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- Path: sparky!uunet!charon.amdahl.com!amdahl!kjb
- From: kjb@uts.amdahl.com (Kevin J. Barth)
- Newsgroups: comp.sys.next.sysadmin
- Subject: NeXT intermittently hangs on the network
- Keywords: netork netinfo heterogenous hang NIS
- Message-ID: <dfhR03OR80a100@amdahl.uts.amdahl.com>
- Date: 11 Sep 92 19:31:21 GMT
- Organization: Amdahl Corporation, Sunnyvale CA
- Lines: 63
-
-
-
- Environment:
- - NeXTStation Color Turbo, 16MB, 250MB
- - NeXTStep release 2.2 (not extended)
- - On heterogeneous network of 3 NeXTs (all the same) and 2 SUN's (one IPC
- running SunOS Release 4.1.3 (ZONE_FIX), and one old sparkstation 1 running
- SunOS Release 4.1).
- - NeXT's running netinfo and NIS
- - One of the Sun's is the yp server
- - the NeXT that sometimes hangs is a clone netinfo server; but another one
- is also a clone and it doesn't hang.
- - All systems NFS mount each others directories (only each machine's normal
- user's home directories).
- - Thin net.
- - all netmask, broadcast, and IP addresses have been double checked and
- are consistent with each other.
-
-
- One of our NeXT's hangs intermittently. It seems to happen
- when it tries to access the network, be it via an NFS look up or
- even just a ping. When it hangs on a ping, it doesn't display the
- 1st line, ie: "PING crocus: 56 data bytes" until it's ok again. Once
- it shows that, the machine seems to be OK again. This indicates to
- me that it is having trouble looking up the hostname in netinfo
- from the master netinfo and configuration server -- does this make
- sense? (after all, it is a clone, maybe it should just look it up
- locally?)
-
-
- *Sometimes*, when it happens we get:
- Sep 9 21:04:19 panther mach: NFS server (autonfsmount[121]) not responding still trying
- Sep 9 21:04:44 panther mach: NFS server (autonfsmount[121]) ok
-
- .....but not all of the time.
-
-
- *Sometimes*, it comes back in a couple (4 to 15) minutes, but sometimes
- it never does (well, we've gotten tired waiting and rebooted it).
-
-
- .....Generally........:
- On the NeXTs' ping *usually* shows 0% packet loss, but *sometimes* it shows
- around 25%. The SUN's seem to never show any packet loss during a ping.
-
- The SUN's just generally seem to be more resilient. I haven't seem them
- "hang" at all when doing things to the network. An ls to a remote machines
- directory comes back *really* fast, while the NeXTs sometimes
- pause for some time before an ls on a remote filesystem returns. Does
- anybody have an explination of this behavior?
-
-
-
-
- Many thanks in advance to anyone who can help me!!! Please email me
- directly, I will summarize the (very hopeful) solution.
-
- Cheers,
- Kevin
- kjb@uts.amdahl.com
-
-
-
-