Can not change the Duplex mode to FULL

[mudongxiao]

I logon root
then run sam to change the network card to
Full mode for Duplex field.
But I can not change it for there is no drop-down box, only show me HALF(grey).
So, How can I change it?

[IT_2007]

you can use command line to change it.

To check:

lanadmin -x 0 --> 0 for Card Instance no.

To change:

lanadmin -x 100FD 0 --> will change to 100 Full Duplex for lan0.

[mudongxiao]

Thanks
But it failed

# lanadmin -x 0
Speed = 100 Half-Duplex.
Autonegotiation = On.

# lanadmin -x 100FD 0
The option "100FD" is not valid
speed Display the speed and duplexity of the link
fctrl Display whether Receive Flow Control is enabled or not
cko Determine if hardware TCP/UDP (IPv4) checksum offload is enabled
send_max_bufs Display the value of send buffer coalescing threshold
recv_max_bufs Display the value of recv buffer coalescing threshold
send_coal_ticks Display the value of send interrupt coalescing ticks
recv_coal_ticks Display the value of recv interrupt coalescing ticks
itrmode Display the value of interrupt throttling mode
card_info Display the adapter and driver revision and settings
vmtu Display the value of Virtual MTU for TCP Segmentation Offload
stats drv Display driver and adapter statistics
diag_thresh Display the value of packet rate threshold for diagnostics

[IT_2007]

You have to use -X (capital letter) to change settings.

[mudongxiao]

It works
What's the command to change back to
HALF mode
thanks again

[IT_2007]

why do you want to change it back to Half duplex?

Anyway, you can do it as same command with 100HD option

[IT_2007]

If you feel your problem solved, please assign points and close the thread.

Thanks.

[Ivan Krastev]

To get a list of adapters:

HP-UX 10.x uses the Network Management IDs
lanscan -n

HP-UX 11.x uses the PPA numbers
lanscan -p

To check the duplex:
lanadmin -x NMid# (HP-UX 10.x)
lanadmin -x PPA# (HP-UX 11.x)

To force to full duplex:
lanadmin -X 100FD NMid# (HP-UX 10.x)
lanadmin -X 100FD PPA# (HP-UX 11.x)

To force to half duplex:
lanadmin -X 100HD NMid# (HP-UX 10.x)
lanadmin -X 100HD PPA# (HP-UX 11.x)


regards,
ivan

[rick jones]

What kind of system (eg the output of the model command) is this and what sort of NIC. Old EISA 100BT NICs could only do half-duplex and didn't autoneg IIRC.

Also, the "core" interface on older servers was a 10 Mbit/s interface which was also only half-duplex.

Generally speaking, unless and until it is _known_ that autoneg is fubar on a switch, one shouldn't be trying to hardcode duplex settings for NICs and switch ports.