[AG-TECH] multicast cycling issue

[Jimmy Miklavcic]

Monika,

If it's every 3 minutes or so, you are experiencing a router pruning
issue. This usually occurs when your outgoing traffic takes a different
path than the incoming traffic. The routers don't see any
acknowledgement on the primary path so it prunes the route. Three
minutes later it gets reestablished. We found this here in Utah. Our
outgoing traffic used I2 and the incoming traffic came through NLR. We
had to block the traffic on NLR to fix this. You'll need to get your
network staff involved.   

Jimmy

 -- 
Jimmy Miklavcic 
Multimedia Specialist 
Jimmy.Miklavcic at utah.edu 

UNIVERSITY OF UTAH 
CTR FOR HIGH PERFORM COMPUTING 
155 SOUTH 1452 EAST RM 405 
SALT LAKE CITY, UT 84112-0190 

Office: 801.585.9335 
 Fax: 801.585.5366 

http://www.anotherlanguage.org 


-----Original Message-----
From: owner-ag-tech at mcs.anl.gov [mailto:owner-ag-tech at mcs.anl.gov] On
Behalf Of monika.k.rabarison at jsums.edu
Sent: Wednesday, March 12, 2008 9:58 AM
To: ag-tech at mcs.anl.gov
Subject: [AG-TECH] multicast cycling issue

Hello All,

We have been having a multicast "cycling on and off" issue since
January.
I wonder whether anyone has experienced or is experiencing a similar
issue.
We are located in Jackson, Mississippi.

Thanks for any insight,

Monika