Sun Fire T2000 Server
 

GCS>Sun Microsystems>Sun FAB>Standard>Reactive
 

• Part No: F501-7130-xx
• Part Description: FRU,BRD,OSP,ONTARIO

The Sun Fire T2000 MAC address label defines ten MAC addresses allocated to the system: the address printed on the label and nine other consecutive addresses. If the number on the Service Processor (ALOM) board MAC address label is an odd number the system MAC address will not match the label. When the MAC address label is odd the system MAC address will be the label address incremented by one.

Physically check the MAC address on the CIS sheet and the MAC address label on the F501-7130-xx System Controller Card (ALOM) and compare them with the system MAC address. The following commands can be used to identify the system MAC address:

1) From the sc:

sc> showsc sys_enetaddr

00:03:ba:d8:cc:bc

2) From OBP:

ok banner

Sun Fire T200, No Keyboard

Copyright 2005 Sun Microsystems, Inc. All rights reserved.

OpenBoot 4.19.0, 4088 MB memory installed, Serial #64533396.

Ethernet address 0:3:ba:d8:b3:94, Host ID: 83d8b394.

Note: If the MAC address label is ODD, AND the address on the CIS sheet matches the system MAC address, AND they are both one more than the MAC address label, then this FIN explains why they are different.

The system MAC address on the Sun Fire T2000 Server is one more than the address indicated on the MAC address label when the MAC address label contains an odd address.

The dual ethernet port controller used on the Sun Fire T2000 has a register that contains only one MAC address. The address for the second ethernet port is derived from the first address by XORing the LSB. If the first address is odd the XOR results in a decrement. If the first address is even the XOR results in an increment. At power on, OBP loads the MAC address into the controller's MAC address register.

XORing an odd MAC address could result in an address prior to the first of the ten MAC address allocated to the system. This could create a conflict with another ethernet device. To eliminate this possibility, the Sun Fire T2000 always increments the MAC address by one prior to XORing the LSB. In the case of an ODD MAC address, this results in the system MAC address being the second address in the range of ten addresses allocated to the system.

There is not a problem with the Sun Fire T2000. This is purely an informational notice.

In the case of a MAC address range that starts with an ODD address, The MAC address label indicates the first of the 10 ethernet addresses allocated to the system. The system MAC address however WILL NOT be allocated to the first(odd) MAC address.

In the case of a MAC address range that starts with an EVEN address, The MAC address label indicates the first of the 10 ethernet addresses allocated to the system and the system MAC address WILL be allocated to the first MAC address.

None.

This solution has no attachment