Re: [narten@us.ibm.com: PI addressing in IPv6 advances in ARIN]

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

On 14-apr-2006, at 2:05, Jason Schiller (schiller@uu.net) wrote:

> I'd like to point out that if people think that PI (and placing 1 or
> more routes in the global Internet routing table) is an acceptable
> solution to multi-homing, then it is also likely that more  
> specifics of PA
> space to support multi-homing is also acceptable, and likely to  
> happen.

> This removes the fact that few people would be able to multi-home  
> in the
> traditional sense.

Actually it doesn't. It's very hard to qualify for a /22 so  
effectively this only helps Big Content. The issue of smaller ISPs or  
whole sale transit carriers that don't give out address space to  
their customers because those all have PA isn't addressed here.

But it completely changes the game: why spend time on deploying shim6  
if you can round up your IPv4 needs to get to a /22 or lobby for  
reducing the /22 requirement?

> So there are only two questions:

> 1. Is there sufficent need to continue shim6 for a no-frills easy
> multi-homing solution for consumer and small business customers  
> that can't
> or won't support BGP?

> 2. Are people concerned with the long term implacations of de- 
> aggrgegation
> for multi-homing, and if so, then should we pursue a protocol solution
> that has full support for TE in an effort to replace de- 
> aggrgegation as a
> solution and halt (or possibly reverse) the growth of the routing  
> table?

Let me add a third question: will shim6 be deployable when people can  
get PI?

Maybe shim6 can still do some good but we really need to rethink our  
goals here. I was uncomfortable with moving fast and only  
implementing bare bones mechanisms before, and even more so now. We  
should slow down and get it right the first try because if there is a  
place for shim6 in a world with IPv6 PI, that place is for a GOOD  
shim6 solution that solves the problem well, something that kinda  
works just to get something out the door isn't good enough and there  
won't be a second chance to come up with an improved version.

> BTW, I was one of six people who voted against moving forward with PI.

How many people voted in favor?