Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

VTP problems

i have two cat 4000 with sup 3 engines. Both of my servers are configured as VTP servers so that VLANS can be created on either. However,it seems that when i create a vlan on one switch it is not being propagated to the other switch.

I have tried re-booting the switches and have upgrade the IOS to 12.1(13) EW, but the issue is the same. Also if I need to re-boot the switches, is their any particular order they should be brought back up.

when I execute "sh vtp status" on both switches, i get the following output:

switch1:

VTP Version : 2

Configuration Revision : 10

Maximum VLANs supported locally : 1005

Number of existing VLANs : 10

VTP Operating Mode : Server

VTP Domain Name : infa

VTP Pruning Mode : Disabled

VTP V2 Mode : Enabled

VTP Traps Generation : Disabled

MD5 digest : 0x5C 0xDF 0x45 0xD5 0xD1 0x74 0x44 0x25

Configuration last modified by 10.33.0.2 at 5-9-03 11:10:56

Local updater ID is 10.33.0.2 on interface Vl2 (lowest numbered VLAN interface found)

Switch2:

VTP Version : 2

Configuration Revision : 0

Maximum VLANs supported locally : 1005

Number of existing VLANs : 8

VTP Operating Mode : Server

VTP Domain Name : infa

VTP Pruning Mode : Disabled

VTP V2 Mode : Enabled

VTP Traps Generation : Disabled

MD5 digest : 0x77 0x89 0xDE 0xF4 0xF5 0xCA 0xE6 0x0E

Configuration last modified by 10.33.0.3 at 1-16-03 00:49:45

Local updater ID is 10.33.0.3 on interface Vl2 (lowest numbered VLAN interface found)

1 REPLY

Re: VTP problems

Hi,

check:

1) Are these two switches connected together physically?

If yes, there must be a 802.1q or ISL trunk configured connecting these two switches. Use "sh int x/y switchport" to see if trunk is running OK. Also use "sh VTP count" to check if VTP is being received on proper ports.

If not (i.e. there are some other switches between them) there must be a "trunk path" of switches (all VTP ver 2 belonging to the same VTP domain or transparent) between them.

2) If you are using VTP password it has to be identical on both switches.

Regards,

Milan

190
Views
0
Helpful
1
Replies