Hi All,
I have a Cisco 3750 switch on which I am seeing the bridge priroty to be 49152. The default bridge priority has not been changed as seen from the running configuration given below -
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log datetime localtime
no service password-encryption
!
hostname Switch
!
enable password 7 XXXX
!
aaa new-model
vtp mode transparent
no ip subnet-zero
ip domain-name lehi.micron.com
ip name-server 10.192.88.4
ip name-server 10.192.88.6
!
!
no file verify auto
!
spanning-tree mode pvst
spanning-tree extend system-id
spanning-tree uplinkfast
!
vlan internal allocation policy ascending
!
vlan 10,100
!
!
interface Vlan1
no ip address
no ip route-cache
no ip mroute-cache
shutdown
!
interface Vlan100
description dbsn
ip address 10.192.100.9 255.255.254.0
no ip redirects
no ip route-cache
no ip mroute-cache
!
ip classless
no ip http server
!
!
Switch#sh spanning-tree vlan 10
VLAN0010
Spanning tree enabled protocol ieee
Root ID Priority 49162
Address 001e.7a50.e100
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 49162 (priority 49152 sys-id-ext 10)
Address 001e.7a50.e100
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Uplinkfast enabled
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Te1/0/1 Desg FWD 3002 128.29 P2p
Te1/0/2 Desg FWD 3002 128.30 P2p
Switch#sh sp
Switch#sh spanning-tree vl
Switch#sh spanning-tree vlan 100
VLAN0100
Spanning tree enabled protocol ieee
Root ID Priority 24676
Address 0022.9060.69c0
Cost 3002
Port 29 (TenGigabitEthernet1/0/1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 49252 (priority 49152 sys-id-ext 100)
Address 001e.7a50.e100
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Uplinkfast enabled
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Te1/0/1 Root FWD 3002 128.29 P2p
Te1/0/2 Desg FWD 3002 128.30 P2p
Switch#sh ver
Cisco IOS Software, C3750E Software (C3750E-UNIVERSAL-M), Version 12.2(35)SE5, R
ELEASE SOFTWARE (fc1)
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Thu 19-Jul-07 16:17 by nachen
Image text-base: 0x00003000, data-base: 0x01C00000
ROM: Bootstrap program is C3750E boot loader
BOOTLDR: C3750E Boot Loader (C3750E-HBOOT-M) Version 12.2(35r)SE1, RELEASE SOFTW
ARE (fc2)
Switch uptime is 1 week, 6 days, 18 hours, 43 minutes
System returned to ROM by power-on
System restarted at 15:11:11 MST Thu Nov 18 2010
System image file is "flash:c3750e-universal-mz.122-35.SE5/c3750e-universal-mz.1
22-35.SE5.bin"
License Level: ipservices Type: Permanent
Next reboot license Level: ipservices
cisco WS-C3750E-24TD (PowerPC405) processor (revision D0) with 245760K/16376K by
tes of memory.
Processor board ID CAT1147W09G
Last reset from power-on
2 Virtual Ethernet interfaces
1 FastEthernet interface
28 Gigabit Ethernet interfaces
2 Ten Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.
512K bytes of flash-simulated non-volatile configuration memory.
Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 30 WS-C3750E-24TD 12.2(35)SE5 C3750E-UNIVERSAL-M
Configuration register is 0xF
I understand that the default priority is 32768+VLAN ID. Can any of check and see if I am missing something?
Thanks.
