Brad,
We've been running AFS over an IBM 8260 ATM switch for a couple of months.
We currently have 6 production and 3 test AFS fileservers on our switch,
all RS/6000s or SP2 nodes. There are a few "special-purpose" clients also
connected to the ATM switch, but most of our general-purpose AFS clients
route to the ATM subnet from other subnets (ethernet, fddi, and an IBM SP2
high-performance switch).
Our experiences to-date with this setup have been excellent. Both the
switch and the RS/6000 ATM adapters have been relatively stable, and
performance has been great. We've not run into any of the AFS problems
that you mentioned (are you still having them?).
Most of our production fileservers are still on a (dedicated) fddi ring,
but given how well ATM seems to be working, we plan to move all of our
servers to the ATM switch within the next few months.
--Judy Warren
Cornell Theory Center
Brad Robertson writes:
>
>
> I'd like to hear about your experiences running AFS over Fore Systems, Inc.
> ATM hardware.
>
> Our cell has three servers (Suns) on ethernet, and I'm trying to get two AFS
> clients (also Suns) working exclusively through their ATM interfaces. The
> clients are using Fore's sbus cards, attached to an ASX-200 switch. The
> ASX-200 connects to an LAX-20, which connects to ethernet.
>
> When the client workstations boot up, everything seems fine at first. I can
> log in on either one of the client machines' console, authenticate
> successfully, and access files in afs with no trouble--for about 30 to 60
> seconds.
>
> After that I get the all too familiar console message about "Lost contact with
> server..." I get permission denied messages for whatever file I'm trying to
> access. The last ls info is still in the local cache at this point. A quick
> ps auxw | grep afsd reveals that afsd has died. Now I've lost it all.
>
> Restarting afsd fails. The kernel module, which was loaded with dkload at boot
> time, has apparently "gone south".
>
> I'm still able to ping other hosts with no packet loss and normal round
> trip times, telnet works, NFS seems to work. Only AFS seems to exhibit this
> problem.
>
> I would be grateful for any advice, pointers, anecdotes, stories, or help you
> may have to offer. Obviously, if I can't get this worked out, I can't put my
> AFS servers on ATM (which seems to be the eventual goal).
>
> -----------------------------------
> Brad Robertson <[EMAIL PROTECTED]>
>
