Installing and Administering HP FDDI/9000 Software

Chapter 1 19
FDDI Resources
HP FDDI Device Files
HP FDDI Device Files
Device files are used to identify the HP FDDI driver and card. Each
driver/ card is associated with a device file. By convention, device files
are kept in a directory called /dev, with each device file having a name
and device number to uniquely identify the above characteristics. For
each HP FDDI card that is bound successfully to the I/O subsystem at
boot-up, the system creates FDDI device files by default: /dev/lanX. The
card instance number is concatenated to the device file names.
Once your system is rebooted, log on and follow the steps below to verify
the FDDI device files. If the major numbers or minor numbers are not
correct, delete the device file entries from your /dev directory and
recreate them with the correct numbers using the mknod(1M) command.
1. Execute the lanscan command.
2. Obtain a listing of the LAN device files.
ls -l /dev/lan*
3. Compare the lanscan output with the device file listing to verify that
the major and minor numbers are correct.
When looking at the device file listing, the fifth column is the major
number. The sixth column is the minor number, 0xnn0000 where nn
is the byte for the card instance number.
Series 800 Device Files Example
This example is for a Series 800 Model F20 with one LAN interface and
one FDDI interface. The lanscan command provides the following
output.
Hardware Station Crd Hdw Net-Interface NM MAC HP-DLPI DLPI
Path Address In# State NamePPA ID Type SUPPORT Mjr#
48 0x08000962FCBC 0 UP lan0 4 FDDI YES 52
56.1 0x08000914640C 1 UP lan1 5 ETHER YES 111
To create device files manually for an FDDI device at hardware path 48,
run the command: /usr/sbin/mknod /dev/lan1 c 191 0x01000. In
this example, the c is for character device, the 191 is the major number,
and the nn in 0xnn0000 is the card instance number (Crd In#) 1 = 01, 2 =
02. See the mknod(1M) man page for detailed information.