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Configuration Guide - IP Service

S2720, S5700, and S6720 V200R013C00

This document describes the configurations of IP Service, including IP address, ARP, DHCP, DHCP policy VLAN, DNS, mDNS gateway, mDNS relay, UDP Helper, IP performance optimization, IPv6, DHCPv6, IPv6 DNS, IPv6 over IPv4 tunnel, and IPv4 over IPv6 tunnel.
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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.

  • Manually configured global unicast addresses have a higher priority than automatically generated ones. Manually configured addresses can overwrite automatically generated ones with the same prefix. The overwritten automatically generated addresses do not take effect even if manually configured addresses are deleted. A device needs to generate a new global unicast address based on the IP prefix carried in the received RA packet.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run ipv6

    IPv6 packet forwarding is enabled.

    By default, IPv6 packet forwarding is disabled.

  3. Run interface interface-type interface-number

    The specified interface view is displayed.

  4. (Optional) 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.
    NOTE:

    Only the S5720EI, S5720HI, S5730HI, S6720EI, S6720HI, and S6720S-EI support switching between Layer 2 and Layer 3 modes.

  5. Run ipv6 enable

    The IPv6 function is enabled on the interface.

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

  6. 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.

    You can configure a maximum of 10 global unicast addresses on an interface.

Verifying the Configuration

  • Run the display ipv6 interface [ interface-type interface-number | brief ] command in any view to check IPv6 information about a specified interface.

  • Run the display this ipv6 interface command in the interface view to check IPv6 information about the current interface.

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Updated: 2019-04-20

Document ID: EDOC1100065678

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