[103156] in North American Network Operators' Group
Re: do you know how to dump packet to see vlan info
daemon@ATHENA.MIT.EDU (Bill Nash)
Wed Mar 19 16:41:26 2008
Date: Wed, 19 Mar 2008 13:40:20 -0700 (MST)
From: Bill Nash <billn@billn.net>
To: ann kok <annkok2001@yahoo.com>
cc: nanog@merit.edu
In-Reply-To: <47E16394.6080101@aset.com>
Errors-To: owner-nanog@merit.edu
You can use the 8021q module in linux, and the vlan tools to run an
interface as a dot1q trunk. I'm not sure off-hand about the other
distributions, but under Debian you just need the 'vlan' package.
modprobe 8021q
ifconfig eth1 up
vconfig add eth1 <vlan id>
ifconfig eth1.<vlan id> <ip address> netmask <netmask>
Configure your switch port to trunk mode, tag your vlans onto it, et
voila.
This will give you a presence in as many broadcast domains as you decide
to tag.
- billn
On Wed, 19 Mar 2008, Jon R. Kibler wrote:
> ann kok wrote:
>> Hi all
>>
>> I am using linux as router to connect to switch
>>
>> do you know how to dump packet to see vlan info?
>>
>> Thank you
>
> You won't see vlan info unless you are on a trunking port.
>
> Jon Kibler
>
