full or half dulplex mode of the NIC

[Shivkumar]

Hi,

What are the commands to find out all the network cards installed on the system are in full or half duplex mode ?
If a physical NIC is configured in full duplex mode then it's all virtual network interface will also be in full
duplex mode ?


Thanks,
Shiv

[Sanjay_6 · Accepted solution]

Hi shiv,

Try lanadmin

for lan0
# lanadmin -s 0
OR #lanadmin -s PPA

to get the PPA number of the card do a lanscan
#lanscan

Check the 3rd column in the lanscan o/p

Hope this helps.

regds

[A. Clay Stephenson]

-s displays speed; use lanadmin -x NMID to display speed, duplex, and negotiation settings. NOTE: -x is not supported on all NIC's so it may print an error on stderr and exit with a non-zero status.

[YoungHwan, Ko]

Hi Shivkumar..
This is an example

test01[/]# ioscan -funC lan
Class I H/W Path Driver S/W State H/W Type Description
===================================================================
lan 0 0/1/2/0 igelan CLAIMED INTERFACE HP A6825-60101 PCI 1000Base-T Adapter

test01[/]# lanadmin -s 0
Message catalog can't be opened/accessed for language ko_KR.eucKR.
Language C will used.
Speed = 100000000
test01[/]# lanadmin -x 0
Message catalog can't be opened/accessed for language ko_KR.eucKR.
Language C will used.
Speed = 100 Full-Duplex.
Autonegotiation = On.

To modify this use SAM.
# sam -> Networking and Communications -> Network Interface Cards -> Select lan card and on the menubar select Action -> Modify

[rick jones]

Do you mean the vlans? Yes, they will all share the same duplex setting. Duplex is a feature of the hardware. I've attached something I often trot-out when people ask about duplex.

[sysadm_1]

Hi Shiv,

Either use the lanadmin program or command
lanadmin -x 0 for each interface

cheers!!
sysadm

[Steven E. Protter]

Shalom Shiv,

ioscan -funC lan | awk '{print $2}' > file

while read -r lannum
do
lanadmin -x $lannum
lanadmin -s $lannum

done < file

[Arunvijai_4]

Hi Shiv,

You can also do with SAM,

# sam --> Networking and Communications --> Network Interface Cards

-Arun