IPv6 addressing for initial connection

When you use IPv6 addressing, use the IPv6 link-local address to complete the initial connection to the CMM.

The link-local address is a unique IPv6 address for the CMM that is automatically generated according to its MAC address. It is of the form FE80::3BA7:94FF:FE07:CBD0.

Determine the link-local address of the CMM in any of the following ways:

• Read the CMM link-local address on the network access tag that is attached to the front of the CMM (see ../com.lenovo.acc.cmm.doc/cmm_connect_info.html for information). Note that the network access tag might have been removed from your CMM during installation.
• If you are able to log in to the CMM command-line interface (CLI) using IPv4 addressing, view the link-local address by using the ifconfig command (see ../com.lenovo.acc.cmm.doc/cli_command_ifconfig.html for information about command use).
• If you are able to log in to the CMM web interface using IPv4 addressing, view the link-local address on the IPv6 page on the Ethernet page on the Network Protocol Properties page (select Network from the Mgt Module Management menu). All fields and options are fully described in the CMM web interface online help.

If the CMM does not have a network access tag and you are unable to access the CMM by using IPv4, complete the following steps to calculate link-local address:

1. Write down the MAC address of the CMM. It is on a label on the CMM, near the reset button. The label reads MMxxxxxxxxxxxx, where xxxxxxxxxxxx is the MAC address. For example:

   39-A7-94-07-CB-D0

2. Split the MAC address into two parts and insert FF-FE in the middle.
   For example:

   39-A7-94-FF-FE-07-CB-D0

3. Convert the two hexadecimal digits at the left end of the string to binary.
   For example:

   • 39-A7-94-FF-FE-07-CB-D0
   • 00111001-A7-94-FF-FE-07-CB-D0
4. Invert the value of bit 7 of the binary string.
   For example:

   • 00111001-A7-94-FF-FE-07-CB-D0
   • 00111011-A7-94-FF-FE-07-CB-D0
5. Convert the binary digits at the left end of the string back to hexadecimal.
   For example:

   • 00111011-A7-94-FF-FE-07-CB-D0
   • 3B-A7-94-FF-FE-07-CB-D0
6. Combine the hexadecimal digit pairs into 4-digit groups.
   For example:

   • 3B-A7-94-FF-FE-07-CB-D0
   • 3BA7-94FF-FE07-CBD0
7. Replace dash (-) separators with colon (:) separators.
   For example:

   • 3BA7-94FF-FE07-CBD0
   • 3BA7:94FF:FE07:CBD0
8. Add FE80:: to the left of the string.
   For example:

   FE80::3BA7:94FF:FE07:CBD0

For a MAC address of 39-A7-94-07-CB-D0, the link-local address that is used for initial IPv6 access is FE80::3BA7:94FF:FE07:CBD0.