how to turn auto-negotiation off or on on lan1?

[Hanry Zhou]

I know I can use the command:
lanadmin -X 100FD 1
but, where is the option of turning auto-negotiation on or off?

Also, if it is the primary lan connection, do I have to do that on Console terminal? or Will I lost the connection while I am runing the command?

[Steven E. Protter]

Shalom Hanry,

Yes this is possible.

To know the exact location, I'd need to know your server type.

On many servers its hard coded into /etc/rc.config.d/hpbtlanconf

SEP

[DCE]

I have used SAM to change the auto-negotiation in the past. It is not as fast as the command line, but it will do the job.

Dave

[hailerer]

you can use lanadmin -X options,
for btlan,the valid types are: 10HD, 10FD, 100HD, 100FD, AUTO_ON

[Bill Hassell]

As mentioned, lanadmin -X is the tool to use. When you use lanadmin to change a LAN card setting like duplex, there can be about a 15 second outage while the card resets and establishes connection with the switch. Note that lanadmin is a temporary setting. To make the setting permanent, you need to configure the appropriate file in /etc/rc.config.d so the setting is setup the way you want it on reboot. Note that not all LAN cards (especially on older systems) will respond to every setting.

[Sivakumar TS]

Hi Hanry,

lanadmin -X AUTO_ON 1

will enable auto neg

Regards,

Siva.

[Sivakumar TS]

Hi,

the changes made in lanadmin are temporary only.

to make it permanant, as per SEP's reply you have to edit the appropriated file.

Regards,

Siva.

[RAC_1 · Accepted solution]

lanadmin -X auto_on/auto_off nmid_of_card

[rariasn]

Hi Hary,

View configuration

# lanscan

0/0/0/0 0x00306E0CFC53 0 UP lan0 snap0 1 ETHER Yes 119
0/6/0/0 0x00306E0C95DD 1 UP lan1 snap1 2 ETHER Yes 119

#lanadmin -s -x 1
Speed = 10000000
Current Config = NO LINK AUTONEG

# lanadmin -X 10FD 1

# lanadmin -s -x 1
Speed = 10000000
Current Config = 10 Full-Duplex MANUAL

#lanadmin -X AUTO_ON 1

#lanadmin -s -x 1
Speed = 10000000
Current Config = NO LINK AUTONEG

ran

[Hanry Zhou]

I thought I can do as suggested:
lanadmin -X AUTO_OFF 1
But, it is not working....
AUTO_OFF is unsupported option!

What is option to turn off the auto-negotiate?
Please help!

[Patrick Wallek]

When you manually set the speed on a card with lanadmin, then that turns auto_neg off.

# lanadmin -X 100FD 1

Will turn OFF auto neg and manually set the speed to 100FD.

[Hanry Zhou]

Since the card is currently ON, there is no way to turn if OFF directly. I would have to set it to something else, ex, lanadmin -X AUTO_ON 1 first, then lanadmin -X 100FD 1.

[Bill Hassell]

By definition, you must pick a speed to turn off auto-negotiation. You can't just turn off the autonegotiation because there is no defined speed or duplex. Note that with 100 Mbit LAN systems, the switch port will have to be changed to a fixed speed and duplex too.