Date: Thu, 18 Oct 2001 17:39:35 +0300 From: Ruslan Ermilov <ru@FreeBSD.ORG> To: Darren Henderson <darren@bmv.state.me.us> Cc: stable@FreeBSD.ORG, net@FreeBSD.ORG Subject: Re: /kernel: arp_rtrequest: bad gateway value Message-ID: <20011018173935.A43019@sunbay.com> In-Reply-To: <Pine.A41.4.21.0109261254580.32808-100000@katahdin.bmv.state.me.us>; from darren@bmv.state.me.us on Wed, Sep 26, 2001 at 01:08:40PM -0400 References: <Pine.A41.4.21.0109251620020.25940-100000@katahdin.bmv.state.me.us> <Pine.A41.4.21.0109261254580.32808-100000@katahdin.bmv.state.me.us>
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On Wed, Sep 26, 2001 at 01:08:40PM -0400, Darren Henderson wrote:
>
> Posted something similar the other day, but thought I would ask in a more
> general way....
>
> What causes this error? Looking at the archives and source it appears to be
> related to aliases and if_inet.c
>
> What has changed between 4.3 and 4.4 that would account for this error
> appearing under 4.4 but not appear under 4.3 on a system where the network
> configuration has not changed?
>
> Everything appears to be working fine after the upgrade other then the
> appearance of this message numerous times during the day with no apparent
> pattern.
>
> Any thoughts appreciated.
>
There's the problem with routed(8). It issues a command similar to
"route change ip ip" for each (but last) IP address of an interface
if the route already exists and is different. This results in a
changed route with AF_INET gateway, but route's IFA still points to
Ethernet device and rt_ifa->ifa_rtrequest == arp_rtrequest. This
results in this message as AF_INET != AF_LINK. The message is
harmless. This is also reproduceable on a 4.1-RELEASE machine.
How to repeat without routed(8):
1. Add IP address to your Ethernet interface:
ifconfig rl0 192.168.1.1 alias
2. Create route for this address:
ping -c1 192.168.1.1
3. Verify that the route was created with gateway of type AF_LINK:
route -vn get 192.168.1.1
4. Change the route like routed(8) does:
route change 192.168.1.1 192.168.1.1
5. Watch the dmesg(8) output then repeat "route get" command to
see route's gateway changed to AF_INET:
route -vn get 192.168.1.1
Cheers,
--
Ruslan Ermilov Oracle Developer/DBA,
ru@sunbay.com Sunbay Software AG,
ru@FreeBSD.org FreeBSD committer,
+380.652.512.251 Simferopol, Ukraine
http://www.FreeBSD.org The Power To Serve
http://www.oracle.com Enabling The Information Age
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