VLAN problems

[Christopher Cowart]

On Wed, Jan 30, 2008 at 11:56:10AM -0200, Alexandre Biancalana wrote:
>On 1/30/08, Andrei Kolu <antik at bsd.ee> wrote:
>>>Alexandre Biancalana wrote:
>>>>This server is an Dell Power Edge 1950, QuadCore 2.83, 2Gb Ram, one
>>>>bce gigabit interface connected to a gigabit port of a Cisco 4500 in
>>>>trunk mode.
>>
>>Why you are using trunk mode? IIRC then "trunk" is used only between Cisco
>>switches and routers and your server should be in "access" mode.
>
>I think you don't read the entire thread....
>
>I use trunk mode to "pass" more than one vlan to the same port. Do you
>have any other idea on how to configure this ?

Trunking is definitely what you want. I'm using it successfully 
between Cisco switches and FreeBSD in a number of places.

Here's IOS:
| interface GigabitEthernet1/0/8
|  description dev-wireless-aux
|  switchport trunk encapsulation dot1q
|  switchport trunk native vlan 8
|  switchport trunk allowed vlan 88,665,679
|  switchport mode trunk
|  spanning-tree bpduguard enable

Here's rc.conf:
| ifconfig_fxp1="up"
| ifconfig_vlan88="inet 10.8.0.2 netmask 0xffffc000 vlan 88 
|     vlandev fxp1"
| ifconfig_vlan88_alias0="inet 10.8.0.1 netmask 0xffffffff"
| ifconfig_vlan665="inet 169.229.65.132 netmask 0xffffffc0 vlan 665 
|     vlandev fxp1"
| ifconfig_vlan679="inet 169.229.79.132 netmask 0xffffff80 vlan 679 
|     vlandev fxp1"

You may have already done so, but make sure your trunk is in dot1q mode.
The default trunking protocol is a Cisco proprietary something, if I
understand correctly.

-- 
Chris Cowart
Network Technical Lead
Network & Infrastructure Services, RSSP-IT
UC Berkeley
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