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Cisco Catalyst Blade Switch 3130 for Dell Software Configuration Guide
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Chapter13 Configuring VTP
Configuring VTP
Enabling VTP pruning on a VTP server enables pruning for the ent ire ma nagem e nt d oma in. Mak ing
VLANs pruning-eligible or pruning-ineligible affects pruning eligibility for those VLANs on th at tr unk
only (not on all switches in the VTP domain).
See the “Enabling VTP Pruning” section on page 13-14. VTP pruning takes effect several seconds after
you enable it. VTP pruning does not prune traffic from VLANs that are pruning-ineligible. VLAN 1 and
VLANs 1002 to 1005 are always pruning-ineligible; traffic from these VLANs cannot be pruned.
Extended-range VLANs (VLAN IDs higher than 1005) a re al so pru ni ng- ine ligib le.
VTP pruning is not designed to function in VTP transparent mode. If one or more switches in the
network are in VTP transparent mode, you should do one of these:
•Turn off VTP pruning in the entire network.
•Turn off VTP pruning by making all VLANs on the trunk of the switch upstream to the VTP
transparent switch pruning ineligible.
To configure VTP pruning on an interface, use the switchport trunk pruning vlan interface
configuration command (see the “Changing the Pruning-Eligible List” section on page 12-23). VTP
pruning operates when an interface is trunking. You can set VLAN pruning-eligibility, whether or not
VTP pruning is enabled for the VTP domain, whether or not any given VLAN exists, and whether or not
the interface is currently trunking.

VTP and Switch Stacks

VTP configuration is the same in all members of a switch stack. When the switch stack is in VTP server
or client mode, all switches in the stack carry the same VTP configuration. When VTP mode is
transparent, the stack is not taking part in VTP.
•When a switch joins the stack, it inherits the VTP and VLAN properties of the stack master.
•All VTP updates are carried across the stack.
•When VTP mode is changed in a switch in the stack, the other switches in the s tack also c hange VTP
mode, and the switch VLAN database remains consistent.
For more information about the switch stack, see Chapter5, “Managing Switch Stacks.”
Configuring VTP
These sections contain this configuration information:
•Default VTP Configuration, page 13-7
•VTP Configuration Options, page 13-7
•VTP Configuration Guidelines, page 13-8
•Configuring a VTP Server, page 13-9
•Configuring a VTP Client, page 13-11
•Disabling VTP (VTP Transparent Mode), page 13-12
•Enabling VTP Version 2, page 13-13
•Enabling VTP Pruning, page 13-14
•Adding a VTP Client Switch to a VTP Domain, page 13-14