ATM Layer 2

[CompCJtoo]

Hello.  I have two 1941 routers with ipbasek9 license and each has, EHWIC4ESG, EHWIC-4SHDSL-EA, and two GigE ports.  I'd like to configure ATM and keep it L2 and only have an IP on the router for management or SVI if needed.  The intent is to connect one to the existing LAN via a trunk then extend existing L2 over the ATM down to the end user and printer.  The routers are essentially physically connected as their is no service provider I'm dealing with. 

I've looked at L2TPv3, bridging, local switching and can't get anything to work and would like to refrain from purchasing a datak9 and seck9 licenses.  Is this possible with the current license and/or does anyone know of a simple ATM configuration for this?  Thanks.

[mlund · Accepted solution]

Hi

I did this years ago, and used this config.

controller DSL 0
 mode atm
 line-term co
 line-mode 4-wire enhanced
 dsl-mode shdsl symmetric annex A
 line-rate 4608
!

bridge irb
!

interface ATM0
 no ip address
 no atm ilmi-keepalive
!
interface ATM0.11 point-to-point
 no snmp trap link-status
 pvc 0/35
  encapsulation aal5snap
 !
 cdp enable
 bridge-group 1
!

interface Vlan1
 no ip address
 no ip route-cache cef
 no ip route-cache
 ip tcp adjust-mss 1452
 bridge-group 1
!

interface Vlan11
 no ip address
 no ip route-cache cef
 no ip route-cache
 ip tcp adjust-mss 1452
 bridge-group 1
!
interface BVI1
 ip address < >
!

bridge 1 protocol ieee
bridge 1 route ip

/Mikael

[CompCJtoo]

mlund,

Hello.  Wanted to say thanks for the insight.  I'm not too sure what I was missing, but configured the devices similar to what you posted and so far have been able to have two different vlans at the end user location send/receive traffic and get an IP from the dhcp server.  Thanks again.