Dell PowerConnect J-EX4200-24T Software Manual page 1404

Dell PowerConnect J-Series Ethernet Switch Complete Software Guide for Junos OS
Verification
Purpose
Action
Meaning
Purpose
Action
1332
To confirm that the configuration is working properly:
Displaying the Interface State Before Root Protection Is Triggered on page 1332
Verifying That Root Protection Is Working on the Interface on page 1332
Displaying the Interface State Before Root Protection Is Triggered
Before root protection is triggered on interface
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
ge-0/0/7.0 128:520
[output truncated]
The output from the operational mode command
that is a designated port in a forwarding state.
ge-0/0/7.0
Verifying That Root Protection Is Working on the Interface
A configuration change takes place on Switch 4. A smaller bridge priority on the Switch
4 causes it to send superior BPDUs to interface
interface will trigger root protection. Verify that root protection is operating on
ge-0/0/7
interface .
ge-0/0/7
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
ge-0/0/7.0 128:520
ge-0/0/7
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
ge-0/0/7
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
, confirm the interface state.
Port State
Cost
20000 BLK
20000 BLK
20000 BLK
20000 FWD
20000 FWD
20000 BLK
20000 FWD
20000 FWD
shows
. Receipt of superior BPDUs on
Port State
Cost
20000 BLK
20000 BLK
20000 BLK
20000 FWD
20000 FWD
20000 BLK
20000 FWD
20000 BLK
Role
DIS
DIS
DIS
DESG
DESG
ALT
ROOT
DESG
Role
DIS
DIS
DIS
DESG
DESG
ALT
ROOT
DIS