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New Member

Does VTP messages need inter switch trunks to travel ?

I have a stack of 3500XL of 5 switches and daisy chained to each other.They have been configured in a single VTP domain and 7 VLANS spread in the 5 switches.Will the uplinked ports be configured as trunks using dot1q or isl for VTP messages to travel between swithches or shall I keep the uplinks in only in the management VLAN.

2 REPLIES

Re: Does VTP messages need inter switch trunks to travel ?

Yes, you need to configure trunks for VTP messages to pass.

HTH,

Milan

New Member

Re: Does VTP messages need inter switch trunks to travel ?

VTP messages will run over all trunk types (ISL, 802.1q and LANE). Consider your options, it matters not whether your run ISL or dot1q as they will both work, but they do work in certain ways. ISL will encapsulate the original packet adding 20 bytes of ISL header and trailer. Dot1q qill simply add a VLAN tag of 4 bytes to the frame. Dot1q is compatible with other vendor switches whereas ISL is not. Seeing that you are Cisco only, I would recommend ISL.

Hope this has helped

Daniel,

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