Enabling the IPv6–mode boot config flag

Enable this flag to support IPv6 routes with prefix-lengths greater than 64 bits.

This flag is disabled by default. Use this procedure to enable (set to true) the IPv6-mode boot config flag.

When the IPv6-mode boot config flag is enabled, the maximum number of IPv4 routing table entries decreases. For scaling information, see Release Notes for VOSS.

Procedure

  1. Enter Global Configuration mode:

    enable

    configure terminal

  2. Enable the IPv6-mode boot config flag:

    boot config flags ipv6-mode

  3. Save the configuration, and then reboot the switch for the change to the IPv6-mode boot config flag to take effect.
  4. After you reboot the switch, verify that the IPv6-mode boot config flag is set to true:

    show boot config flags

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