Vtp Advertisements; Vtp Version 2 - Cisco WS-CBS3032-DEL Software Configuration Manual

Understanding VTP

VTP Advertisements

Each switch in the VTP domain sends periodic global configuration advertisements from each trunk port
to a reserved multicast address. Neighboring switches receive these advertisements and update their VTP
and VLAN configurations as necessary.
Note Because trunk ports send and receive VTP advertisements, you must ensure that at least one trunk port
is configured on the switch or switch stack and that this trunk port is connected to the trunk port of
another switch. Otherwise, the switch cannot receive any VTP advertisements. For more information on
trunk ports, see the
VTP advertisements distribute this global domain information:
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VTP advertisements distribute this VLAN information for each configured VLAN:
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VTP Version 2

If you use VTP in your network, you must decide which version of VTP to use. By default, VTP operates
in version 1.
VTP version 2 supports these features that are not supported in version 1:
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Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
14-4
"Configuring VLAN Trunks" section on page
VTP domain name
VTP configuration revision number
Update identity and update timestamp
MD5 digest VLAN configuration, including maximum transmission unit (MTU) size for each
VLAN.
Frame format
VLAN IDs (IEEE 802.1Q)
VLAN name
VLAN type
VLAN state
Additional VLAN configuration information specific to the VLAN type. In VTP version 3, VTP
advertisements also include the primary server ID, an instance number, and a start index.
Token Ring support—VTP version 2 supports Token Ring Bridge Relay Function (TrBRF) and
Token Ring Concentrator Relay Function (TrCRF) VLANs. For more information about Token Ring
VLANs, see the "Configuring Normal-Range VLANs" section on page
Unrecognized Type-Length-Value (TLV) support—A VTP server or client propagates configuration
changes to its other trunks, even for TLVs it is not able to parse. The unrecognized TLV is saved in
NVRAM when the switch is operating in VTP server mode.
Chapter 14 Configuring VTP
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