[ECOS] Re: How to add multicast route?

[Grant Edwards]

On 2011-04-01, Andrew Lunn <andrew@lunn.ch> wrote:
> Hi Grant
>
>> Adding the 224.0.0.0/24 route seems to work if I first add a default
>> route. 
>
> I've not looked at the code, i'm just speculating here....
>
> I've seen cases where a unicast subnet route is rejected if there is
> no route which leads to the gateway. It could be your multicast route
> is being rejected for the same reason.

Since the route specifies a device to use and doesn't have the gateway
flag set, it would seem to me that the gateway address should be
ignored.  But, it could be another bug in the stack.

> An idea.... 
>
> Grab a live CD of FreeBSD. http://livecd.sourceforge.net/ Run strace,
> or what ever the BSD equivalent is, on adding the route. You can then
> see what parameters it passes.

I thought about that.  I'd have to modify strace to print out the
contents of rtenty -- all it prints by default is the address of the
structure.

I did do something similar on Linux, and it passes 0.0.0.0 as the
gateway address when doing the "route -net" command that everybody
says is what you should do.

I think next I'll try passing either my own address (10.0.0.102, or
the local network 10.0.0.0 and see what happens).

-- 
Grant Edwards               grant.b.edwards        Yow! A can of ASPARAGUS,
                                  at               73 pigeons, some LIVE ammo,
                              gmail.com            and a FROZEN DAQUIRI!!


-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss