[Parameter]
ifname
:
Name of LAN/SFP port or logical interface
Interface to show
[Input mode]
unprivileged EXEC mode, priviledged EXEC mode
[Description]
Shows the spanning tree status.
If "interface" is omitted, the status of all interfaces is shown.
In the case of MSTP, shows CIST (instance #0) information.
The following items are shown.
Item
Description
Bridge up
Spanning tree protocol enabled/disabled
Root Path Cost
Path cost of the root bridge
Root Port
Interface index number of the root port. Shows 0 if it is the
root bridge. In the case of a logical interface, this is shown as
the interface index number of the logical interface.
Bridge Priority
Bridge priority
Forward Delay
Root bridge forwarding delay time setting
Hello Time
Hello time setting of the root bridge
Max Age
Maximum ageing time setting of the root bridge
Root Id
Root bridge identifier. This consists of the root bridge priority
(the first four hexadecimal digits) and MAC address
Bridge Id
Bridge identifier. This consists of the bridge priority (the first
four hexadecimal digits) and MAC address
topology change(s)
Number of times that a topology change has occurred (to be
precise, this indicates the number of BPDU that have the TC
flag)
last topology change
Date and time at which the last topology change occurred
Ifindex
Interface index number
Port Id
Interface's port ID
Role
Role of the interface. This is either Disabled, Designated,
Rootport, or Alternate
State
State of the interface. This is either Listening, Learning,
Forwarding, or Discarding
Designated Path Cost
Path cost
Configured Path Cost
Path cost setting of the interface
Add type Explicit ref count
Number of STP domains associated with the interface
Designated Port Id
ID of the designated port
Priority
Priority of the interface
Root
Root bridge identifier. This consists of the root bridge priority
(the first four hexadecimal digits) and MAC address
Designated Bridge
Bridge identifier. This consists of the bridge priority (the first
four hexadecimal digits) and MAC address
Message Age
Elapsed time of message
Hello Time
Hello time setting value
Command Reference | Layer 2 functions |
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