[LARTC] default route

[N N Ashok]

On Thursday 30 October 2003 02:52 am, Vadiraj C S scrawled:
> On Thu, 30 Oct 2003, Damion de Soto wrote:
> > getting lost. anyone comment on this ?
> >
> > If you use the ip route tool to created multiple weighted or equalized
> > default routes, you then use source-based routing to make sure that the
> > traffic goes back out the same route it came in on.
> > (unless you're trying to be tricky with asymetrical routing)
>
>   I tried this, the routes get cached so most of the time the packets
>   leave from the route they came in, but you can have two routes and
>   there is no packet loss.
>
> Vadiraj C S
>

hi,
Having multiple equal cost routes just ensures that the traffic is balanced 
per-route, i.e.  every time a route is looked up in the FIB table, the 
load-balancing comes into picture. but once a route has been established for 
a destination, it is cached and all packets to that destination go via that 
route. However, if you install the nano patch 
(http://www.ssi.bg/~ja/nano.txt), the the load-balancing is done on a 
per-packet basis. so for every packet, leaving the system (either forwarded 
or output), the FIB table is consulted and the packets are balanced on the 
multiple equal-cost paths provided you have 'equalize' keyword for that 
multiple equal-cost route.

current i am actually implementing load-balancing (outgoing) on a per-session 
and current-bandwidth-usage basis.

hope that helps.
ashok

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