ARP Messages

Mächler Philippe pmaechler at glattnet.ch
Tue Feb 26 12:27:08 UTC 2008


Hello,

I have some strange messages on a FreeBSD 5.4 Server
The system has a private ip on bge1 and a public one one bge0

Every 2-3 seconds i get an entry like these...
> arp: 80.242.192.81 is on bge0 but got reply from
00:19:bb:25:7b:63 on bge1
> arp: 80.242.192.81 is on bge0 but got reply from
00:19:bb:25:7b:63 on bge1
> arp: 80.242.192.81 is on bge0 but got reply from
00:19:bb:25:7b:63 on bge1
> arp: 80.242.192.80 is on lo0 but got reply from
00:0e:7f:fe:10:3f on bge1
> arp: 192.168.3.222 is on lo0 but got reply from
00:0e:7f:fe:40:c2 on bge0

The funny thing is, that the ip 80.242.192.80 is on mac
00:0e:7f:fe:10:3f but bge0 and not bge1 
Also the ip adress 192.168.3.222 has 00:0e:7f:fe:40:c2 but on
bge1 instead of bge0

See ifconfig output below...

%ifconfig 
bge0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST>
mtu 1500
        options=1a<TXCSUM,VLAN_MTU,VLAN_HWTAGGING>
        inet 80.242.192.80 netmask 0xffffffc0 broadcast
80.242.192.127
        ether 00:0e:7f:fe:10:3f
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
bge1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        options=1a<TXCSUM,VLAN_MTU,VLAN_HWTAGGING>
        inet 192.168.3.222 netmask 0xffffff00 broadcast
192.168.3.255
        ether 00:0e:7f:fe:40:c2
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
        inet 127.0.0.1 netmask 0xff000000 

%netstat -rn
Routing tables

Internet:
Destination        Gateway            Flags    Refs      Use
Netif Expire
default            80.242.192.65      UGS         0  6885962
bge0
80.242.192.64/26   link#1             UC          0        0
bge0
80.242.192.65      00:00:0c:07:ac:01  UHLW        1        0
bge0    481
80.242.192.80      00:0e:7f:fe:10:3f  UHLW        0      229
lo0
80.242.192.81      00:19:bb:25:7b:63  UHLW        0   179281
bge0   1027
127.0.0.1          127.0.0.1          UH          0   277552
lo0
192.168.2          192.168.3.254      UGS         0     8209
bge1
192.168.3          link#2             UC          0        0
bge1
192.168.3.222      00:0e:7f:fe:40:c2  UHLW        0     7283
lo0
192.168.3.254      00:a0:8e:77:9a:b9  UHLW        1        0
bge1    521
%

Has anybody an idea why i get these messages? Or how i can find
out where they come from?

Philippe



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