In my system, RNRP monitor shown, most of node primary is down, frequently there are up and down. I have checked all phisical connection of my networks but still didn't find problem reasons.
Please advice me Gents? What I need to check?
Attach the log file which you find under either:
- C:\Program Files\Common Files\...ABB...\log\RnrpEvent.log
Few known issues exist that can explain this behaviour.
- In versions prior RNRP 3.18 *entire* networks (=path) could be incorrectly reported "down" and in the next few seconds "up" again. If you see cyclical "netw up/down" in RNRP monitor/log, you may be affected by this problem. Contact regional ABB to receive a patch.
- With VMware and 800xA *prior* version 6; virtual network adapters shall be using the E1000 network adapter type instead of VMXNETx.
Other than the above I suspect hardware/network fault, eg:
- RNRP detects and will try to prevent network loops by temporarily blocking one or more network ports. This blocking may be interpreted as unexpected ups/downs. Use RNRP Fault Tracer/Utility to "1) Search own networks for nodes with errors". If this report contain "loop detected" you must resolve what is looping telegrams in your network. Eg a bad fiber link in eg a Hirschmann HIPER or Westermo FRNT ring. Check switch logs for records of ring break/repair coinciding with RNRP losses.
RNRP traffic is quite easy to trace with a network analyzer, eg Wireshark - try recording "UDP port 2423" in the troublesome machine. Each distant node must be seen once per second. Three misses (=3 seconds) from eg 172.16.4.11 (AS1 in default IP scheme) will cause this node's RNRP to say "172.16.4.11 down".
Try tracking where these messages go lost
Don't hesitate to contact your regional ABB support team.