Juniper EX9200 Features Manual page 156

Spanning-Tree Protocols Feature Guide for EX9200 Switches
Table 13: Summary of Spanning Tree Protocols Output Fields (continued)
Field
Routing instance name
NOTE: The option is supported only on
EX4300 switches.
Context ID
Enabled Protocol
Root ID
Root cost
Root port
Bridge ID
Hello time
Forward delay
Extended System ID
Inter Instance ID
Maximum age
Number of topology changes
Time since last topology change
NOTE: This option is supported only on
EX4300 switches.
Spanning Tree Interface Details
Interface Name
Port ID
Designated Port ID
140
Values
Displays bridge information for the specified routing instance.
An internally generated identifier.
Spanning-tree protocol type enabled.
Bridge ID of the elected spanning-tree root bridge.
The bridge ID consists of a configurable bridge priority and the MAC address of
the bridge.
Calculated cost to reach the root bridge from the bridge where the command is
entered.
Interface that is the current elected root port for this bridge.
Locally configured bridge ID.
The time for which the bridge interface remains in the listening or learning state.
The time for which the bridge interface remains in the listening or learning state
before transitioning to the forwarding state.
The system ID.
An internally generated instance identifier.
Maximum age of received bridge protocol data units (BPDUs).
Total number of spanning-tree protocol topology changes detected since the
switch last booted.
Number of seconds elapsed since the last topology change.
Interface configured to participate in the spanning-tree protocol instance.
Logical interface identifier configured to participate in the spanning-tree protocol
instance.
Port ID of the designated port for the LAN segment to which the interface is
attached.
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