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Configuration Guide - IP Service

CloudEngine 8800, 7800, 6800, and 5800 V200R002C50

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

IPv6 transition technology is a basic feature of a device and is not under license control.

Version Requirements

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

Product

Minimum Version Required

CE8850-32CQ-EI V200R002C50
CE8850-64CQ-EI V200R005C00
CE8860EI V100R006C00
CE8861EI V200R005C10
CE8868EI V200R005C10
CE7850EI V100R003C00
CE7855EI V200R001C00
CE6810EI V100R003C00
CE6850EI V100R003C00
CE6850-48S6Q-HI V100R005C00
CE6850-48T6Q-HI/CE6850U-HI/CE6851HI V100R005C10
CE6855HI V200R001C00
CE6856HI V200R002C50
CE6857EI V200R005C10
CE6860EI V200R002C50
CE6865EI V200R005C00
CE6870-24S6CQ-EI/CE6870-48S6CQ-EI V200R001C00
CE6870-48T6CQ-EI V200R002C50
CE6875-48S4CQ-EI V200R003C00
CE5810EI V100R003C00
CE5850EI V100R003C00
CE5850HI V100R003C00
CE5855EI V200R002C50

Feature Limitations

When deploying IPv6 transition technology on the switch, pay attention to the following:
  • In versions earlier than V200R002C50, the CE5855EI does not support IPv6 transition technology. However, interfaces on a CE5855EI provide the IPv6 transition technology capability when the switch functions as a leaf switch in a super virtual fabric (SVF) system and the SVF forwarding mode is set to centralized or hybrid.
  • 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 for CE6870EI and CE6875EI 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: 2019-03-21

Document ID: EDOC1000166635

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