Verify that your VMware appliance host machines to restrict IPv6 max address settings to the minimum required for system operation.

About this task

The max addresses setting determines how many global unicast IPv6 addresses are available to each interface. The default is 16, but you should set to exactly the number of statically configured global addresses required for your system.

Procedure

  1. Run the # grep [1] /proc/sys/net/ipv6/conf/*/max_addresses|egrep "default|all" command on the VMware appliance host machines to verify that they restrict IPv6 max addresses appropriately.

    If the host machines are configured to restrict IPv6 max addresses, this command will return values of 1.

    /proc/sys/net/ipv6/conf/all/max_addresses:1
    /proc/sys/net/ipv6/conf/default/max_addresses:1

    If the host machines are configured correctly, no further action is necessary.

  2. If you need to configure IPv6 max addresses on host machines, open the /etc/sysctl.conf file in a text editor.
  3. Check for the following entries.
    net.ipv6.conf.all.max_addresses=1
    net.ipv6.conf.default.max_addresses=1

    If the entries do not exist or if their values are not set to 1, add the entries or update the existing entries accordingly.

  4. Save any changes you made and close the file.