ethernet autonegotiation

[tempest92]

hi guys,

is there a way to check what an ethernet card has actually auto negotiated to, when the card media_speed attribute is Auto_Negotiation.

thanks

gary.

 

[RMGBELGIUM]

It autonegotiates with the port of the switch it has been plugged in

greetz

RMGBelgium

 

[MikeLacey]

Hmph - sometimes it does yes. Best to explicitly set it.

Mike

"Deliver me from that bane of civilised life; teddy bear envy."

Want to get great answers to your Tek-Tips questions? Have a look at faq219-2884

 

[rneve]

Most of the time I have problems when I set the 10/100 MB ethernetcard to autonegotiate. The best is to set the speed fixed!
Only when you use a 10/100/1000MB ethernetcard you can fix the card to 10MB or 100MB. When you want the card to run 1000MB you must set it to autonegotiate!

Regards

 

[MoshiachNow]

I think you are looking for this :

entstat -d ent0 | awk '/Speed Running/ { print 4,$5,$6,$7 }'


Long live king Moshiach !

http://www.7for70.com/

 

[letis]

hello,

entstat -d ent0

for example.


Somewhere in the output (around 80 lines) you have something like :
Link status : up (cable and switch/hib are ok's).
Media Speed selected : Autonegociate (how the adapter is configured)
Media speed runing : 100 Mbits full-duplex (as it says).

regards,

 

[tempest92]

thanks guys.

i understand that it SHOULD negotiate to what is set on the port on the switch but how do i prove this ? i.e. my network guys says the port on the switch is 100/full duplex and lsattr (on aix) shows the media_speed of auto_negotiate but how do i actually check (from aix) what the card has negotiated to ?

 

[MoshiachNow]

Again :

entstat -d ent0 | awk '/Speed Running/ { print 4,$5,$6,$7 }'


Long live king Moshiach !

http://www.7for70.com/

 

[tempest92]

thanks letis and MoshiachNow......exactly what was i after.

thanks again..........gary.