DLPI device for second card

[JUP]

I'm running HPUX 11.23i on a rx2620 box with 2 network cards. I have a program that opens up each network card device and reads transmits messages.

lanscan shows:

Hardware Station Crd Hdw Net-Interface NM MAC HP-DLPI DLPI
Path Address In# State NamePPA ID Type Support Mjr#
0/1/2/0 0x0013215B4608 0 UP lan0 snap0 1 ETHER Yes 119
0/1/2/1 0x0013215B4609 1 UP lan1 snap1 2 ETHER Yes 119

ls -l /dev/dlpi* shows

crw-rw-rw- 1 root sys 72 0x000077 Apr 2 09:13 /dev/dlpi
crw-rw-rw- 1 root sys 119 0x000000 Apr 2 09:13 /dev/dlpi0
crw-rw-rw- 1 root sys 119 0x000001 Apr 2 09:13 /dev/dlpi1
crw-rw-rw- 1 root sys 119 0x000002 Apr 2 09:13 /dev/dlpi2
crw-rw-rw- 1 root sys 119 0x000003 Apr 2 09:13 /dev/dlpi3
crw-rw-rw- 1 root sys 119 0x000004 Apr 2 09:13 /dev/dlpi4


I can open the device for the first card (/dev/dlpi). I am trying to open the device for the second card - what is the device. I think its /dev/dlpi also but with a PPA (Physical Point of Access) of 1 not 0.

Is that correct ? Can anyone please help out here.

Thanks in advance
JUP

[Ermin Borovac · Accepted solution]

LAN interfaces are named as lan, so you are right, PPA for the second card is 1.

You can access all LAN interfaces through single device file /dev/dlpi.

More information including some sample programs (in Appendix A) can be found in HP DLPI Programmer's Guide: HP-UX 11i v2 at

http://docs.hp.com/en/B2355-90871/index.html

[Duncan Edmonstone]

No, as I understand it, you should be using just /dev/dlpi. The difference between /dev/dlpi and /dev/dlpiN is that /dev/dlpi supports seperate streams for each open request wherease every /dev/dlpiN doesn't.

What I understand you are supposed to do is open /dev/dlpi and get a list of all available PPAs - have a look at the function attach() in the code here:

http://docs.hp.com/en/B2355-90138/ch02s01.html

HTH

Duncan

[JUP]

Thanks all - its been resolved.

/dev/dlpi for all devices and use PPA 0 for the first device, PPA 1 for second and so on.

Thanks again
JUP