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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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Licensing Requirements and Limitations for IPv6 Transition Technology

Licensing Requirements and Limitations for IPv6 Transition Technology

Involved Network Elements

Other network elements are not required.

Licensing Requirements

The IPv6 transition technology is controlled by a license. By default, this function is disabled on a new device. To use the IPv6 function, apply for and purchase the license from the device supplier.

Version Requirements

Table 10-1 Products and minimum version supporting IPv6 transition technology

Product

Minimum Version Required

CE12804/CE12808/CE12812/CE12816

V100R003C00

CE12804S/CE12808S

V100R005C00

Feature Limitations

When deploying IPv6 transition technology on the switch, pay attention to the following:
  • Only the Admin-VS among all VSs in port mode supports the configuration of IPv6 transition technology.
  • The switch does not support multilayer IPv6 transition encapsulation or decapsulation.
  • Two tunnel interfaces with the same source address and destination address cannot be configured simultaneously.
  • The QoS mapping rules of an IP Tunnel are as follows:
    • Encapsulation of incoming packets:
      1. The DSCP value of the inner IP header is changed. The new DSCP value is mapped based on the internal priority and DiffServ default profile. The internal priority is obtained based on the DiffServ domain profile bound to the Layer 3 inbound interface.
      2. The DSCP value of the outer IP header is mapped based on the internal priority and the DiffServ domain profile bound to the outbound interface. The internal priority is obtained based on the new DSCP value of the inner IP header and the DiffServ default profile.
    • Decapsulation of outgoing packets: The DSCP value of the inner IP header is mapped based on the internal priority and the DiffServ domain profile bound to the outbound interface. The internal priority is obtained based on the DSCP value of the outer IP header and the DiffServ default profile.
  • CE series switches do not support packet fragmentation and reassembly. If a CE switch works as the destination endpoint of a tunnel and receives a fragmented packet, the switch fails to decapsulate the packet and discards the packet. To ensure that packets are not fragmented on a network, reduce the length of packets sent by the data source and increase the MTU of routers that support packet fragmentation on the entire network.
  • After packets are encapsulated and transmitted over an IPv6 over IPv4 tunnel, the packets cannot be encapsulated again for transmission over another tunnel.
  • An IPv6 over IPv4 automatic tunnel only supports BGP4+ protocol packets.
  • An IPv6 over IPv4 tunnel does not support ECMP and Eth-Trunk load balancing based on the inner IPv6 header on the ingress and transit nodes of the tunnel.
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Updated: 2019-04-18

Document ID: EDOC1100039535

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