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New Member

Bridging ethernet on 1721 router

Hi folks!

I have a 1721 with an ethernet wic. I want to bridge the fastethernet0 and ethernet0.

When I set up the bridge-group etc - I cant get frames to pass in either direction.

I need this to test vpn devices across transparent bridging and throttle the i/fs down - I can't use routing - is it possible?

Any help or tips would be greatly appreciated!

First, can you bridge the ethernet0 to fastethernet0 on the 1721.

Second, if so - config would be great!

1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Re: Bridging ethernet on 1721 router

Hello,

You need to configure protocol and bridge routing parameters.

Sample config:

bridge 1 protocol ieee

bridge irb

interface fastethernet 1/0

bridge-group 1

exit

int ethernet 0/0

bridge-group 1

exit

This should enable bridging between the interfaces.

http://www.cisco.com/en/US/docs/ios/bridging/configuration/guide/br_transprn

t_brdg_ps6350_TSD_Products_Configuration_Guide_Chapter.html#wp1003018

Hope this helps.

Regards,

NT

4 REPLIES

Re: Bridging ethernet on 1721 router

Graham, whats the current bridge related configuration you have put on ?

Cisco Employee

Re: Bridging ethernet on 1721 router

Hello,

You need to configure protocol and bridge routing parameters.

Sample config:

bridge 1 protocol ieee

bridge irb

interface fastethernet 1/0

bridge-group 1

exit

int ethernet 0/0

bridge-group 1

exit

This should enable bridging between the interfaces.

http://www.cisco.com/en/US/docs/ios/bridging/configuration/guide/br_transprn

t_brdg_ps6350_TSD_Products_Configuration_Guide_Chapter.html#wp1003018

Hope this helps.

Regards,

NT

New Member

Re: Bridging ethernet on 1721 router

Hi Rob, Nagaraja

Many thanks for your replies.

Nagaraja, I remember messing with the protocol and routing commands but maybe I didn't try exactly as you have shown or both together.

I'll try again tonight (It's my Lab router).

I was starting to think I might need to get a 2960 switch and use QOS!

Again, thanks for taking the trouble to reply.

Graham

New Member

Re: Bridging ethernet on 1721 router

Hello Nagaraja

Thanks - I must have missed something but when I tried your config it all worked great.

I  appreciate your help - thanks!

regards Graham

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