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Use caution when inserting a new switch
into an existing domain. In order to prepare a switch to enter an
existing VTP domain, perform the following steps:
- Issue a clear
config all or erase
startup-config command to
remove the existing configuration. This will not clear the VTP
configuration revision number. Clearing the revision number is
done only by power cycling the switch.
- Power cycle the switch to clear
the VTP nonvolatile RAM (NVRAM). This will reset the
configuration revision number to 0. This ensures that the new
switch will not propagate incorrect information across the
domain.
- Determine the VTP mode of
operation of the switch and include the mode when setting the
VTP domain information on the switch using the
show vtp status
or
show vtp domain
command. The default for most
switches is server mode. If you leave the switch in server mode,
be sure to verify that the configuration revision number is set
to 0 before adding the switch to the VTP domain. It is generally
recommended that you have several servers in the domain, with
all other switches set to client mode for purposes of
controlling VTP information.
It is also highly recommended that
you use secure mode in your VTP domain. Assigning a password to the
domain will accomplish this. This will prevent unauthorized switches
from participating in the VTP domain. Use the vtp
password password
or the set
vtp passwd passwd commands.
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Lab
Activity |
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In
this lab activity, you will learn how to
configure a VLAN trunk between a Catalyst 4000
and Catalyst 2900 switch. |
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