Re: Newbie Question about addressing impacts

[Iljitsch van Beijnum <iljitsch@muada.com>]

Hi Eric,

On 11-aug-04, at 18:13, Fleischman, Eric wrote:

> Newbie question: Assuming a multihomed environment with N ISPs 
> supporting a corporate network of 2K+ routers and 200K+ computers. Is 
> multi6 proposing that the interfaces of the routers and computers each 
> have N different global addresses, one set for each of the N ISPs?

At this time, multi6 isn't exactly proposing anything. But yes, pretty 
much everything that's under discussion right now assumes this.

> If so, has multi6 considered the impact of this approach to IGP and 
> EGP performance? If so, what was the consensus conclusion to that 
> evaluation?

There hasn't been an evaluation.

There is a feature that I'm very much in favor of that could help here: 
the ability to implement a multihoming solution in middleboxes or 
border routers. In such a scenario, there would be a set of addresses 
for internal use in the site, and the proxy multihoming devices add the 
multihoming capability somewhere close to the border of the network. 
The good thing here is that there is no need to modify each individual 
host to obtain multihoming benefits, and it's easier to implement 
policy in a few central places rather than distributed over all the 
hosts in the network.