Neighbour table overflow

Linux Advanced Routing and Traffic Control

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hi all,

i am getting a lot of neighbour table overflow in my syslog file...
we use slavkware8.1 with kernel2.4.19 squid2.5s1 iptables1.2.7a & iproite-ss020116.. there are two providers & this box has 5 ethernet and i havent seen it handle going less that 2.5mb traffic even at off peak hours !.. the kernel was _NOT_ configured with arp daemon support..
Dec 7 09:11:32 ICG last message repeated 2 times
Dec 7 09:11:34 ICG kernel: NET: 9 messages suppressed.
Dec 7 09:11:34 ICG kernel: Neighbour table overflow.
Dec 7 09:11:39 ICG kernel: NET: 21 messages suppressed.
Dec 7 09:11:39 ICG kernel: Neighbour table overflow.
Dec 7 09:11:44 ICG kernel: NET: 20 messages suppressed.
Dec 7 09:11:44 ICG kernel: Neighbour table overflow.
Dec 7 09:11:49 ICG kernel: NET: 23 messages suppressed.
Dec 7 09:11:49 ICG kernel: Neighbour table overflow.
Dec 7 09:12:16 ICG kernel: NET: 23 messages suppressed.
Dec 7 09:12:16 ICG kernel: Neighbour table overflow.
Dec 7 09:12:18 ICG last message repeated 4 times

what causes this to happen ?... what is the size of neigh tables? ..can we increase the default size of neighbour table ?

thanking in advance...
A.H

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