Brad Fitzpatrick (bradfitz) wrote in lj_dev,
Brad Fitzpatrick
bradfitz
lj_dev

ARP & Linux Weirdness

One of our Linux boxes is sending ARPs for an IP address for both its NICs, which is pissing off other machines.

Whose fault is it? My misconfiguration or Linux being dumb?

Aug 17 13:24:48 bigip kernel: arp info overwritten for 66.150.15.140 by 00:e0:81:01:e9:33
Aug 17 13:32:51 bigip kernel: arp info overwritten for 66.150.15.140 by 00:d0:b7:c5:90:2d
Aug 17 13:32:51 bigip kernel: arp info overwritten for 66.150.15.140 by 00:e0:81:01:e9:33
Aug 17 13:38:26 bigip kernel: arp info overwritten for 66.150.15.140 by 00:d0:b7:c5:90:2d
Aug 17 13:38:26 bigip kernel: arp info overwritten for 66.150.15.140 by 00:e0:81:01:e9:33
Aug 17 13:43:50 bigip kernel: arp info overwritten for 66.150.15.140 by 00:d0:b7:c5:90:2d

Kernel is 2.2.18.

$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:D0:B7:C5:90:2D
inet addr:10.0.0.15 Bcast:10.255.255.255 Mask:255.0.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:72235483 errors:0 dropped:0 overruns:0 frame:0
TX packets:89740496 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
Interrupt:18 Base address:0xfc40 Memory:c0862000-c0862c40

eth1 Link encap:Ethernet HWaddr 00:E0:81:01:E9:33
inet addr:66.150.15.140 Bcast:66.150.15.159 Mask:255.255.255.224
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:17990789 errors:0 dropped:0 overruns:0 frame:0
TX packets:3437714 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
Interrupt:23 Base address:0xf0c0 Memory:c0864000-c0864c40
Subscribe
  • Post a new comment

    Error

    Anonymous comments are disabled in this journal

    default userpic

    Your reply will be screened

    Your IP address will be recorded 

  • 15 comments