From: Joseph Ezerski (jezerski@xxxxxxxxxxxx)
Date: Wed Dec 05 2001 - 23:21:41 GMT-3
In the 802.1q sense, the native VLAN is the VLAN for untagged frames. So,
if you have an 802.1q trunk set up, all the control and management traffic
(like STP), as well as traffic originating on that same VLAN do not get a
VLAN tag. All other VLANs get a tag, so the switch knows how to deal with
them. Also note that ISL does not use a native VLAN and tags everything.
So, for ISL the concept of native vlan is just what VLAN this port will be
in when it is NOT trunking.
HTH
-Joe
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Neil Garcia Legada
Sent: Wednesday, December 05, 2001 5:41 PM
To: ccielab@groupstudy.com
Subject: Native VLAN on Catalyst
Hi Group,
Anybody had a good explanation about native VLAN and whats its use for ???
I just had a problem wherein one router is trunked connected to the switch
and the switch itself has an RSM. Both the router and RSM are routing
between VLAN's with HSRP. When the native VLAN on the devices are different
they lost connectivity.
Appreciate any feedback.
Thanks and regards,
Neil
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