[c-nsp] Bridging two VLANs together

[Collins, Richard (SNL US)]

 Hello,

If I recall correctly, fall-back bridging is only for non-ip traffic.
Though I haven't tested it I believe your configuration with the
addition
of "bridge 2 protocol ieee" should work.

Rich

>I believe what you propose (fall-back bridging) will "work",
>but will be performed in software.

>Yuck.

>Dale


>On Dec 12, 2007, at 2:58 PM, Frank Bulk wrote:

> Protocol 'ieee' is not an option, but 'vlan-bridge' is.  I've  
> applied it to
> the global config.
>
> Anything in:
> http://puck.nether.net/pipermail/cisco-nsp/2005-May/020444.html
> that would suggest this is not enough?
>
> Frank
>
> -----Original Message-----
> From: Masood Ahmad Shah [mailto:masood at nexlinx.net.pk]
> Sent: Wednesday, December 12, 2007 10:54 AM
> To: frnkblk at iname.com; cisco-nsp at puck.nether.net
> Subject: RE: [c-nsp] Bridging two VLANs together
>
> Well, If I understand you are talking about inter-vlan bridging.  
> Yes it
> should work fine. You may need to add
>
> bridge 2 protocol ieee
>
> It's bridge protocol global configuration command to define the  
> type fo STP.
>
>
> Regards,
> Masood Ahmad Shah
>
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Frank Bulk
> Sent: Wednesday, December 12, 2007 9:15 PM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] Bridging two VLANs together
>
> We have a unique situation where our transport equipment can't  
> bridge the
> traffic between two endpoints, so we would like to dump off each  
> link's VLAN
> onto our router (7609-S with WS-X6748-GE-TX blades) where it can  
> perform the
> bridging. Any reason why the following configuration wouldn't work?
>
> interface GigabitEthernet1/31
>  description Customer networks
>  switchport
>  switchport trunk encapsulation dot1q
>  switchport trunk allowed vlan 221-222
>  switchport mode trunk
> end
>
> interface Vlan221
>  description Site 1
>  no ip address
>  bridge-group 2
>  bridge-group 2 spanning-disabled
> !
> interface Vlan222
>  description Site 2
>  no ip address
>  bridge-group 2
>  bridge-group 2 spanning-disabled
> !
>
> Some of you might ask why not put the endpoints in the same VLAN,  
> but the
> endpoints don't maintain an MAC address table so there's nothing to  
> make
> them exchange traffic with each other.
>
> Regards,
>
> Frank
>