Bug 457090

I am unable to recreate this locally.  Can you give me details on what your setup looks like so I can try to reproduce it locally and work on a fix?

Created attachment 317988 [details]
Network config files

Please find attached my network config files.

The problem is that when bond0.5 is started (currently started manually due to this problem!), dhcp rewrites the default route despite the fact that (see route-bond0.6) it is marked static.

dhcp should not be removing routes unless (a) they are kernel routes, or (b) they were added by dhcp itself.

Sorry for the late reply.  It's been quite busy with the end of F-10 and RHEL 5.3 in the works.

Let me make sure I understand your configuration correctly...
You've only got one bond interface that is configured via DHCP.  The others are static.  The DHCP controlled interface should not be driving over your default route, which is already set by one of the other interfaces.  Is this correct?

If that's the case, what happens when you add

    GATEWAYDEV=bond0.6

to the ifcfg-bond0.5 file?

Yes, my configuration is as you suggest. The only reason I'm using dhcp is because I have a Cisco PIX which I use for access to the Red Hat VPN and dhcp is the only option which works in that case.

Now adding GATEWAYDEV would not solve the problem, and in fact it creates a new one. The problem is that dhcp should not be removing static routes since it is basically a dynamic routing system, like any other. Also GATEWAYDEV would add kernel routes, not static routes which is why I never use that feature in the first place. Its much easier just to set the routes using the route-* files where required and then you get full control over what is going on.

Either way though, dhcp should not be changing routes which are marked static, it should only be touching those it added itself, or those which are marked kernel. That should apply to any route, not just the default route which happens to be the problem here.

All of the routing setup for dhclient is handled by /sbin/dhclient-script.  And here are all of the lines in F-9 that add/change routing table entries:

198:             /sbin/ip route add ${router}/32 dev $interface
221:        /sbin/ip route replace default via $router dev $interface $metric
265:            /sbin/ip route replace ${new_network_number}/${prefix_bits} dev $interface
267:                /sbin/ip route del default
299:                /sbin/ip route replace default via $GATEWAY dev $interface
328:                    /sbin/ip route replace ${target}/$(class_bits $target) via ${gateway} dev $interface ${metric}
343:        /sbin/ip route replace ${alias_ip_address}/32 dev $interface:0
473:        /sbin/ip route replace default dev $interface && added_old_broadcast_route=1
557:        /sbin/ip route replace ${alias_ip_address}/32 $interface:0

Have you tried DHCLIENT_IGNORE_GATEWAY=yes in ifcfg-bond0.5?

Have not heard anything back since comment #5.

Please do not close this. The machine in question is being used as my main email/dns/everything box atm, so I'm trying to find a moment to do the test on another machine.

For my own status tracking purposes, I'm going to flag this as needinfo since I'm waiting on additional information.

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Clearing needinfo, since someone is now running a script that generates email from needinfo flags :(