Ralph Droms wrote:
Cisco's CNR and IOS DHCPv6 servers both implement PD. The IOS DHCPv6
client implements PD, and can automatically assign /64s from a
delegated prefix to downstream interfaces.
I'm a bit confused by the above. It might be terminology, or your use of
it, but either way, it would be helpful to give some examples of IOS
server(s) and IOS client(s), doing DHCPv6 vanilla, and DHCPv6 with PD.
E.g.
r1 (IOS box, acting as DHCPv6 server)
r2 (IOS box, acting both as DHCPv6 client to r1, and DHCPv6 server to h1)
h1 (DHCPv6 client)
r2 requests address from r1, gets A1-1 (address 1 from address block A1).
r2 assigns A1-1 to its interface on-link with r1. r2 sets its default to
whatever address was given to it by r1.
r1 delegates prefix A2 to r2.
r2 assigns A2-1 to itself, and applies A2-1 its downstream interface,
which is also serving DHCPv6.
h1 request an address from r2.
r2 assigns A2-2 to h1. r2 also sets the default gateway to A2-1 so h1
uses r2 (specifically A2-1) as its default route.
Is this what you're talking about?
If so, what additional assumptions are built in, about the interface
addresses and block sizes?
Will assignments only occur if the prefix is /64?
What happens if the PD is something other than /64? E.g. a /80, or a
/120, for examples.
Thanks,
Brian
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