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Does VTP messages need inter switch trunks to travel ?

kaustavcisco
Level 1
Level 1

‎04-07-2002 09:54 PM - edited ‎03-01-2019 09:12 PM

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.

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milan.kulik
Level 10
Level 10

‎04-07-2002 11:28 PM

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

HTH,

Milan

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daniel.bowen
Level 1
Level 1

‎04-09-2002 01:35 AM

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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