[c-nsp] multipath BGP not balancing equally.

[Rodney Dunn]

For small flow combinations you are right. btw, it would be just L3 
src/dst flows by default unless the L4 port option is enabled.

I thought about there being a single flow causing the difference that 
would be hashing down one of the paths. But 2G, while not impossible, 
typically isn't used between two ip addresses. It's something to check 
though for sure.

Rodney



Mikael Abrahamsson wrote:
> On Tue, 4 Aug 2009, Rodney Dunn wrote:
> 
>> That's usually caused by routes not being the same on the paths.
> 
> It was my understanding that this usually was caused by not having 
> enough L4 flows to loadshare on...? Ie if you have 100 TCP flows and 4 
> paths, then it's not enough flows to get good load share on, but if you 
> instead have 10k flows and all of them are low-speed, then the odds of 
> them being equally load shared is much better?
>