Passwords; Vtp Version; Configuration Requirements - Cisco IE-3000-8TC Software Configuration Manual

Configuring VTP
If NVRAM and DRAM storage is sufficient, all switches in a VTP domain should be in VTP server
Note
mode.
Do not configure a VTP domain if all switches are operating in VTP client mode. If you configure the
Caution
domain, it is impossible to make changes to the VLAN configuration of that domain. Make sure that you
configure at least one switch in the VTP domain for VTP server mode.

Passwords

You can configure a password for the VTP domain, but it is not required. If you do configure a domain
password, all domain switches must share the same password and you must configure the password on
each switch in the management domain. Switches without a password or with the wrong password reject
VTP advertisements.
If you configure a VTP password for a domain, a switch that is booted without a VTP configuration does
not accept VTP advertisements until you configure it with the correct password. After the configuration,
the switch accepts the next VTP advertisement that uses the same password and domain name in the
advertisement.
If you are adding a new switch to an existing network with VTP capability, the new switch learns the
domain name only after the applicable password has been configured on it.
When you configure a VTP domain password, the management domain does not function properly if you
Caution
do not assign a management domain password to each switch in the domain.

VTP Version

Follow these guidelines when deciding which VTP version to implement:
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Configuration Requirements

When you configure VTP, you must configure a trunk port so that the switch can send and receive VTP
advertisements to and from other switches in the domain.
For more information, see the
Cisco IE 3000 Switch Software Configuration Guide
16-8
All switches in a VTP domain must run the same VTP version.
A VTP Version 2-capable switch can operate in the same VTP domain as a switch running VTP
Version 1 if Version 2 is disabled on the Version 2-capable switch (Version 2 is disabled by default).
Do not enable VTP Version 2 on a switch unless all of the switches in the same VTP domain are
Version-2-capable. When you enable Version 2 on a switch, all of the Version-2-capable switches in
the domain enable Version 2. If there is a Version 1-only switch, it does not exchange VTP
information with switches that have Version 2 enabled.
If there are TrBRF and TrCRF Token Ring networks in your environment, you must enable VTP
Version 2 for Token Ring VLAN switching to function properly. To run Token Ring and Token
Ring-Net, disable VTP Version 2.
"Configuring VLAN Trunks" section on page
Chapter 16 Configuring VTP
15-14.
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