Allied Telesis SwitchBlade x3100 Series Manual page 395

Example (R)STP Configuration - Standard VLAN
TABLE 4-12
Step Command
show stp
2
--- STP Information ----------------------------------------------------------
Spanning Tree Type...................... RSTP
Instance Name......................... MAIN (0)
Instance State........................ ENABLED
Root Bridge ID Priority............ 32768
Root Bridge ID MAC Address....... 00:0C:25:00:06:AD
Max Age (seconds)..................... 20
Hello Time (seconds).................. 2
Forward Delay (seconds)............... 15
Bridge ID Priority................. 32768 (priority 32768 mstid 0)
Bridge ID MAC Address............ EC:CD:6D:03:10:CB
Bridge Max Age (seconds).............. 20
Bridge Hello Time (seconds)........... 2
Bridge Forward Delay (seconds)........ 15
Int Role
----- ---------- ---------- ---------- ----------- -------------------------
0.0 ALTERNATE
0.20 DESIGNATED
0.21 DESIGNATED
0.22 ROOT
1.2 DESIGNATED
1.3 DESIGNATED
11.0 DESIGNATED
Change the SBx3112's root port
The root port switches from interface 0.22 to 0.0, while interface 0.22 becomes a discarding alternate port.
set stp interface 0.0 pathcost 2000
3
Verify the root port change
Software Reference for SwitchBlade x3100 Series Switches (Layer Two Switching)
Configuration Procedure for RSTP
State Cost Prio.Number
DISCARDING 20000 128.321
FORWARDING 200000 128.341
FORWARDING 200000 128.342
FORWARDING 20000 128.343
FORWARDING 2000 128.387
FORWARDING 2000 128.388
FORWARDING 20000 128.1025
Description/Notes
Type
RSTP
RSTP
RSTP
RSTP
RSTP
RSTP
RSTP
Reduces the path cost from 20000 to 2000 on
interface 0.0.
Introduction
4-75