[c-nsp] Bridging two VLANs together

[Frank Bulk]

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

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