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Arps when bridged.

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Rickard Dahlstrand

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Jan 16, 2004, 5:13:46 AM1/16/04
to
Hi,

I'm getting these messages. I have three interfaces, one uses DHCP and the =
other two are bridged.

Here is the log I get:

Jan 16 10:13:57 testburk /kernel: arp: 00:10:f3:03:44:69 is using my IP add=
ress 10.1.1.69!
Jan 16 10:13:57 testburk /kernel: arp: 00:10:f3:03:44:6a is using my IP add=
ress 10.1.1.69!
Jan 16 10:14:47 testburk /kernel: arp: 00:10:f3:03:44:69 is using my IP add=
ress 10.1.1.69!
Jan 16 10:14:47 testburk /kernel: arp: 00:10:f3:03:44:6a is using my IP add=
ress 10.1.1.69!
Jan 16 10:57:31 testburk /kernel: arp: 00:10:f3:03:44:69 is using my IP add=
ress 10.1.1.69!
Jan 16 10:57:31 testburk /kernel: arp: 00:10:f3:03:44:6a is using my IP add=
ress 10.1.1.69!
Jan 16 11:03:06 testburk /kernel: arp: 00:10:f3:03:44:69 is using my IP add=
ress 10.1.1.69!
Jan 16 11:03:06 testburk /kernel: arp: 00:10:f3:03:44:6a is using my IP add=
ress 10.1.1.69!
Jan 16 11:06:40 testburk /kernel: arp: 00:10:f3:03:44:69 is using my IP add=
ress 10.1.1.69!
Jan 16 11:06:40 testburk /kernel: arp: 00:10:f3:03:44:6a is using my IP add=
ress 10.1.1.69!

What is the problem and does anyone know if ifconfig fxp1 -arp should stop =
this?

Thanks, Rickard.
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Per Engelbrecht

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Jan 16, 2004, 10:18:28 AM1/16/04
to
Hi Rickard
This is more of 'net' problem than 'ipfw' but anyway, don't disable
'arp'.When sending a piece of your log, please also include the (in this case)
'ifconfig' and 'sysctl.conf' !
I could be wrong, but it seems more likely that you're having a loop.
Read 'man bridge(4)' the last paragraph above the 'examples' section.

If your bridging from a performance point of view, then have a look at
'ngctl' aswell http://bsdvault.net/sections.php?op=viewarticle&artid=98
Only downfall is when it's used in conjunktion with HP Procurve
switches -they don't like the idea "two identical" mac-addresses!

Regards
/per
p...@xterm.dk

> Hi,
>
> I'm getting these messages. I have three interfaces, one uses DHCP

> and the other two are bridged.


>
> Here is the log I get:
>
> Jan 16 10:13:57 testburk /kernel: arp: 00:10:f3:03:44:69 is using

> my IP address 10.1.1.69! Jan 16 10:13:57 testburk /kernel: arp:
> 00:10:f3:03:44:6a is using my IP address 10.1.1.69! Jan 16 10:14:47
> testburk /kernel: arp: 00:10:f3:03:44:69 is using my IP address


> 10.1.1.69! Jan 16 10:14:47 testburk /kernel: arp: 00:10:f3:03:44:6a

> is using my IP address 10.1.1.69! Jan 16 10:57:31 testburk /kernel:
> arp: 00:10:f3:03:44:69 is using my IP address 10.1.1.69! Jan 16


> 10:57:31 testburk /kernel: arp: 00:10:f3:03:44:6a is using my IP

> address 10.1.1.69! Jan 16 11:03:06 testburk /kernel: arp:
> 00:10:f3:03:44:69 is using my IP address 10.1.1.69! Jan 16 11:03:06
> testburk /kernel: arp: 00:10:f3:03:44:6a is using my IP address


> 10.1.1.69! Jan 16 11:06:40 testburk /kernel: arp: 00:10:f3:03:44:69

> is using my IP address 10.1.1.69! Jan 16 11:06:40 testburk /kernel:
> arp: 00:10:f3:03:44:6a is using my IP address 10.1.1.69!


>
> What is the problem and does anyone know if ifconfig fxp1 -arp

> should stop this?

Rickard Dahlstrand

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Jan 18, 2004, 5:42:52 AM1/18/04
to
Thanks,

Sorry about the lack of information. But after trying the -arp in the
bridged interfaces it actually stopped complaining about this. I will dig
down into the bridging issue, but right now it's doing what I want.

Thanks, Rickard.

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