from the show mstp cist command
Parameter Meaning
Bridge Identifier The unique bridge identifier of the switch. This
parameter consists of two parts, one part is derived
from the switch’s unique MAC Address, and the
other part is the priority value entered for the switch.
Bridge Role The role of the bridge in the CIST. This can be either,
the root bridge regional root bridge or designated
bridge.
VLAN Members A list of the VLANs that are mapped to the Multiple
spanning tree instance specified.
CIST Root Bridge The bridge identifier of the CIST Root of the bridged
local area network.
CIST Regional Root Bridge The bridge identifier of the root bridge for the CIST in
an MST region (MSTR).
Designated Bridge The bridge identifier of the bridge through which the
root bridge may be reached from this device.