Date: Thu, 20 Nov 2008 14:52:49 +0300 From: Eygene Ryabinkin <rea-fbsd@codelabs.ru> To: Cole <cole@opteqint.net> Cc: freebsd-net@freebsd.org Subject: Re: FreeBSD Bridge and ARP question/strangeness Message-ID: <P2x/4pnCDlbVwbADUOSkDRmGbl4@o1luUL%2BLRVPdz%2BdKjxjg6ihEflI> In-Reply-To: <002f01c94af4$ecbced90$c636c8b0$@net> References: <002f01c94af4$ecbced90$c636c8b0$@net>
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Cole, good day.
Thu, Nov 20, 2008 at 11:46:42AM +0200, Cole wrote:
> I have a box with a few interfaces, and i had setup rl0 with an ip address
> and it could communicate/ping everything on the network fine, all the rest
> of the other interfaces are unplugged and have no ip's assigned. Now if i go
> ahead and create a bridge interface and then just add that single interface
> with the ip assigned to it to the bridge, without assigning a new ip to the
> bridge, i get some strange things happening. Every box on the network not
> running FreeBSD is still able to ping and receive a reply from the box on
> the ip it was using on the interface. However, no FreeBSD box is now able to
> ping the box at all. In the arp listing, it shows any of the FreeBSD boxes
> that are trying to ping it as "(incomplete)". But for every other box that
> isn't FreeBSD it gets a full arp listing and all those boxes are still able
> to communicate with the box fine.
I think that the first thing to look at will be the tcpdump of the ARP
traffic -- if your peers are seeing '(incomplete)' as the bridging host
MAC, then it is good to check if ARP requests are received and are they
replied to.
'tcpdump -lvvnetti rl0 arp' should produce the fine listing. And the
output of 'ifconfig' and 'sysctl net.link.bridge' will be helpful too.
--
Eygene
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