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Community Member

Problems with ADSL WIC on 2621 Router with Pac Bell DSL

I have configured an ADSL WIC card on a 2621 router with the following basic configuration:

interface ATM 0/0

ip address x.x.x.x x.x.x.x (as provide by Pac Bell)

atm vc-per-vp 256 (on by default)

no atm ilmi-keepalive

pvc 0/35 (also provided by Pac Bell)

protocol ip x.x.x.y broadcast (address of "gateway" Pac Bell gave me)

encapsulation aal5snap (they told me they are using RFCc1483)

dsl operating mode auto

no fair queue

This configuration will get the atm interface trained and I get an up/up when I do a show int atm 0/0, so layer 1 and layer 2 seems to be working. Also, when I do debug atm events, and I watch the communications it seems that the router talks gets set up correctly.

My problem is this: I cannot get layer 3 connectivity. I cannot ping the "gateway" or anything beyond it. Even if I do a default route to the address they gave me. I know the line wokrs, because when I replace the Cisco with a Cayman router and just insert the same information into their menus, I get connectivity.

I have no access lists that would be interfering either. What am I doing wrong? I have a 255.255.255.224 subnet for the static IPs they gave me, and I read in an earlier posting that someone was doubtful that it was RFC 1483...I quote "Well you need to be sure about the config of the line..If they have given you the 5 static routable ip address then its hard to belive that its just "RFC1483 Bridging"

Any help????

1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Re: Problems with ADSL WIC on 2621 Router with Pac Bell DSL

Pacbell generally have IRB with RFC1483 bridging OR PPPoE..So try using the config located at following url

http://www.cisco.com/warp/public/794/wicadsl_rfc_irb_nat_1.html

Here is the place which has a sample config for different line config..Pl. locate "cisco ADSL WIC" section

http://www.cisco.com/warp/public/794/

Tejal

2 REPLIES
Cisco Employee

Re: Problems with ADSL WIC on 2621 Router with Pac Bell DSL

Pacbell generally have IRB with RFC1483 bridging OR PPPoE..So try using the config located at following url

http://www.cisco.com/warp/public/794/wicadsl_rfc_irb_nat_1.html

Here is the place which has a sample config for different line config..Pl. locate "cisco ADSL WIC" section

http://www.cisco.com/warp/public/794/

Tejal

Community Member

Re: Problems with ADSL WIC on 2621 Router with Pac Bell DSL

This put me on the right track...my final configuration was similar to this:

bridge irb

!

!

!

interface ATM0/0

no ip address

no ip mroute-cache

atm vc-per-vp 256

no atm ilmi-keepalive

atm voice aal2 aggregate-svc upspeed-number 0

pvc 0/35

encapsulation aal5snap

!

dsl operating-mode auto

no fair-queue

bridge-group 1

interface BVI1

ip address x.x.x.x y.y.y.y

etc.,

etc.,

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