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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 a CGA IPv6 Address

Configuring a CGA IPv6 Address


To enable IPv6 SEND to protect ND messages that carry CGA and RSA options, you need to configure a CGA IPv6 address on an interface that sends ND messages. After receiving the packet, the peer device uses the CGA option to authenticate the validity of source IP addresses carried in ND messages and the RSA option to authenticate the completeness of ND messages.


  1. Run system-view

    The system view is displayed.

  2. Run rsa key-pair label label-name [ modulus modulus-bits ]

    An RSA key pair is created.

  3. Run interface interface-type interface-number

    The view of the interface where a CGA IPv6 address needs to be configured is displayed.

  4. 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.


    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.

  5. Run ipv6 enable

    The IPv6 function is enabled on the interface.

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

  6. Run ipv6 security rsakey-pair label-name

    The RSA key pair is bound to the interface to generate a CGA address.

    By default, an RSA key pair is not bound to an interface.

    The RSA key pair is created using the rsa key-pair label label-name [ modulus modulus-bits ] command in step 2.

  7. Run ipv6 security modifier sec-level sec-value [ modifier-value ]

    The modifier value and security level are configured for the CGA address.

    By default, no modifier value or security level is set for a CGA address.

    The modifier value can be manually configured only when the security level of the CGA address is 0.

  8. Configuring a CGA IPv6 Address. Run the following commands as required. You can configure both the CGA link local address and global unicast address or one of them.

    • Run ipv6 address ipv6-address link-local cga

      A CGA IPv6 address is configured.

      By default, no link-local address is configured for an interface.

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

      A CGA global unicast address is configured.

      By default, no CGA global unicast address is configured.

  9. Run commit

    The configuration is committed.

Updated: 2019-04-18

Document ID: EDOC1100039535

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