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Carol, > The upstream LDM is running 6.11.1 Then the IS_ALIVE feature will work. > Is there a check version command in LDM? I'm just guessing based on > what's in the /home/ldm directory. The command "ldmadmin config | grep version" will tell you the LDM version. > Is it possible there are some computer settings that need to be changed? > I had talked with TC at SSEC at UW-Madison about this and they ended up > changing the following on the downstream host. > > "I changed the tcp keepalive parameters. The default was set to 7200 > seconds, which is 2 hours. I changed this to 600 seconds (10 minutes). > It should also more quickly detect failed connections." Nice idea. It should be irrelevant, however, due to the IS_ALIVE mechanism in the LDM, itself. If you're logging at the verbose level (i.e., INFO), then you should see messages in the LDM log file like "Connection from upstream LDM silent for %u seconds" and "Upstream LDM is alive. Waiting..." (if the upstream LDM is still online) and "Upstream LDM died: pid=%u" or ""Connection to upstream LDM closed: pid=%u" (if it's not). What do you see in the downstream LDM's log file? Regards, Steve Emmerson Ticket Details =================== Ticket ID: BQD-554715 Department: Support LDM Priority: Normal Status: Closed =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.