interface ip arp

Arnaud Lacombe lacombar at gmail.com
Mon May 2 03:32:58 UTC 2011


Hi,

On Sun, May 1, 2011 at 10:50 PM, Li, Qing <qing.li at bluecoat.com> wrote:
> jeez, this bug has been around for quite a while ...
>
> Please try patch at  http://people.freebsd.org/~qingli/arp.patch
>
Do not help:

# sh -x test.sh
+ ifconfig vr2 up 192.168.24.1
+ arp -s 192.168.24.2 0:0:0:0:0:1
+ arp -a
? (192.168.24.1) at 00:00:24:cb:f4:92 on vr2 permanent [ethernet]
? (192.168.24.2) at 00:00:00:00:00:01 on vr2 permanent [ethernet]
+ ifconfig vr2 down
+ arp -a
+ ifconfig vr2 up
+ arp -a
? (192.168.24.1) at 00:00:24:cb:f4:92 on vr2 permanent [ethernet]

As you can see, the address is lost when the interface is brought down.

 - Arnaud

> -- Qing
>
> ________________________________________
> From: owner-freebsd-net at freebsd.org [owner-freebsd-net at freebsd.org] on behalf of Li, Qing
> Sent: Sunday, May 01, 2011 4:54 PM
> To: Ingo Flaschberger
> Cc: freebsd-net at freebsd.org
> Subject: Re: interface ip arp
>
> That's not the expected behavior, probably a bug, I will take a look ...
>
> -- Qing
>
>
>
>
> On May 1, 2011, at 4:51 PM, "Ingo Flaschberger" <if at xip.at> wrote:
>
>>> is it expected behaviour that the static, permanent arp entry of the interface ip disappear after ifdown/ifup at 8.x release?
>>>
>>> ifconfig em0 10.20.20.1/24
>>> arp -an | grep 10.20.20.1
>>> ? (10.20.20.1) at xx:xx:xx:xx:xx:xx on em0 permanent [ethernet]
>>> ifconfig em0 down
>>> ifconfig em0 up
>>> arp -an | grep 10.20.20.1
>>> nothing
>>
>> resend this "question" - as there was no respone.
>>
>> Kind regards,
>>    Ingo Flaschberger
>>
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