home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!dtix!darwin.sura.net!mips!mips!bdcsys!news
- From: hank@bcstec.ca.boeing.com (Lisa Henry)
- Newsgroups: comp.sys.concurrent
- Subject: Need help with networking problem on unix Concurrent machine.
- Message-ID: <3309@bcstec.ca.boeing.com>
- Date: 13 Aug 92 23:06:21 GMT
- Sender: news@bdcsys.suvl.ca.us
- Organization: ncurrent-request
- Lines: 56
- Approved: concurrent-request@bdcsys.suvl.ca.us
-
-
- I'm having trouble with a networking problem involving several
- test stations running with a Concurrent computer (UNIX/6.1)
- (the man pages footer says AT&T SYSV.2 and 4.2BSD),
- networked between two subnets (ethernet), with several X-terminals
- connecting to them over the network.
-
- The problem is that periodically (on some nodes once to twice
- a day) the ARPA network services on these nodes gets 'hung', for
- lack of a better word. These are the symptoms:
-
- 1. I am not able to remote connect to a node that is 'hung' from
- one that is running okay by means of telnet, ftp, rsh, or
- rlogin.
-
- With ftp and telnet, the initial connection is made:
-
- % telnet hung_node
- Trying...
- Connected to hung_node.
- Escape character is '^]'.
-
- but nothing happens after that. Similarly with ftp:
-
- % ftp hung_node
- Connected to hung_node.
-
- and again no response after that.
-
- Also, when the system is hung up, X-terminals are not
- able to download server code from it. They are using
- tftp to transfer the server files.
-
- 2. I *can* execute these utilities from the hung_node to other
- systems that are running okay. Works just fine.
-
- 3. The above symptoms led me to think that the netd process
- was somehow locked up, so I tried to kill it. It won't
- die. No option to kill has worked so far.
-
- 4. The only solution so far has been to reboot the machine,
- which stops and restarts the netd process, and then
- everything runs just fine.
-
- The problem is that I can't just reboot the machine every
- time this happens. There are users running from X-terminals
- and dumb-terminals all over, and I can't just keep
- interrupting their work.
-
- So I need a less drastic solution than rebooting. Anyone have
- any ideas? Any help would be appreciated.
- --
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- ~ Lisa Yvette Henry * System Administrator
- ~ root@hp750_s1.ds.boeing.com * Status: Babe in the woods...
- ~ hank@bcstec.ca.boeing.com * "Wow, look at all these toys!"
-