Users Guide

The FlexAddress feature card contains a range of MAC addresses. Before installing FlexAddress, you can determine the range of MAC
addresses contained on a FlexAddress feature card by inserting the SD card into an USB Memory Card Reader and viewing the
pwwn_mac.xml le. This clear text XML le on the SD card contains an XML tag mac_start that is the rst starting hex MAC address that
is used for this unique MAC address range. The mac_count tag is the total number of MAC addresses that the SD card allocates. The total
MAC range allocated can be determined by:
<mac_start> + 0xCF (208 - 1) = mac_end
where 208 is the mac_count and the formula is:
<mac_start> + <mac_count> - 1 = <mac_end>
For example:
(starting_mac)00188BFFDCFA + (mac_count)0xCF - 1 = (ending_mac)00188BFFDDC8
NOTE: Lock the SD card prior to inserting in the USB Memory Card Reader to prevent accidently modifying any of the contents.
You
must unlock
the SD card before inserting into CMC.
About FlexAddress Plus
The FlexAddress Plus is a new feature added to the feature card version 2.0. It is an upgrade from FlexAddress feature card version 1.0.
FlexAddress Plus contains more MAC addresses than the FlexAddress feature. Both features allow the chassis to assign World Wide
Name/Media Access Control (WWN/MAC) addresses to Fibre Channel and Ethernet devices. Chassis assigned WWN/MAC addresses are
globally unique and specic to a server slot.
FlexAddress and FlexAddress Plus Comparison
FlexAddress has 208 addresses divided into 16 server slots, thus each slot is allocated with 13 MACs.
FlexAddress Plus has 2928 addresses divided into 16 server slots, thus each slot is allocated with 183 MACs.
The following table shows the provision of the MAC addresses in both the features.
Table 36. Provision of MAC addresses in FlexAddress and FlexAddress Plus
Fabric A Fabric B Fabric C iDRAC Management Total MACs
FlexAddress 4 4 4 1 13
FlexAddress Plus 60 60 60 3 183
178 Using FlexAddress and FlexAdress Plus Cards