Hey Guys,
Currently studying for the JNCIS-ENT and trying to understand loadbalancing.
Just one aspect. The book says that the default IGP loadbalancing behaviour, is to only use one of the available paths for destinations. I keep re-reading this, but if I'm understanding correctly, it's saying that when two (or more) equal cost paths exist to the same destination, all traffic going to that destination will only flow down one of the available paths. If that's the case, how is this loadbalancing? Or have I misunderstood?
Unless it's saying that, traffic destined to one destination will go down one path, traffic destined to another destination the next will go down the other and so on - in which case, how is that different to BGP's loadbalancing behaviour, assuming that "destination" is synonymous with "prefix"?
The page that describes this has been attached.
Thanks in advance,
Kindest Regards,
Andrey