Juniper JUNOS OS 10.3 - SOFTWARE Manual page 1668

Complete Software Guide for Junos
Step-by-Step
Procedure
Results
Verification
Purpose
Action
Meaning
Purpose
1572
®
OS for EX Series Ethernet Switches, Release 10.3
To configure loop protection:
Configure interface
ge-0/0/6
1.
[edit protocols rstp]
user@switch# set interface ge-0/0/6 bpdu-timeout-action block
Check the results of the configuration:
user@switch> show configuration protocols rstp
interface ge-0/0/6.0 {
bpdu-timeout-action {
block;
}
}
To confirm that the configuration is working properly, perform these tasks:
Displaying the Interface State Before Loop Protection Is Triggered on page 1572
Verifying That Loop Protection Is Working on an Interface on page 1572
Displaying the Interface State Before Loop Protection Is Triggered
Before loop protection is triggered on interface
blocking.
Use the operational mode command:
user@switch> show spanning-tree interface
Spanning tree interface parameters for instance 0
Interface Port ID
ge-0/0/0.0 128:513
ge-0/0/1.0 128:514
ge-0/0/2.0 128:515
ge-0/0/3.0 128:516
ge-0/0/4.0 128:517
ge-0/0/5.0 128:518
ge-0/0/6.0 128:519
[output truncated]
The output from the operational mode command
that is the alternate port and in a blocking state.
ge-0/0/6.0
Verifying That Loop Protection Is Working on an Interface
Verify the loop protection configuration on interface
on interface ge-0/0/4 on Switch 1. This will stop BPDUs from being sent to interface
and trigger loop protection on the interface.
ge-0/0/6
on Switch 3:
ge-0/0/6
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
128:518 32768.0019e2503f00
128:2 16384.00aabbcc0348
show spanning-tree interface
ge-0/0/6
, confirm that the interface is
Port State
Cost
20000 BLK
20000 BLK
20000 BLK
20000 FWD
20000 FWD
20000 FWD
20000 BLK
. RSTP has been disabled
Copyright © 2010, Juniper Networks, Inc.
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