Sun Microsystems 1.0 - Manual (Page 112)

86 SunFDDI/P 1.0 Adapter User’s Guide—May 1997
8
Changing the Default MAC Address (pf_macid)
Each attachment to an FDDI network is identified by a unique 48-bit MAC
address. By default, the first SunFDDI/P card takes the host-resident MAC
address, which is stored in nonvolatile memory (NVRAM) on the motherboard
of the machine. Each subsequent SunFDDI/P card adopts the card-resident
MAC address stored in its own IDPROM.
In general, this convention is sufficient to ensure that each SunFDDI/P card
installed in the machine has a unique
MAC address. However, there may be a
conflict with other LAN interfaces that also take the host-resident MAC
address—for example, an Ethernet ( le ) interface, or a SunFDDI/P 2.0 ( bf )
interface. In this event, change the default MAC address assigned to the first
SunFDDI/P card installed in the system.
▼ To Change the Default MAC Address with pf_macid
Use the pf_macid(1M) utility to recover the card-resident MAC address, and
then modify the system files to override the default MAC address:
1. Log in as root or become superuser.
2. Use the pf_macid(1M) utility to recover the MAC address from the
IDPROM on the SunFDDI/P interface identified by the instance number
.
3. Modify the start-up file on your machine so that the MAC address is
assigned correctly when the system is rebooted.
# /pf_macid pf