Juniper EX9200 Features Manual page 259

Action
Meaning
Related
Documentation
Copyright © 2017, Juniper Networks, Inc.
Use the operational mode command:
user@switch> show spanning-tree interface
Spanning tree interface parameters for instance 0
Interface Port ID
ge-0/0/0 128:513
ge-0/0/1 128:514
ge-0/0/2 128:515
ge-0/0/3 128:516
ge-0/0/4 128:517
ge-0/0/5 128:518
ge-0/0/6 128:519
ge-0/0/7 128:520
(Root Incon)
[output truncated]
The operational mode command
ge-0/0/7 has transitioned to a root inconsistent state. The root inconsistent state makes
the interface block, discarding any received BPDUs, and prevents the interface from
becoming a candidate for the root port. When the root bridge no longer receives superior
STP BPDUs from the interface, the interface will recover and transition back to a
forwarding state. Recovery is automatic.
Example: Configuring Faster Convergence and Improved Network Stability with RSTP
on page 9
Example: Configuring Loop Protection to Prevent Interfaces from Transitioning from
Blocking to Forwarding in a Spanning Tree on EX Series Switches on page 234
Understanding Root Protection for STP, RSTP, VSTP, and MSTP on EX Series Switches
on page 233
Chapter 10: Using BPDU Protection, Root Protection, and Loop Protection
Designated Designated
port ID bridge ID
128:513 32768.0019e2503f00
128:514 32768.0019e2503f00
128:515 32768.0019e2503f00
128:516 32768.0019e2503f00
128:517 32768.0019e2503f00
128:2 16384.00aabbcc0348
128:1 16384.00aabbcc0348
128:520 32768.0019e2503f00
show spanning-tree interface
Port State Role
Cost
20000 BLK DIS
20000 BLK DIS
20000 BLK DIS
20000 FWD DESG
20000 FWD DESG
20000 BLK ALT
20000 FWD ROOT
20000 BLK DIS
shows that interface
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