877W and O2 (after recent changes)

[KiloBravo]

Hi,

Can't get my router to work with the new settings that o2 have supplied/applied. It was a static IP but I've had them change it back to dynamic to see if maybe I can get it working with that. Below is the config I currently have though I have tried various other tweaks:

!

bridge irb

!

!

interface ATM0

mac-address [MAC of o2 box]

no ip address

no atm ilmi-keepalive

dsl operating-mode auto

!

interface ATM0.1 point-to-point

ip address dhcp

ip access-group OUT-IN in

ip nat outside

ip virtual-reassembly

atm route-bridged ip

pvc 0/101

  oam-pvc manage

  encapsulation aal5snap

!

At present the ATM interface comes up as does the sub interface, but it doesnt receive an IP address. It works with the o2 box without an issue. These are the seetings that O2 give for this new connection:

http://www.o2help.co.uk/broadband-settings/

I did a debug on the ATM and I get this repeatedley:

*May  9 04:06:12.751: ATM0:atmsar_oam_enqueue_vc,pak = 0x82C7838C

*May  9 04:06:12.751: atmsar_vc_tx_start(82EBC574).

*May  9 04:06:12.751: atmsar_transmit_pak_wrapper: deq(82C7838C). vcd: 2.

*May  9 04:06:12.751: atmsar_transmit_pak_wrapper : encap = Raw

*May  9 04:06:12.767: atmsar_raw_rcv: pak->if_input = 0x82EBD100,

          pak->if_input->hwptr = 0x82EBC574 encap = 0x0ip int

Any idea what else I can try?

Thanks.

[mfurnival]

What does your ACL called OUT-IN do?

Could it be a PPP authentication issue? Do a "debug ppp authentication" and reset the interface.

[KiloBravo]

ip access-list extended OUT-IN

deny   tcp any any

deny   udp any any

deny   icmp any any

deny   ip any any

denies any outside sourced traffic in , I had this on there before the network change and it worked fine.

have run a debug PPP authentication and negotiation, but it returns nothing, I dont believe it even gets to that stage.

[mfurnival · Accepted solution]

Are you sure about that ACL? To me that looks like it would deny any IP packet inbound on the interface.

[paulstone80 · Accepted solution]

Try removing the ACL from the ATM sub-interface and see if the issue persists.

HTH

Paul



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[KiloBravo]

I just noticed that deny   ip any any at the bottom of the ACL after i pasted it in! I dont even remember typing that in there. That must be it! will remove it when i get home and report back.

Thanks in advance, i'm 99% sure thats been the cause of all my problems.

[KiloBravo]

All working. Silly me, was fixated on the ATM settings and missed something as basic as that.

Thanks for that guys.