[cisco-bba] about Cisco 7206VXR + PA-A6-OC3SMI

Frank Bulk frnkblk at iname.com
Thu Sep 25 02:37:22 EDT 2008

>From the Cisco docs:


RFC 1483 Bridging Implementations 

Select one of these RFC 1483 bridging implementations for your Asymmetric
Digital Subscriber Line (ADSL) service. 

*	Integrated
le09186a008071a5d0.shtml>  Routing and Bridging (IRB) -(Recommended) The IRB
feature allows your Cisco DSL Router to bridge traffic in on its ATM
interface (the ADSL interface) and then route that traffic out on its
Ethernet interface. With IRB enabled, the Cisco DSL Router can perform
value-added services such as Network Address Translation (NAT) overload, NAT
Pool, Static NAT, and Dynamic Host Control Protocol (DHCP) Server. 
*	Pure
le09186a008071a88e.shtml>  Bridging -In a Pure Bridging implementation, your
Cisco DSL Router acts as a simple ADSL to Ethernet bridge, and is unable to
provide value-added services. 

I think you want to do IRB..


Here's an example:






From: cisco-bba-bounces at puck.nether.net
[mailto:cisco-bba-bounces at puck.nether.net] On Behalf Of Matteo
Sent: Wednesday, September 24, 2008 3:05 PM
To: Doug McIntyre
Cc: cisco-bba at puck.nether.net
Subject: Re: [cisco-bba] about Cisco 7206VXR + PA-A6-OC3SMI


> PPPoA only can run over an ATM PVC. This works fine for an ATM setup,
> CPE talking out its ATM PVC to the DSLAM hooked up via ATM back to the
> ATM cloud and back down to your LNS/termination box. But it doesn't
> work when you do things differently.


My ISP connect to by PA-A6-OC3SMI, and it tell me an ATM PVC to every
cutomer, so I can use PPPoA


Now I think to start is most friendly use RFC1483, but I don't know if I
could use routed or bridge....???


in my country the most big telco use RFC1483 but I don't see never our side
but only customer site and I configure connction using this:


interface ATM0
 no ip address
 no atm ilmi-keepalive
 dsl operating-mode auto 
interface ATM0.1 point-to-point
 bandwidth 2048
 ip address XXX.XXX.XXX.XXX
 pvc 8/35 
  oam-pvc manage
  oam retry 5 5 1
  encapsulation aal5snap


Now I would configure my customer with this example but I don't configure
never other side..... can you send me some example ??

This is is RFC1483 routed or bridge ??


Thank you



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