From: Luca Hall (lhall@setnine.com)
Date: Sun May 11 2008 - 12:34:57 ART
With 802.1q trunk vlan 1 always carry the control traffic, I change the
native vlan `switchport trunk native vlan X` so now vlan 1 traffic
is tagged. If you have `switchport trunk allowed vlan X` and dont include vlan 1
the control traffic still crosses the trunk, even though `sh int trunk` will
show that vlan 1 is not included in the trunk. The output of `sh int trunk`,
even though it dosent show it, implies vlan 1 is allowed since it cannot be
removed or changed (and control traffic still passes).
Is this correct? Or am I missing something?
Is there anyway to debug this, seeing the actual vlans tagged crossing
the trunk using just the switch not r/span'ning it to a host and sniffing?
This archive was generated by hypermail 2.1.4 : Mon Jun 02 2008 - 06:59:16 ART