Very Computer

by **Christopher Hinto** » Thu, 10 Aug 2000 04:00:00

About once every month, my network in my office goes down. Its not the
entire network really just our unix boxes. We have 8 machines that run unix
and all services go down on them . What i mean by services is that a
program called "whats up" tell us that http, ftp, telnet smtp, pop3 all are
not responding. The funny thing is that from outside the network we can
connect fine and it seems as if there are no problems. I have checked
cabling and and hubs. Some people have been telling me its a DNS problem
but i restarted it. I can ping all the boxes fine, everything is just
laggy. Any suggestions??

Also, to see what my network looks like just visit the site:
http://slacker.smartconnect.net/smartconnectlan.jpg

Slacker is one of our unix boxes here at the office, so you might be able to
see what i mean about connecting from the outside. It took at least 5 mins
for me to connect to it in order to ftp!!

by **David Efflan** » Fri, 11 Aug 2000 04:00:00

>About once every month, my network in my office goes down. Its not the
>entire network really just our unix boxes. We have 8 machines that run unix
>and all services go down on them . What i mean by services is that a
>program called "whats up" tell us that http, ftp, telnet smtp, pop3 all are
>not responding. The funny thing is that from outside the network we can
>connect fine and it seems as if there are no problems. I have checked
>cabling and and hubs. Some people have been telling me its a DNS problem
>but i restarted it. I can ping all the boxes fine, everything is just
>laggy. Any suggestions??

> Also, to see what my network looks like just visit the site:
>http://slacker.smartconnect.net/smartconnectlan.jpg

>Slacker is one of our unix boxes here at the office, so you might be able to
>see what i mean about connecting from the outside. It took at least 5 mins
>for me to connect to it in order to ftp!!

If "whats up" tells you services are down, but you can still access those
services, maybe there is a problem with your reporting program instead of
the network. If you run it from cron (or CGI), does it check if itself is
already running before attempting to run? Maybe your reporting program
chokes or bogs down the network if more than one copy of it runs at the
same time, either due to lack of file locking or attempting to check the
same service at the same time.

With a background cron script that I use to check online status of ftp
sites (which can take awhile), I simply exit if it is already running.

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Very Computer

network latency only affecting unix

network latency only affecting unix

network latency only affecting unix