Chapter 23: IPv6
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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IPv6 Prefix Stability
Using Prefix-Stability
IPv6 Prefix Stability feature is an enhancement to the existing Prefix Delegation and Route Injection (PDRI) feature. The
PDRI feature allows the C4/c CMTS to learn IPv6 PD type routes as they are given via DHCPv6 to requesting IPv6 gateways.
The C4/c CMTS keeps the PD route for the duration of the lease time. The Prefix Stability feature allows an IPv6
gateway/CPE to move seamlessly to another C4/c CMTS while keeping the same IPv6 Prefix Delegation (PD), as long as
lease has not expired.
This section describes the CLI commands and provides sample configurations for the Prefix-Stability feature. Configuration
examples are provided for IS-IS and OSPFv3 (OSPF for IPv6) as IGPs used in the network: