PVST Port roles
alliasneo
Member Posts: 186
in CCNA & CCENT
I'm currently running plain old STP but I an see an alternate port in my config and I thought this only applied to RSTP?
Switch#sh spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 24577
Address 0001.42C4.23D5
Cost 23
Port 2(GigabitEthernet1/1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0090.2B42.D4AB
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---- ---
Gi0/1 Altn BLK 19 128.1 P2p
Gi1/1 Root FWD 4 128.2 P2p
________________________________
Switch#sh run
Building configuration...
Current configuration : 346 bytes
!
version 12.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch
!
!
spanning-tree mode pvst
!
interface GigabitEthernet0/1
!
Switch#sh spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 24577
Address 0001.42C4.23D5
Cost 23
Port 2(GigabitEthernet1/1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0090.2B42.D4AB
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---- ---
Gi0/1 Altn BLK 19 128.1 P2p
Gi1/1 Root FWD 4 128.2 P2p
________________________________
Switch#sh run
Building configuration...
Current configuration : 346 bytes
!
version 12.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch
!
!
spanning-tree mode pvst
!
interface GigabitEthernet0/1
!
Comments
-
ciscoman2012
Member Posts: 313
This has been pretty helpful:
Understanding Rapid Spanning Tree Protocol (802.1w) [Spanning Tree Protocol] - Cisco Systems