arp entries for local interfaces disappearing ?

[Ion-Mihai Tetcu]

On Wed, 7 Apr 2004 10:57:48 -0700
Luigi Rizzo <luigi at freebsd.org> wrote:

> Can someone explain why, in my arp table, i don't have an
> entry for my local machine ? I just noticed this by chance,
> on my 4.9 box at the office, and now again at home:
> 
>     > ifconfig
>     rl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> 	    inet 10.0.1.55 netmask 0xffffff00 broadcast 10.0.1.255
> 	    inet 10.1.1.236 netmask 0xffffff00 broadcast 10.1.1.255
> 	    ether 00:40:f4:34:b1:4b
> 	    media: Ethernet autoselect (100baseTX <full-duplex>)
> 	    status: active
>     lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
> 	    inet 127.0.0.1 netmask 0xff000000 
>     > arp -na
>     ? (10.0.1.52) at 00:02:2d:08:a3:3b on rl0 [ethernet]
>     ? (10.0.1.64) at 52:54:05:de:99:7c on rl0 [ethernet]
>     > 

Same here, on a -current. 

 # arp -n 192.168.0.10
192.168.0.10 (192.168.0.10) -- no entry

 # arp -an
? (192.168.0.1) at 00:e0:4c:55:c3:13 on rl0 [ethernet]
? (192.168.0.255) at ff:ff:ff:ff:ff:ff on rl0 permanent [ethernet]

 # ping 192.168.0.10
PING 192.168.0.10 (192.168.0.10): 56 data bytes
64 bytes from 192.168.0.10: icmp_seq=0 ttl=64 time=4.307 ms
64 bytes from 192.168.0.10: icmp_seq=1 ttl=64 time=0.113 ms
^C
--- 192.168.0.10 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.113/2.210/4.307/2.097 ms

 # arp -an
? (192.168.0.1) at 00:e0:4c:55:c3:13 on rl0 [ethernet]
? (192.168.0.10) at 00:0d:61:b3:6f:9d on rl0 permanent [ethernet]
? (192.168.0.255) at ff:ff:ff:ff:ff:ff on rl0 permanent [ethernet]

 # sysctl net.link.ether.inet
net.link.ether.inet.prune_intvl: 300
net.link.ether.inet.max_age: 1200
net.link.ether.inet.host_down_time: 20
net.link.ether.inet.maxtries: 5
net.link.ether.inet.useloopback: 1
net.link.ether.inet.proxyall: 0
net.link.ether.inet.log_arp_wrong_iface: 1
net.link.ether.inet.log_arp_movements: 1


-- 
IOnut
Unregistered ;) FreeBSD "user"