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Configuration Guide - IP Service

CloudEngine 12800 and 12800E V200R005C00

This document describes the configurations of IP Service, including IP address, ARP, DHCP, DNS, IP performance optimization, IPv6, DHCPv6, and IPv6 DNS.
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IPv6 Provider Edge (6PE) technology allows ISPs to provide access services for scattered IPv6 networks over existing IPv4 backbone networks. The 6PE device converts IPv6 routes to labeled IPv6 routes and floods the routes on the ISP's IPv4/MPLS backbone network using Internal Border Gateway Protocol (IBGP) sessions. After receiving IPv6 packets entering the IPv4/MPLS backbone network, the 6PE device labels and then forwards the packets.

When the ISP wants to provide access services for an IPv6 network over the existing IPv4/MPLS backbone network, the ISP only needs to upgrade PE devices. Therefore, 6PE technology is a cost-effective solution to IPv4-to-IPv6 transition.

6PE only needs to be deployed on ISPs. User-side IPv6 networks can communicate with other IPv6 islands without requiring additional configurations and cannot detect the existence of the IPv4/MPLS backbone network.

Figure 10-6 shows 6PE implementation.
  • 6PE devices exchange IPv6 routing information with customer edges (CEs) using IPv6 routing protocols.
  • 6PE devices exchange IPv6 routing information with each other using the Multiprotocol-Border Gateway Protocol (MP-BGP) and allocate MPLS labels to IPv6 prefixes.
  • On the IPv4/MPLS backbone network, 6PE devices exchange IPv4 routing information with provider (P) devices using IPv4 routing protocols and establish label switched paths (LSPs) between 6PE devices using MPLS.
Figure 10-6 6PE implementation

Updated: 2019-04-18

Document ID: EDOC1100039535

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