[j-nsp] BGP Multipath

[Pavel Lunin]

23.07.2013 16:16, Mark Tinka wrote:
>> I'm afraid this explanation needs to be expanded a bit.
>> High LP on the ISP side for customers' routes is a
>> common practice, but this makes the perpended AS-PATH
>> (and other BGP attributes) ignored only within the ISP
>> AS.
> Yes, this is true.
>
> However, if your upstream handles a large portion of the
> Internet, that's is a reasonable amount of traffic,
> particularly if your secondary ISP is not as well-connected
> as the other ISP.
>

Yep. This consideration implicitly means that an obvious (at the first 
glance) idea to buy a broader link from a cheaper and smaller ISP and a 
narrower one from a larger and usually more expensive ISP is apparently 
wrong. Very frequent mistake enterprise network guys tend to make.