Unexpected Disconnects


Subject: Unexpected Disconnects
From: brendan bowden (brtb@technologist.com)
Date: Tue Mar 28 2000 - 12:07:35 EST


[Sorry if anybody's on the linux-atalk list and has already seen this, just
thought somebody here might have some ideas]

The Mac lab I'm in charge of has a really annoying problem... on a seemingly
random basis, my Macs pop up with a "Server has unexpectedly disconnected"
message. Happens on both TCP/IP and Appletalk logins, and OSes 8.5-9.0.4.

[warning: boring tech specs and stuff below]
Hardware: computers from PowerMac 5500/225's to G4's and everything in
between, mostly OS 9.0.4 but a few 8.5.x's in there; average 10-15 connected
to the server at a time. Same error message on all setups.

Server: far from being overloaded - Athlon Tbird 750, 2 3Com PCI NICs, 30gb
IDE hard drive, 128meg RAM, Slackware7.1 with
netatalk1.4.99-20001108 (but the supplied +asun2.1.3 and a pre37 compile
have the same problem). The 3com NICS seem to work great otherwise but I
tested a few junky RTL8139's and even some ISA NE2000's just to be sure - to
the same effect.

Network: The Macs are connected to 2 Cisco Catalyst 1900 10baseT switches,
linked to nothing but each other. The server has a NIC linked to this
mini-network and the other NIC plugged into the main school network (both
server ports are runing at 100mbit), ipmasq applenet->schoolnet setup and
working fine. Yeah, I could just link into schoolnet but I didn't think the
Macs wanted to see 30 million SMB broadcasts per second, and it gives me
more security/logging power for internet routing to the lab.

I thought this setup would work fine... am I missing some weird setting that
needs tweaking or what?

-- brendan



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