Cisco Systems Native VLAN Warning

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Subject Author Date
Native VLAN Warning andym 08-23-05
Posted by on August 23, 2005, 8:24 am
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We have installed a 1200 Access Point (AP) on a Catalyst 4006 switch
which is also connected to a Catalyst 6509 Switch with MSFC module and
acts as a core layer of the network. All the wireless devices are
connecting via VLAN 50 and users on VLAN 2 and VLAN 3.

After connecting the AP on the switch I've been getting the following
warning on the 4006 switch:-

2005 Aug 23 15:35:09 gmt +02:00 %SYS-4-P2_WARN: 1/Tag 1 on packet from
00:0f:90:8c:b9:9a port 2/14, but port's native vlan is 50

Is there something I need to do? It is very annoying.



Posted by Walter Roberson on August 23, 2005, 5:50 pm
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:We have installed a 1200 Access Point (AP) on a Catalyst 4006 switch
:which is also connected to a Catalyst 6509 Switch with MSFC module and
:acts as a core layer of the network. All the wireless devices are
:connecting via VLAN 50 and users on VLAN 2 and VLAN 3.

:After connecting the AP on the switch I've been getting the following
:warning on the 4006 switch:-

:2005 Aug 23 15:35:09 gmt +02:00 %SYS-4-P2_WARN: 1/Tag 1 on packet from
:00:0f:90:8c:b9:9a port 2/14, but port's native vlan is 50

:Is there something I need to do? It is very annoying.

That sounds to me as if you have trunked VLAN 50 between the
devices, but that you haven't told the AP that it should use a
native VLAN of 50 for the trunk, so it is sending some packets with
VLAN 1. Something on that order anyhow -- a mismatch between what
the two sides know as the "native" VLAN for the trunk.
--
"Never install telephone wiring during a lightning storm." -- Linksys


Posted by on August 23, 2005, 3:40 pm
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To fix this, set the native VLAN on your 4006 using the command, "set
vlan 50 x/x."



Posted by Ian Snowdon on August 24, 2005, 5:11 pm
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robert.edmeister@gmail.com scribes
>To fix this, set the native VLAN on your 4006 using the command, "set
>vlan 50 x/x."
>
In IOS?

switchport trunk native vlan 50
--
Snowy



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