Problem: Device discovery fails because of exceeded ARP cache
ARP cache and /var/log/messages
When an NFM-P system manages a large number of NEs in a broadcast domain, the ARP cache on a main server station may fill and prevent the discovery of additional devices. When this happens, the /var/log/messages file contains entries like the following:
Jan 21 09:37:40 hostname kernel: Neighbour table overflow |
Jan 21 09:37:40 hostname kernel: Neighbour table overflow |
Jan 21 09:37:40 hostname kernel: Neighbour table overflow |
Jan 21 09:38:00 hostname kernel: __ratelimit:190 callbacks suppressed |
Perform this procedure when one of the following occurs:
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The /var/log/messages file contains more than 1024 entries like the example entries above.
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You need to increase the ARP cache size to accommodate the network.
The default ARP cache threshold values are the following: