I'm labbing up a branch SRX as a DHCPv6 PD server as managed CPE for customer sites. A /48 is routed to the SRX, and the SRX in turn would dish that out to a customer device via PD. Our ideal deployment would be to just do PD with link-local only on the touchdown (i.e. no SLAAC, NDRA, or ia-na).
DHCPv6 PD works fine and the customer equipment gets the prefix & can set up a ::/0 route via RAs from the SRX. The problem is that if the SRX's touchdown interface to the customer device has LL only, it doesn't install an Access-Internal route for the delegated prefix, and so the customer's PD prefix is unreachable.
If I add a GUA or ULA on the SRX's touchdown interface to the customer equipment and add that /64 under "interface <touchdown> prefix" stanza under router-advertisement, the access-internal route gets installed properly on the SRX when the customer dhcpv6 client gets its PD lease.
Is this expected behaviour? Is running ia-pd with link-local not an accepted deployment model? I flipped around the roles in the lab with a Cisco 867 acting as the PD server and the SRX100 as a client, and IOS is happy to install a route for the PD prefix with link-local only on the touchdown.
Test gear was an SRX110H2-VA. The behaviour was the same on all of the following:
- 12.1X44-D45.2 - 12.1X46-D35.1 - 12.1X47-D20.7 - 12.3X48-D10.3 -- Hugo [email protected]: email, xmpp/jabber PGP fingerprint (B178313E): CF18 15FA 9FE4 0CD1 2319 1D77 9AB1 0FFD B178 313E (also on textsecure & redphone)
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