I have a lab that consists of 2 - 4503 with SUPII running
cat4000-i9s-mz.122-25.EWA14.bin as the core devices. I have been
practicing for the BCMSN test and was working with the different VTP
confiuration options. Here are the two issues that I am having. One
of which from reading other posts, I may have answered, but want to
verify.
1- 4503 (Core_1) was configured as Server, but no VTP
summary advertisements where being propegated to the other clients. I
verified the configuration multiple times to ensure accuracy. All VTP
Domain names where empty (factory default). Not until I changed the
VTP Domain name to Test, did I get propegation of vtp advertisements.
I have in the past been able to set up vtp on 3550, 3560 switches with
no VTP Domain name and VTP worked as expected. From reading, it
appears the non propegation of vtp summary advertisements is the norm
for 4503. Can someone verity this.
2-
How do you remove the VTP Domain name from the 4503? I was able to
remove the name from the other devices, 3550, 3560 by doing the
following:
del flash:vlan.dat
wr er
reload
On the 4503 I did the following:
Switch#del /r /f cat4000_flash:vlan.dat
reload
After reload, everything was back. I also assumed when the 4503 was
booting, it may have recieved the VTP information from the other 4503.
So I isolated both by disconnecting the uplinks to all other devices.
Still no go. I have copied the start-up config to a tftp server,
modified the config by removing all vtp information then copied back to
running-config and this worked. But it seems like there should be a
better (easier) way of getting the vtp domain name removed on a 4503
Switch#sh vtp status
VTP Version : 2
Configuration Revision : 0
Maximum VLANs supported locally : 1005
Number of existing VLANs : 5
VTP Operating Mode : Transparent
VTP Domain Name : null2
Hi,
Deleting the vlan.dat from cisco switches will delete the complete vlan and vtp information from database and if you are not able to delete the domain name in these type of situation try configuring the some bogus name with mode as transperent mode so that other should not get impacted.
check out the below link for more information
http://www.ciscosystems.com.ro/en/US/docs/switches/lan/catalyst4500/12.1/12ew/configuration/guide/vtp.html#wp1029449
http://www.cisco.com/en/US/tech/tk389/tk689/technologies_configuration_example09186a00807d5d42.shtml
Hope to Help !!
Ganesh.H
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