nanog mailing list archives
Re: Internet Edge Router replacement - IPv6 route tablesizeconsiderations
From: Owen DeLong <owen () delong com>
Date: Thu, 10 Mar 2011 23:33:51 -0800
On Mar 10, 2011, at 11:22 PM, Dobbins, Roland wrote:
On Mar 11, 2011, at 2:02 PM, Owen DeLong wrote:If you want to be truly anal about it, you can also block packets to non-existent addresses on the PtoP links.Sure, I advocate iACLs to block traffic to p2p links and loopbacks. Still, it's best not to turn routers into sinkholes in the first place.This isn't a one-time-use of IPv6 addresses and the one-time-uses of IPv6 addresses are what should be considered unscalable and absurdly wasteful.I don't know that I agree with this - I can see lots of value in one-time-use addresses/blocks, and have a metaphysical degree of certitude that they'll be used that way in some cases, irrespective of what I think.
If so, opefully from a tiny and limited range. fc::/7 sounds good to me. It has few other useful purposes in life.
There's a lot to be said for the principle of least surprise and uniform /64s actually help with that quite a bit.Enforcing uniformity of wasteful and potentially harmful addressing practices in the name of consistency isn't necessarily a win, IMHO.
We can agree to disagree. I don't think it's so wasteful and it's what the bits were put there to do. Perverting them to other uses and then complaining that the legitimate uses are getting in the way, OTOH, well...
;>Frankly, unless you have parallel links, there isn't a definite need to even number PtoP links for IPv6. Every thing you need to do with an interface specific address on a PtoP link can be done with link local.Which is why IP unnumbered caught on so well in IPv4-land, heh?
There's a HUGE difference between IP unnumbered and link-local. Frankly, absent parallel links, there was a lot to be said for IP unnumbered and I think that if people had better understood the implications of where and when it was a good vs. bad idea and tied it properly to loopbacks instead of $RANDOM_INTERFACE, it might have caught on better. Owen
Current thread:
- RE: Internet Edge Router replacement - IPv6 route table sizeconsiderations, (continued)
- RE: Internet Edge Router replacement - IPv6 route table sizeconsiderations George Bonser (Mar 10)
- RE: Internet Edge Router replacement - IPv6 route table sizeconsiderations Pekka Savola (Mar 10)
- RE: Internet Edge Router replacement - IPv6 route table sizeconsiderations George Bonser (Mar 10)
- Re: Internet Edge Router replacement - IPv6 route table sizeconsiderations Jeff Wheeler (Mar 10)
- RE: Internet Edge Router replacement - IPv6 route tablesizeconsiderations George Bonser (Mar 10)
- Re: Internet Edge Router replacement - IPv6 route tablesizeconsiderations Dobbins, Roland (Mar 10)
- RE: Internet Edge Router replacement - IPv6 routetablesizeconsiderations George Bonser (Mar 10)
- Re: Internet Edge Router replacement - IPv6 routetablesizeconsiderations Dobbins, Roland (Mar 10)
- Re: Internet Edge Router replacement - IPv6 route tablesizeconsiderations Owen DeLong (Mar 10)
- Re: Internet Edge Router replacement - IPv6 route tablesizeconsiderations Dobbins, Roland (Mar 10)
- Re: Internet Edge Router replacement - IPv6 route tablesizeconsiderations Owen DeLong (Mar 10)
- Re: Internet Edge Router replacement - IPv6 route tablesizeconsiderations Dobbins, Roland (Mar 11)
- Re: Internet Edge Router replacement - IPv6 route tablesizeconsiderations James Stahr (Mar 11)
- Re: Internet Edge Router replacement - IPv6 route tablesizeconsiderations Tim Durack (Mar 11)
- Re: Internet Edge Router replacement - IPv6 route tablesizeconsiderations Richard A Steenbergen (Mar 11)
- Re: Internet Edge Router replacement - IPv6 route tablesizeconsiderations Jeff Wheeler (Mar 11)
- Re: Internet Edge Router replacement - IPv6 route tablesizeconsiderations Joe Maimon (Mar 11)
- Re: Internet Edge Router replacement - IPv6 route tablesizeconsiderations Valdis . Kletnieks (Mar 11)
- Re: Internet Edge Router replacement - IPv6 route tablesizeconsiderations Joe Maimon (Mar 11)
- Re: Internet Edge Router replacement - IPv6 route tablesizeconsiderations Leo Bicknell (Mar 11)
- Re: Internet Edge Router replacement - IPv6 route tablesizeconsiderations Leo Bicknell (Mar 11)