On 10/14/20 10:18 AM, Stuart Henderson wrote:
On 2020-10-11, Henrik Friedrichsen <hen...@diff.cc> wrote:
Hey,
my ISP provides connectivity via PPPoE. An IPv6 prefix is handed out via
DHCPv6 PD, which my OpenBSD gateway passes on to clients with the help
of router advertisements using rad.
This works fine until the ISP disconnects me after 24h (force disconnect
on ISP side). The gateway receives a new prefix via prefix delegation
and rad advertises it in the local network. So far so good. However, as
The IPv6 protocol does not have the necessary features to reliably cope
with this setup. (Neither does IPv4 for that matter).
I am affected by the same problem, even though my provider (Deutsche Telekom)
resets the IPv6 prefix only once in a while.
Wasn't there some RFC saying that the ISP has to (or should?) route both
prefixes til the old prefix expires and that the forcible disconnect is
allowed only for hardware failures or something similar? Resetting the
prefix every 24h doesn't sound like that.
Maybe there are better ISPs available at your site?
Another option might be to NAT your internal net. Unlike NAT for IPv4 you
could introduce a one-to-one mapping between internal and external IPv6
addresses and port numbers.
Regards
Harri
