Eduardo Meyer [EMAIL PROTECTED] wrote:
> 
> For example, I have a certain traffic outgoing to AS 4230, it was
> going via AS17379, and with localpref I could make it go via 18881.
> 
> However, I need to balance it in the adequated ratio, say, make 40% of
> outgoing traffic to 4230 go via 1881 while 60% goes out via 17379.
> 
> If you could point me to what to read, or suggest anything, thats what
> I need, some words from the experienced ones.
> 

That's very hard to do without selectively routing certain netblocks
through one provider and certain ones through another. 

The easiest thing you could do would be to use some PF rdr rules to
send traffic _from_ certain known senders on your side to go through one
provider and some to another.  

This isn't an easy requirement to fill with BGP manipulation.  If you heard
of some netblocks in 4230 from 1881 and some from 17379, then it would take
care of itself.  So you could filter certain incoming blocks out of your feed
from one provider, so that you only send traffic to those blocks from the
other provider.

Either of these heavy handed techniques would result in some downtime if
one of your providers fails, unless you have some other technique to 
change your filters when the provider fails.  It's pretty sketchy no matter
how you do it.

Chris

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