IPv6 Prefix Delegation to customers.

Thu Jan 16 16:50:32 UTC 2020

Brandon, I vaguely recall that the dhcp relay snooping function is able to
add those routes to the local route table. and then redistribution into the
routing process occurs

Question similar to yours was asked here in 2017 - September.

https://mailman.nanog.org/pipermail/nanog/2017-September/092416.html

I responded with some IOS and Junos output from some of my lab gear.

https://mailman.nanog.org/pipermail/nanog/2017-September/092451.html

I may have to dig to find and confirm these things, or perhaps lab it up
again.  I need to anyway as I may need to get more serious about deploying
v6 too.

-Aaron

From: NANOG [mailto:nanog-bounces at nanog.org] On Behalf Of Brandon Price
Sent: Wednesday, January 15, 2020 8:01 PM
To: nanog list
Subject: IPv6 Prefix Delegation to customers.

Hey Nanog,

I am in the process of building out a FTTH proof of concept, and I would
really like to offer each of my customers a /48 of IPv6. 

I've been able to announce my /32 to my upstreams, dual-stack all of my
internal infrastructure no-problem, build v6 recursive name servers, etc.

This was fairly straight-forward.

Where I am struggling is the Prefix Delegation part. How are most folks
getting the PD subnets into their IGPs? In my environment I don't run the
DHCP server process on the router that is directly connected to the clients.
I have seen documentation that cisco and juniper DHCPv6 processes are smart
enough to insert that prefix into the routing table when they hand it out,
but how is this handled in an environment with a central DHCP server? I do
not currently run any PPPOE in my environment and I don't use RADIUS for the
subscriber management. I would really just like to stick to DHCP ideally.

If anyone has any pointers, I would appreciate it.

Brandon Price

Senior Network Engineer

City of Sherwood, Sherwood Broadband

Desk: 503.625.4258

Cell: 971.979.2182

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