Table 8: Show Spanning-Tree Interface Output Fields - Juniper EX9200 Features Manual

Spanning-Tree Protocols Feature Guide for EX9200 Switches
Sample Output
show spanning-tree interface
68

Table 8: show spanning-tree Interface Output Fields

Field Name
Interface name
Port ID
Designated port ID
Designated bridge ID
Port Cost
Port State
Port Role
Link type
Alternate
Boundary Port
user@host> show spanning-tree interface routing-instance vs1 detail
Spanning tree interface parameters for instance 0
Interface Port ID
ae1 128:1
ge-2/1/2 128:2
ge-2/1/5 128:3
ge-2/2/1 128:4
xe-9/2/0 128:5
xe-9/3/0 128:6
Spanning tree interface parameters for instance 1
Interface Port ID
ae1 128:1
ge-2/1/2 128:2
Field Description
Interface configured to participate in the STP, RSTP, VSTP, or MSTP
instance.
Logical interface identifier configured to participate in the MSTP or
VSTP instance.
Port ID of the designated port for the LAN segment to which this
interface is attached.
Bridge ID of the designated bridge for the LAN segment to which
this interface is attached.
Configured cost for the interface.
STP port state: forwarding (
FWD
or disabled.
MSTP, VSTP, or RSTP port role: designated (
alternate ( ), ( ), or Root Prevented (
ALT ROOT
MSTP, VSTP, or RSTP link type. Shared or point-to-point (pt-pt)
and edge or nonedge.
Identifies the interface as an MSTP, VSTP, or RSTP alternate root
port ( Yes ) or nonalternate root port (
Identifies the interface as an MSTP regional boundary port (
nonboundary port ( No ).
Designated Designated
port ID bridge ID
128:1 32768.0090690b47d1
128:2 32768.0090690b47d1
128:3 32768.0090690b47d1
128:26 32768.0013c39ec880
128:5 32768.0090690b47d1
128:6 32768.0090690b47d1
Designated Designated
port ID bridge ID
128:1 32769.0090690b47d1
128:2 32769.0090690b47d1
), blocking ( ), listening, learning,
BLK
), backup (
DESG BKUP
).
Root-Prev
No ).
Yes
Port State
Cost
1000 FWD
20000 FWD
29999 FWD
20000 FWD
2000 FWD
2000 FWD
Port State
Cost
1000 FWD
20000 FWD
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),
) or
Role
DESG
DESG
DESG
ROOT
DESG
DESG
Role
DESG
DESG