Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual page 1983

Copyright © 2010, Juniper Networks, Inc.
Table 262: show spanning-tree bridge Output Fields (continued)
Field Name Field Description
Spanning-tree protocol type enabled.
Enabled protocol
Bridge ID of the elected spanning tree root bridge. The bridge ID consists of a
Root ID
configurable bridge priority and the MAC address of the bridge.
Root cost 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.
Root port
Bridge ID of the elected MSTP regional root bridge.
CIST regional root
Calculated cost to reach the regional root bridge from the bridge where the
CIST internal root
command is entered.
cost
Configured number of seconds between transmissions of configuration BPDUs.
Hello time
Maximum age of received protocol BPDUs.
Maximum age
Configured time an STP bridge port remains in the listening and learning states
Forward delay
before transitioning to the forwarding state.
Hop count Configured maximum number of hops a BPDU can be forwarded in the MSTP
region.
Number of seconds elapsed since the most recent BPDU was received.
Message age
Total number of STP topology changes detected since the switch last booted.
Number of topology
changes
Number of seconds elapsed since the most recent topology change.
Time since last
topology change
Interface name of the interface that received the topology change request.
Topology change
initiator
Bridge ID of the bridge that requested the last topology change.
Topology change last
recvd. from
Bridge ID (Local) Locally configured bridge ID. The bridge ID consists of a configurable bridge
priority and the MAC address of the bridge.
Internally generated system identifier.
Extended system ID
Bridge ID of the elected MSTP regional root bridge.
MSTI regional root
An internally generated identifier.
Internal instance ID
Chapter 75: Operational Commands for Spanning-Tree Protocols
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