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F-15 Does not receive ARP packets

asked 2011-11-10 10:24:39 +0000

ksarka gravatar image

Hello, I have a FreeBSD server connected to Fedora 15 box. The problem is, that F-15 box does not get any ARP packets and does not update it's ARP table. The tcpdump also does not produce any output. When I try pinging from F-15 box to my FreeBSD server, tcpdump listening on both end interfaces, the FreeBSD tcpdump output:

23:06:45.799515 ARP, Request who-has 172.16.1.1 tell fedora, length 46
23:06:45.799535 ARP, Reply 172.16.1.1 is-at f6:64:d1:d8:4f:5d (oui unknown), length 28

Fedora doesn't produce any tcpdump output and does not catch any other than the transmitted packets, so I suppose it drops the acknowledgement packets upon receive. Also, FreeBSD updates it's arp table, fedora does not and it looks like this:

BSD (172.16.1.1) at <incomplete> on p21p1

Any ideas how to fix this problem?

Thank you for your time.

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answered 2011-11-10 11:56:08 +0000

Vaidas Jablonskis gravatar image

Can you check

cat /proc/sys/net/ipv4/conf/p3p1/arp_*

Also please be more specific on how you have your two hosts connected? Do you use a switch?

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Asked: 2011-11-10 10:24:39 +0000

Seen: 705 times

Last updated: Nov 10 '11