[nsp] RE: OK I'm Stumped!!!!

[Stephen J. Wilcox]

I'm not checking this but..

Try altering the init string (modemcap) .. theres probably options for header 
compression in one of the S registers, this would be preferable than config'ing 
it in the interface as it should ensure the modems negotiate in the expected 
manner

Steve

On Tue, 8 Jun 2004, Melvin C. Etheridge wrote:

> OK!!!!! PROGRESS!!!!!
> 
> It seems to be a IP Header Compression issue
> 
> If I turn it off on my home computer it works....turn it on I cannot view
> web pages...
> 
> I HAVE NO ENTRIES in my 5300 for header compression....
> 
> How can I disable it and make it STICK!!!
> 
> Mel
> 
> ----- Original Message ----- 
> From: "Melvin C. Etheridge" <mele at enia.net>
> To: <cisco-nsp at puck.nether.net>
> Sent: Monday, June 07, 2004 11:25 PM
> Subject: Re: [nsp] RE: OK I'm Stumped!!!!
> 
> 
> > Let me add that this is only affecting about a couple dozen customers.
> >
> > If they bring their system in to our office we can dial up and surf fine.
> >
> > If we go out to the customers premises with our laptop sometimes it works
> > and sometimes we get the same error.
> >
> > Customers can surf for about 10-15 minutes.  Then "page cannot be found".
> > Also I can have customer ping a IP and get all replies back...I can have
> > them ping www.yahoo.com and get all replies back.....but the cannot browse
> > check or send email or use AOL IM or MSN IM.
> >
> > Also,  Everything seemed to be fine earlier this evening and now has
> stated
> > going down hill over the last hour or so....
> >
> > Like I said....
> >
> > THIS IS DRIVING ME CRAZY!!!!!!
> >
> > Mel
> >
> > ----- Original Message ----- 
> > From: "Stephen J. Wilcox" <steve at telecomplete.co.uk>
> > To: "Melvin C. Etheridge" <mele at enia.net>
> > Cc: <cisco-nsp at puck.nether.net>
> > Sent: Monday, June 07, 2004 5:47 PM
> > Subject: Re: [nsp] RE: OK I'm Stumped!!!!
> >
> >
> > > Not if you can ping
> > >
> > > What I'd do next.. find a nearby server you control that they can ping
> but
> > cant
> > > browse a web page on.. run tcpdump or equiv on that box
> > >
> > > Now try ping using increasing packet sizes, see what size they stop
> > working at
> > > (if they stop working).
> > >
> > > Try opening a webpage on the server and record the tcp connection
> > >
> > > For ping, tcpdump should help you work out in which direction the
> problem
> > lies
> > > (ie you receive the icmp echo but the dialup doesnt report the echo
> > reply).
> > >
> > > For the webpage, a successfull handshake and get request then a stall
> > shouts mtu
> > > issues.
> > >
> > > Are you doing anything else on the as5300/nearby routers to do with
> > wccp/web
> > > caching, policy/source routing?
> > >
> > > Steve
> > >
> > > On Mon, 7 Jun 2004, Melvin C. Etheridge wrote:
> > >
> > > > THIS IS STILL DRIVING ME CRAZY!!!!!
> > > >
> > > > Could this be a routing issue?
> > > >
> > > > Help?!!!
> > > >
> > > > Mel
> > > >
> > > > ----- Original Message ----- 
> > > > From: "Jon Lewis" <jlewis at lewis.org>
> > > > To: <cisco-nsp at puck.nether.net>
> > > > Sent: Saturday, June 05, 2004 4:44 PM
> > > > Subject: Re: [nsp] RE: OK I'm Stumped!!!!
> > > >
> > > >
> > > > > On Sat, 5 Jun 2004, Martinez, Edwin II (contractor) wrote:
> > > > >
> > > > > > I would have to agree with Andrew's gut feeling, that it is MTU
> > related.
> > > > > > However, it won't be that easy.
> > > > >
> > > > > IIRC, several years ago, I set the framed-MTU in our default radius
> > > > > profile to 1500.  Many windows users were able to connect, but not
> > surf.
> > > > > It seems they really wanted to negotiate the MTU.  If you're setting
> > MTU
> > > > > via radius, try removing that from your default profile.
> > > > >
> > > >
> > ----------------------------------------------------------------------
> > > > >  Jon Lewis                   |  I route
> > > > >  Senior Network Engineer     |  therefore you are
> > > > >  Atlantic Net                |
> > > > > _________ http://www.lewis.org/~jlewis/pgp for PGP public
> key_________
> > > > > _______________________________________________
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> >
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