Matthew Roessner
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IBM i Connectivity Issues
We have an odd issue on one of our IBM i servers. It appears that every Thursday at 5:00 PM - our hand held devices lose connectivity to our IBM i server. It looks like our services go up and down for about 20 minutes and then stabilize. If I look at QHST - I see that there are a lot of devices disconnecting - but i don't see the IBM i actually being unresponsive - but I don't know that for sure.
I was wondering if there was any detailed logs somewhere related to TCP/IP that I could look to verify if the server actually lost connectivity during that timeframe or if OTHER devices connected to it lost the connectivity. I have included a couple of snapshots of the logs...to show what I am seeing around that 17:00 PM timeframe.
I was wondering if there was any detailed logs somewhere related to TCP/IP that I could look to verify if the server actually lost connectivity during that timeframe or if OTHER devices connected to it lost the connectivity. I have included a couple of snapshots of the logs...to show what I am seeing around that 17:00 PM timeframe.
ASKER
Thanks for the suggestions. We will go down that road...
Is there any way on the IBM i side of things that we could look to see if network connectivity was lost for a given time period? We searched through QHST - but I didn't know if there was anything else we could look at to verify the network connectivity
Is there any way on the IBM i side of things that we could look to see if network connectivity was lost for a given time period? We searched through QHST - but I didn't know if there was anything else we could look at to verify the network connectivity
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Do any other IP devices lose connections during this period.
Is the R2 timer message above associated with a handhelp connection? Message indicates that a connection has been opened, and that some IBM i program is attempting to re-send TCP PDUs to a remote device, and that the expected response is not received. The TCP stack continues to try to deliver the PDU a fixed number of times (16 times by default), and finally gave up and threw the TCP2617 message.
Note the direction: this is a problem sending from IBM i to the handheld device(s). I'd start my troubleshooting at the handhelds. During this period, can you PING from the handhelds to the IBM i? How about another device on the same network? Can you ping from the IBM i to one of the handhelds?