Ascend Archive
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Re: (ASCEND) MAX 1800 bri prob

On Fri, Aug 15, 1997 at 10:58:28AM -0700, Marc.Shannon@INNOSOFT.COM wrote:
> 
> I guess that you've not seen the performance problems that we have. It was a
> horrible problem to ping the M1800 and get 100% response but pinging a remote
> P75 would get only 65% of the packets back. As you can imagine, telnet
> sessions were quite painful and FTPing files was almost impossible.

Dito. Currently we have a situation where it happens _immediately_. Even
after a reboot of the Max1800. And we have a web site on the other end
where you can repeatedly see how the TCP conn effectively stalls.

And the most strange thing: when disabling Stac on the links, at least
TCP works again without problems.

> Ascend asked us for a packet trace of our Ethernet so they'd get an idea of
> what's going around on the M1800's Ethernet. I sent that to them, but the
> Ascend techs haven't yet come up with any explanation about why the M1800
> performs so poorly.
> 
> One thing that may be helping create the problem is that we do bridging
> entirely... no routing. (Can't route many of the non-IP packets on our
> network.) I assume that others using M1800's are using them for IP routing.

We are doing routing only and see the same. I also have information from
others who see it. Disabling Stac cures it a bit.

This is weird. We actually had customers who thought we are braindead because
we replaced two P400 with one 1800 and their whole production network did
effectively break. No known such problems was what Ascend had to say.
It's the first time I hear about this sync problem, and it really seems
to be what struggles us as well.

Ascend ?

-- 

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