nanog mailing list archives
Re: Dynamic (changing) IPv6 prefix delegation
From: Bjørn Mork <bjorn () mork no>
Date: Mon, 21 Nov 2011 17:33:59 +0100
Seth Mos <seth.mos () dds nl> writes:
Hello List, As a pfSense developer I recently ran into a test system that (actually) gets a IPv6 prefix from it's ISP. (Hurrah). What is bewildering to me is that each time the system establishes a new PPPoE session to the ISP they assign a different IPv6 prefix via delegation together with a differing IPv4 address for the WAN. Is this going to be forward for other consumer ISPs in the world?
I certainly hope not. But you should be prepared to handle the situation anyway. Even those ISPs providing a stable prefix may have to change it from time to time. Which means that there is always a risk that the prefix changes with a new PPPoE session, even if that doesn't happen every time. And if the prefix does change, then the old prefix will most likely not be routed out the new PPP interface even if the lease hasn't expired yet. You'll probably want to deprecate the old prefix when this happens, signalling to the hosts that they should prefer the new prefix for new sessions. Bjørn
Current thread:
- Dynamic (changing) IPv6 prefix delegation Seth Mos (Nov 21)
- Re: Dynamic (changing) IPv6 prefix delegation Bjørn Mork (Nov 21)
- Re: Dynamic (changing) IPv6 prefix delegation Nick Hilliard (Nov 21)
- Re: Dynamic (changing) IPv6 prefix delegation Owen DeLong (Nov 21)
- Re: Dynamic (changing) IPv6 prefix delegation Daniel Roesen (Nov 21)
- Re: Dynamic (changing) IPv6 prefix delegation Owen DeLong (Nov 21)
- RE: Dynamic (changing) IPv6 prefix delegation Nathan Eisenberg (Nov 21)
- Re: Dynamic (changing) IPv6 prefix delegation Gary Buhrmaster (Nov 21)
- RE: Dynamic (changing) IPv6 prefix delegation Nathan Eisenberg (Nov 21)
- Re: Dynamic (changing) IPv6 prefix delegation Owen DeLong (Nov 21)
- Re: Dynamic (changing) IPv6 prefix delegation Bjørn Mork (Nov 22)
- Re: Dynamic (changing) IPv6 prefix delegation Joel jaeggli (Nov 24)
- Re: Dynamic (changing) IPv6 prefix delegation Daniel Roesen (Nov 21)
- Re: Dynamic (changing) IPv6 prefix delegation Bjørn Mork (Nov 21)