do you know how to dump packet to see vlan info

Wed Mar 19 20:40:20 UTC 2008

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
>