[c-nsp] Bridging two VLANs together

[Collins, Richard (SNL US)]

Hello Frank,

I think that I will have a chance to lab this up next week. 
 
I just wanted to say that the fall-back bridging is on the wrong track
and
it seems that only "non-routable" traffic will be bridged with fall-back
and not all traffic (i.e. IP).

Maybe someone else has some more experience here.

Rich

 

-----Original Message-----
From: ext Frank Bulk [mailto:frnkblk at iname.com] 
Sent: Thursday, December 13, 2007 7:21 PM
To: Collins, Richard (SNL US); cisco-nsp at puck.nether.net
>Subject: RE: Re: [c-nsp] Bridging two VLANs together

>The command "bridge 2 protocol ieee" is not available in the 12.2SR
software
>release on this router.

>Bridging isn't really bridging if it's Layer-3 aware, is it? ;)  

>Frank

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Collins, Richard
(SNL US)
Sent: Wednesday, December 12, 2007 4:25 PM
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Bridging two VLANs together


 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
>