arp fails to clear mapping for deleted network

[Li, Qing]

Please apply the patch at "http://people.freebsd.org/~qingli/patch" and
that should fix your problem.

I found another issue while testing the patch. I am working on it and
hope to have a fix soon.

-- Qing


> -----Original Message-----
> From: owner-freebsd-net at freebsd.org [mailto:owner-freebsd-
> net at freebsd.org] On Behalf Of Nikos Vassiliadis
> Sent: Monday, May 18, 2009 1:44 AM
> To: freebsd-net at freebsd.org
> Subject: arp fails to clear mapping for deleted network
> 
> Hello,
> 
> It seems that:
> 1) if I assign an IP address to an interface
> 2) get an arp mapping via this interface
> 3) remove the IP address from the interface
> 
> arp fails to remove this arp entry when
> arp -d is used
> 
> > lab# ifconfig rl0 192.168.254.30
> > lab# ping 192.168.254.254
> > PING 192.168.254.254 (192.168.254.254): 56 data bytes
> > 64 bytes from 192.168.254.254: icmp_seq=0 ttl=64 time=0.427 ms
> > 64 bytes from 192.168.254.254: icmp_seq=1 ttl=64 time=0.434 ms
> > 64 bytes from 192.168.254.254: icmp_seq=2 ttl=64 time=0.442 ms
> > 64 bytes from 192.168.254.254: icmp_seq=3 ttl=64 time=0.467 ms
> > 64 bytes from 192.168.254.254: icmp_seq=4 ttl=64 time=0.445 ms
> > ^C
> > --- 192.168.254.254 ping statistics ---
> > 5 packets transmitted, 5 packets received, 0.0% packet loss
> > round-trip min/avg/max/stddev = 0.427/0.443/0.467/0.014 ms
> > lab# arp 192.168.254.254
> > ? (192.168.254.254) at 00:18:d1:e4:ee:29 on rl0 [ethernet]
> > lab# ifconfig rl0 delete
> > lab# arp 192.168.254.254
> > ? (192.168.254.254) at 00:18:d1:e4:ee:29 on rl0 [ethernet]
> > lab# arp -d 192.168.254.254
> > arp: writing to routing socket: No such process
> > arp: 192.168.254.254: No such process
> > lab# arp 192.168.254.254
> > ? (192.168.254.254) at 00:18:d1:e4:ee:29 on rl0 [ethernet]
> > lab#
> 
> This is from a few days old -current. I just noticed
> this somehow strange behavior, but I don't really know
> if it's old or new.
> 
> Nikos
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