Just out of curiousity, if you clear the counters on the atm and bvi
interfaces when this happens, do you see atm incrementing and bvi at a
standstill? We were getting similar "stalls" under 12.0.5T, and moving to
12.0.7T took care of it...
Charles
| Charles Sprickman | Internet Channel
| INCH System Administration Team | (212)243-5200
| spork@inch.com | access@inch.com
On Sat, 21 Oct 2000, Steven Saner wrote:
> I am haveing some strange issues with ADSL service provisioned on a
> 7206 with a PA-A3 ATM interface.
>
> Router: 7206 (non VXR)
> IOS: 12.0(2)XE1
> ATM interface: PA-A3 Hardware rev 2.0
>
> Below I have an example of a typical configuration that we have been
> using now for about 9 months. It is a fairly simple bridged, non PPP
> configuration. It has been working well for us up until about a week
> or so ago. Since that time customers have complained of periodic and
> fairly brief outages. I have been able to reproduce the problem on my
> own DSL circuit, but the exact symptoms are very inconsistant. At
> times it seems that I have only partial connectivity. Specifically, I
> can not pass any UDP traffic, so I can't traceroute to a remote site,
> and I can't do DNS lookups, but I can ping or make TCP connections to
> the remote site. At other times I loose IP connectivity completely.
>
> There are no errors recorded on the PA-A3 interface. In fact I see no
> errors anyplace. The ATM subinterface stays up and shows packets
> comming and going. The bridge table seems to remain in tact. It is
> kind of like the bridged to routing mechanism breaks.
>
> In an attempt to fix the problem, I have tried to upgrade the IOS on
> the router to 12.0(13)S. However, with that IOS, the ADSL config
> doesn't work at all. All of the interfaces look fine, the bridge looks
> okay, but absolutely no IP connectivity what-so-ever. We are also
> using the PA-A3 for a number of frame-relay circuits and they work
> fine in either IOS. I have heard no complaints from any of those
> customers.
>
> So my questions are:
>
> 1. Is there any idea what is causing the periodic outages?
>
> 2. Why with the 12.0(13)S IOS does the ADSL configuration not work at all.
>
>
> Below is a typical configuration for the ADSL service. Am I missing
> something that is causing one of the problems listed above.
>
> Thanks for your help
>
>
> bridge 2 protocol ieee
> bridge 2 route ip
>
>
> interface ATM6/0.3001 point-to-point
> mtu 2048
> no ip directed-broadcast
> no ip proxy-arp
> no ip mroute-cache
> atm pvc 3001 3 35 aal5snap 1536 1536
> bridge-group 2
> bridge-group 2 spanning-disabled
>
>
> interface BVI2
> mtu 3000
> ip address 206.53.96.18 255.255.255.252
> no ip directed-broadcast
>
>
> --
> ==================================================================
> Steven Saner SouthWind Internet Access, Inc.
> ssaner@southwind.net Systems/Network Administrator
> http://www2.southwind.net/~ssaner http://www.southwind.net
> 263-7963 Wichita (800)525-7963
>
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