Chapter 23: IPv6
STANDARD Revision 1.0 C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved. 732
Prefix Delegation
Prefix Delegation consists of an exchange of messages between the DHCPv6 server and the CPE router as shown in the
figure below. The DHCPv6 server delegates or assigns prefixes to the CPE routers. The CPE routers then assign IPv6
addresses to the CPEs (clients) behind them using the routers’ delegated prefixes.
Figure 91: Block Diagram of PDRI Feature
CPE routers use the link-local IP address in DHCPv6 messages in accordance with RFC 3315, Section 16, Client Source
Address and Interface Specification. The DHCPv6 relay agent within the C4/c CMTS relays the DHCPv6 messages between
the DHCPv6 server(s) and all directly connected CPEs and CPE routers on the cable side of the C4/c CMTS. The relay agent
processes the PD options within the DHCPv6 messages, extracts the prefixes (routes), and adds them to the route table.
To Next Page
Loading...
