Re: IP TOS based routing

[Kim Jensen <kimj@dawn.dk>]

On Tuesday 25 March 2003 09:51, Simone Leggio wrote:
> Hi all,
>
> I have to send prioritised traffic from host A to host B.
>
> The priority 1 is identified by an IP TOS value of, say 46.
> The priority 2 is identified by an IP TOS value of, say 26.
>
> In my network topology, there are two possible routes from host A to
> host B, one through host A's network interface eth0 and the other one
> through eth1.
>
> I'd like to know whether it is possible, and if so how, with traffic
> control to set filters so that packets with TOS 46 are sent to host B
> via eth0 and packets with TOS 26 via eth1.
>
> Note that the destination address for all the packets is the same, what
> I need is just to route through different interfaces to the same
> destination.
>
Hi Simone,

Try to use the mangle table to mark your packets which match a specific TOS, 
and then add a second routing table with the alternative default connection. 
That should work. You can find more info on:

http://linux-ip.net/html/adv-multi-internet.html
http://www.ssi.bg/~ja/nano.txt

/Kim