hi every body!
I have some confusion about vtp.
In cisco press book by Wendell odom, I find this " VTP client switch can not save vlan configuration in nvram"
In cisco presss book "BCMSN" by David hucaby, i find this" vtp client switch will store the last known vtp information,including the configuration revision number"
question#1 What VTp information includes that vtp client switch maintains even upon power
question#2 Let say we have vtp domain cisco with only two switches(just two for simplicity)sw1 and sw2.
sw1 is server and sw2 is client
sw1(server) has following configuration
ports f0/1-f0/12 are in vlan 2
ports f0/13-f0/20 are in vlan 3
When client switch (sw2) receives vtp advertisement from sw1, will it put similar ports in corresponding vlans i.e pots f0/1-f0/12 in vlan 2 and f0/13-f0/20
in vlan 3?
Thanks alot and have a nice day!
Even though the Catalyst switch is configured as a VTP client, and not a server, it can erase the information of an existing network. Cisco explains the problem as follows:
How a Recently Inserted Switch Can Cause Network Problems
This problem occurs when you have a large switched domain, which is all in the same VTP domain, and you want to add one switch in the network. This switch was previously used in the lab, and a good VTP domain name was entered. It was configured as a VTP client, and connected to the rest of the network. Then, the trunk link was brought up to the rest of the network. In just a few seconds, the whole network is down. What could have happened? The configuration revision of the switch you inserted was higher than the configuration revision of the VTP domain. Therefore, your recently-introduced switch, with almost no configured VLANs, has erased all VLANs through the VTP domain. This happens whether the switch is a VTP client or a VTP server. A VTP client can erase VLAN information on a VTP server. You can tell that this has happened when many of the ports in your network go into inactive state, but continue to be assigned to a nonexistent VLAN.
yes vlan database is vlan name & number.
vlan information is stored in a vlan.dat file in flash on all switches including clients.
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