[cisco-bba] ATM and Ethernet Question

Andy Saykao andy.saykao at staff.netspace.net.au
Mon Apr 21 22:31:46 EDT 2008

Hi Robert,

Wasn't sure exactly which bit to remove so I tried removing the "atm
route-bridged ip" first from the config but still no Layer 2 between
both end points. I then put it back in and then removed "encapsulation
aal5snap". And lastly I removed both lines from the config. No joy with
any of these combinations.

I saw this Cisco article about using Layer 2 Local Switching
(Configuring ATM-to-Ethernet VLAN Mode Local Switching) at:


Our router is a 7301 and it appears I need to downgrade the IOS on our
router (using 12.3(24)) to a 12.2 release as advised by Cisco's Feauture
Navigator tool - no really sure if this is a good idea.

Thanks for your help.



-----Original Message-----
From: Robert Blayzor [mailto:rblayzor.bulk at inoc.net] 
Sent: Monday, 21 April 2008 9:54 PM
To: Andy Saykao
Cc: cisco-bba at puck.nether.net
Subject: Re: [cisco-bba] ATM and Ethernet Question

On Apr 21, 2008, at 1:09 AM, Andy Saykao wrote:
> bridge irb
> bridge 2 protocol ieee
> bridge 2 route ip
> !
> interface ATM1/0.304470 point-to-point  description ATM VC  bandwidth 
> 2048  atm route-bridged ip  bridge-group 2  pvc 10/100
>   ubr 2048
>   encapsulation aal5snap
> !

I believe you need to remove the route-bridged encapsulation.

Robert Blayzor, BOFH
rblayzor at inoc.net

Mac OS X. Because making Unix user-friendly is easier than debugging

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