From mboxrd@z Thu Jan 1 00:00:00 1970 From: N N Ashok Date: Fri, 31 Oct 2003 00:43:25 +0000 Subject: Re: [LARTC] default route Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org 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 > _______________________________________________ > LARTC mailing list / LARTC@mailman.ds9a.nl > http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/ -- ----------------------------------------------------------------------------- N N Ashok Ph: 408-644-3646 (c) 517-353-4633 (ELANS Lab) 517-355-1789 (ERL Lab) ----------------------------------------------------------------------------- _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/