On 2016-05-26 15:22, Brian Candler wrote:
I have now dealt with two UK providers who, when asked to add IPv6 to
a business connection, have insisted on configuring a flat /48 on the
CPE LAN port.
I was expecting them to configure a /64 interconnect on the LAN port,
plus a /48 static route pointing to the customer's own router or
firewall - or possibly DHCP prefix delegation.
As far as I can see, a flat /48 is going to require the customer to
run NDP proxying for every block of /64 they use internally; and the
CPE will end up maintaining separate NDP entries for every device
inside the customer's network.
It seems broken by design to me. Am I right, or is this considered a
reasonable way to interconnect these days?
Is it just because these ISPs don't understand IPv6, or they don't
want to deal with managing static routes on the CPE?
Using NDP proxying is nonsense.. their configuration is probably fine
for a small office with a single network.. for more complex setups get
them to put the CPE in PPPoE mode and terminate the connection on a
router you control - then you can route /64s to wherever you need.
Rob
