[c-nsp] Bridging an ATM and Ethernet interfaces on a Cisco 7200VXR

Eugene van der Merwe eugene at snowball.co.za
Wed Mar 27 03:11:37 EDT 2013


We have a Cisco 7200VXR and I want to try to bridge the ATM and Ethernet
interfaces.

The reason why I want to bridge the ATM and Ethernet interfaces is because
I want to move a firewall downstream from the border, and would prefer to
just plug in the Cisco as a bridge to the Internet instead of using public
IP subnetting for the firewall interface. Is this possible? Is this a
stupid idea?

On the Cisco I have this configuration:

interface FastEthernet0/0
 ip address 196.x.x.x 255.255.255.0
 no ip route-cache cef
 duplex half

interface ATM3/0
 description Circuit Description
 bandwidth xx000
 ip address 196.y.y.y 255.255.255.252
 service-policy input international
 no ip route-cache cef
 map-group atm-map1
 atm sonet stm-1
 atm pvc 333 10 102 aal5snap
 no atm ilmi-keepalive
!

Any advice / assistance would be appreciated.

regards,
*Eugene van der Merwe *
Founder & CEO

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