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Enabling or disabling router-advertisement messages

Enabling or disabling router-advertisement (RA) messages enables you to control the routing configuration for selecting the correct network interface to communicate with its neighbors. The prefix information option in a RA message is used by the storage system to configure routes or autoconfigure IPv6 addresses as part of stateless autoconfiguration.

About this task

  • By default, the option is set to on.
  • If you do not want the MAC address of the network interfaces to be viewed by any network for security reasons, you can disable the RA address autoconfiguration.
  • Disabling the RA option does not remove the existing autoconfigured addresses and the existing routes.
  • When the RA option is disabled, the RA message is dropped.

    Therefore, default route is not learned dynamically, the default router failover is disabled, and link MTU updates stop. You can still configure default routes statically.

  • You should not use autoconfigured addresses for configuring any vFiler unit.

    However, if you want to assign any autoconfigured address to a vFiler unit, then you must disable the RA address autoconfiguration prior to address assignment.

  • You should not use the IPv6 prefix advertised by the local router for static configuration.

    You should not statically configure the non-default vFiler units with the same IPv6 addresses that are generated by the autoconfiguration.

Step

  1. To enable or disable RA address autoconfiguration, enter the following command:
    options ip.v6.ra_enable {on|off}

    on—Accepts the RA messages

    off—Rejects or drops the RA messages