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Date:      Tue, 16 Jan 2001 18:18:17 +0100
From:      Len Conrad <LConrad@Go2France.com>
To:        freebsd-net@freebsd.org
Subject:   arp bp's
Message-ID:  <5.0.2.1.0.20010116180407.056deda0@mail.Go2France.com>

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We have a FreeBSD 3.1R machine as our main router uplinking to a 
Cisco 3620 (back to back, no switch).

All works well, and had for months. After a reboot of cisco and 
freebsd, all still works well, but we cannot ping cisco inside to 
fbsd outside (the back to back interfaces with x-over cable), plus 
when we traceroute up to internet, all we get is * * * when 
traversing that link, followed by normal traceoute behavior.

This link carries several a gigabyte of traffic a day in both 
directions without pb's, but we have this problem with that link.

dmesg shows tons of:

arpresolve: can't allocate llinfo for 255.255.255.252rt
arplookup 255.255.255.252 failed: host is not on local network
arpresolve: can't allocate llinfo for 255.255.255.252rt
arplookup 255.255.255.252 failed: host is not on local network
arpresolve: can't allocate llinfo for 255.255.255.252rt


and /var/log/messages shows:

Jan 16 18:03:49 gw1 /kernel: arplookup 255.255.255.252 failed: host 
is not on local network
Jan 16 18:03:49 gw1 /kernel: arpresolve: can't allocate llinfo for 
255.255.255.252rt
Jan 16 18:03:51 gw1 /kernel: arplookup 255.255.255.252 failed: host 
is not on local network
Jan 16 18:03:51 gw1 /kernel: arpresolve: can't allocate llinfo for 
255.255.255.252rt
Jan 16 18:03:52 gw1 /kernel: arplookup 255.255.255.252 failed: host 
is not on local network
Jan 16 18:03:52 gw1 /kernel: arpresolve: can't allocate llinfo for 
255.255.255.252rt

255.255.255.252 is of course not an ip address but a netmask on the 
two of the 3 xl0 cards in that machine.

ifconfig -a shows nothing strange

stumped

Len



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