Information Menu 41
Common Internal Spanning Tree information
Command: /info/l2/cist
Mstp Digest: 0xac36177f50283cd4b83821d8ab26de62
Common Internal Spanning Tree:
VLANs: 1 3-4094
Current Root: Path-Cost Port MaxAge FwdDel
8000 00:03:42:fa:3b:80 11 1 20 15
CIST Regional Root: Path-Cost
8000 00:03:42:fa:3b:80 11
Parameters: Priority MaxAge FwdDel Hops
32768 20 15 20
Port Prio Cost State Role Designated Bridge Des Port Hello Type
---- ---- ---- ------ ---- --------------------- -------- ----- ----
1 128 2000 FWD DESG 8000-00:03:42:fa:3b:80 8001 4 P2P, Edge
2 128 2000 FWD DESG 8000-00:03:42:fa:3b:80 8002
3 128 2000 DSB
4 128 2000 DSB
5 128 2000 DSB
6 128 2000 DSB
7 128 2000 DSB
8 128 2000 DSB
9 128 2000 DSB
10 128 0 DSB
11 128 2000 FWD DESG 8000-00:03:42:fa:3b:80
12 128 2000 DSB
In addition to seeing if Common Internal Spanning Tree (CIST) is enabled or disabled, you can view the following
CIST bridge information:
• Status of Uplink Fast (upfast)
• CIST root
• CIST regional root
• Priority
• Maximum age value
• Forwarding delay
• Hops
You can also refer to the following port-specific CIST information:
• Port number and priority
• Cost
• State
• Role
• Designated bridge and port
• Hello interval
• Link type and port type
The following table describes the CIST parameters.
Table 24 Common Internal Spanning Tree parameter descriptions
Parameter Description
CIST Root Shows information about the root bridge for the Common Internal Spanning Tree
(CIST). Values on this row of information refer to the CIST root.
CIST Regional Root Shows information about the root bridge for this MSTP region. Values on this row of
information refer to the regional root.
Priority (bridge) The bridge priority parameter controls which bridge on the network will become the
STP root bridge.
