nanog mailing list archives
Re: who gets a /32 [Re: IPV6 renumbering painless?]
From: Iljitsch van Beijnum <iljitsch () muada com>
Date: Fri, 19 Nov 2004 12:33:27 +0100
On 19-nov-04, at 5:38, Stephen Sprunk wrote:
According to multi6, you will get PA space from each of your ISPs and overlay a prefix from each on every subnet. I'll save y'all another rant on the workability of that model...
Some fear that you would more likely just generate a ULA, use that internally, and NAT at the borders.
It isn't contrary to multi6 gospel to have the address swapping be done by boxes somewhere in the middle rather than have all hosts do it for themselves.
In other words, you get the advantage of NAT: you only have to implement multiple addresses in a few places, along with the advantages of no NAT: the process is reversed at the other end so protocols that break NAT assumptions keep working.
Note that at this time the main focus of the IETF multi6 working group is taking regular communication (such as a TCP session between PA addresses at both ends) and then repair outages using additional PA addresses.
Another way to do this is to use non-routable addresses (such as unique site locals) as the addresses that transport protocols such as TCP and applications see, and start remapping those to/from PA addresses from the start. However, this isn't backward compatible and it's more complex so we're not focussing on this approach at this time. I'm pretty confident that we can add this as an additional option later, though.
Current thread:
- Re: ULA and RIR cost-recovery, (continued)
- Re: ULA and RIR cost-recovery Stephen Sprunk (Nov 25)
- Re: ULA and RIR cost-recovery Owen DeLong (Nov 26)
- Re: ULA and RIR cost-recovery Valdis . Kletnieks (Nov 24)
- Re: ULA and RIR cost-recovery Daniel Senie (Nov 24)
- Re: ULA and RIR cost-recovery Valdis . Kletnieks (Nov 25)
- Re: ULA and RIR cost-recovery Daniel Senie (Nov 26)
- Re: ULA and RIR cost-recovery Owen DeLong (Nov 26)
- Re: who gets a /32 [Re: IPV6 renumbering painless?] Iljitsch van Beijnum (Nov 20)
- Re: who gets a /32 [Re: IPV6 renumbering painless?] Stephen Sprunk (Nov 20)
- Re: who gets a /32 [Re: IPV6 renumbering painless?] Niels Bakker (Nov 19)
- Re: who gets a /32 [Re: IPV6 renumbering painless?] Iljitsch van Beijnum (Nov 19)
- Re: who gets a /32 [Re: IPV6 renumbering painless?] Christian Kuhtz (Nov 19)
- Re: who gets a /32 [Re: IPV6 renumbering painless?] Iljitsch van Beijnum (Nov 20)
- Re: who gets a /32 [Re: IPV6 renumbering painless?] Stephen Sprunk (Nov 19)
- Re: who gets a /32 [Re: IPV6 renumbering painless?] Christian Kuhtz (Nov 19)
- Re: who gets a /32 [Re: IPV6 renumbering painless?] Kevin Loch (Nov 19)
- Re: who gets a /32 [Re: IPV6 renumbering painless?] Paul Vixie (Nov 19)
- Re: who gets a /32 [Re: IPV6 renumbering painless?] Kevin Loch (Nov 19)
- Re: who gets a /32 [Re: IPV6 renumbering painless?] Paul Vixie (Nov 19)
- Re: who gets a /32 [Re: IPV6 renumbering painless?] Stephen Sprunk (Nov 20)
- Re: who gets a /32 [Re: IPV6 renumbering painless?] Paul Vixie (Nov 20)