Re: at-ws.ten-34.net instabilities, nmc@localhost

["Michael H. Behringer" <]

Hi Felix!

Just now I've upgraded both at-ws.ten-34.net and ch-ws to
mrouted.3.9-beta3. I know it's not the best of ideas to do such work on a
Friday afternoon, but given the current instabilities it can hardly get
worse. The tunnel to you (CERN) went up and down several times this
afternoon :-(

Currently all tunnels from and to these machines are up. Let's watch it for
some time. 

Michael


At 15:00 27/03/98 +0100, Felix Kugler wrote:
>Michael,
>
>> For your information: Over the last days we have experienced several times
>> that mrouted dies (core dumped) on the at-ws.ten-34.net. Also, at times
>> tunnels appear to be down for some time, without obvious reason. The
>> mrouted version is currently 3.9-beta2. The whole set-up is exactly the
>> same as on the other TEN-34 mrouteds, which have no problem (knock on
>> wood). We will try upgrading to the new beta3 after the IETF. Any other
>> ideas: Please let us know ;-)
>
>that's probably a good move, we too experienced core dumps of
>mrouted3.9b2, Simon was even able to find one of the bugs in the code
>which caused the crash. According to Bill Fenner this has been fixed
>and we indeed did not get any crashes of mrouted since the upgrade to
>3.9b3.
>
>> PS: Yesterday the CH-WS went down hard (no telnet possible anymore) twice,
>> too, which is probably not related to mrouted, but will have had effects on
>> the mbone as well. 
>
>I'm afraid it is. Unfortunatly, we notice this behaviour quite
>frequently, especially yesterday and this morning on all our three
>mrouted's in Geneva, Zuerich, and Lausanne. Often the machines seem to
>freeze for 20..30 seconds and come to live again, sometimes they simply
>hang forever. The freeze periods begin after short periods of very
>high CPU load (nice to watch with "iostat -5"). Traffic seems to peak
>too during these periods. 
>
>Anybody else getting these problems ?
>
>Felix
>
>-----------------------------------------------------------------------------
>Felix Kugler                                     | email: kugler@localhost 
>SWITCH - The Swiss Academic and Research Network | Phone: +41 1 268 15 30 
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