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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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Configuring Global Unicast Addresses for Interfaces

Configuring Global Unicast Addresses for Interfaces

Context

A global unicast address is similar to an IPv4 public address and provided for the Internet Service Provider (ISP). A global unicast address can be generated by either of the following methods:

  • Generated in EUI-64 format: An IPv6 global unicast address in EUI-64 format contains a manually configured prefix and an automatically generated interface identifier.
  • Configured manually: You can manually configure an IPv6 global unicast address.
NOTE:

You can configure an interface with multiple global unicast addresses with different network prefixes.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number

    The specified interface view is displayed.

  3. On an Ethernet interface, run undo portswitch

    The interface is switched to Layer 3 mode.

    By default, an Ethernet interface works in Layer 2 mode.

    The mode switching function takes effect when the interface only has attribute configurations (for example, shutdown and description configurations). Alternatively, if configuration information supported by both Layer 2 and Layer 3 interfaces exists (for example, mode lacp and lacp system-id configurations), no configuration that is not supported after the working mode of the interface is switched can exist. If unsupported configurations exist on the interface, delete the configurations first and then run the undo portswitch command.

    NOTE:

    If many Ethernet interfaces need to be switched to Layer 3 mode, run the undo portswitch batch interface-type { interface-number1 [ to interface-number2 ] } &<1-10> command in the system view to switch these interfaces to Layer 3 mode in batches.

  4. Run ipv6 enable

    The IPv6 function is enabled on the interface.

    By default, the IPv6 function is disabled on an interface.

  5. Run either of the following commands to configure an IPv6 global unicast address for an interface:

    • Run ipv6 address { ipv6-address prefix-length | ipv6-address/prefix-length }

      An IPv6 global unicast address is manually configured.

    • Run ipv6 address { ipv6-address prefix-length | ipv6-address/prefix-length } eui-64

      An IPv6 global unicast address is generated in EUI-64 format.

    A global unicast address cannot be the same as its network prefix because an IPv6 address which is the same as its network prefix is a subnet-router anycast address reserved for a device. However, this rule does not apply to an IPv6 address with a 127-bit network prefix.

    NOTE:
    • The total number of global unicast addresses and anycast addresses configured on a service interface cannot exceed 16.
    • A maximum number of 8 global unicast addresses and 16 anycast addresses can be configured on a management interface. However, the total number of global unicast addresses and anycast addresses configured on a management interface cannot exceed 16.
    • For the CE12800E configured with FD-X series cards, before configuring IPv6 addresses with prefixes longer than 64 bits on a switch, run the assign forward ipv6 longer-mask resource command to specify the number of IPv6 addresses and routes with prefixes longer than 64 bits supported by the switch.

  6. Run commit

    The configuration is committed.

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Updated: 2019-04-18

Document ID: EDOC1100039535

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