What means "Advertised link modes"?

tombert · 01-15-2008, 04:53 PM

When doing "ethtool eth0" it tells me that my supported link modes are 10/100/1000 but the advertised are only 10/100?
Can someone please tell me whats the problem?

PS: I'am running openSuse 10.3 and the network cable I'am using is CAT6 but it still connects with 100 Mbps only.

thx

tombert · 01-16-2008, 02:17 AM

I already tried to set the "Advertised link modes" manually:

Code:

ethtool -s eth0 advertise 0x020

to GBit, but that doesn't help - the modes stay fixed at 10/100 and the connection stays at 100 MBit.

thx

shaybery · 01-22-2008, 04:16 PM

There is any way to change the Advertised link modes?

I what that my nic will be autoneg=on but only for 100Full or 1000Full only.
there is away to do that?

tombert · 01-23-2008, 02:51 AM

Quote:

Originally Posted by shaybery

There is any way to change the Advertised link modes?

I what that my nic will be autoneg=on but only for 100Full or 1000Full only.
there is away to do that?

As you see - there is a way. But on my system it doesnt help - maybe on yours ...

shaybery · 01-23-2008, 05:24 PM

which linux u have?
On redhat5.1 there is no option in the ethtool to do "advertise 0x020".

tombert · 01-24-2008, 01:06 AM

Quote:

Originally Posted by shaybery

which linux u have?
On redhat5.1 there is no option in the ethtool to do "advertise 0x020".

openSuse 10.3

lazlow · 01-24-2008, 02:52 AM

Tombert

You are aware that everything from end to end has to be GigE in order for you to use GigE. If there is a switch in between that is not GigE then it will not work.

You can shut the autonegotiate off and set the speed the 1000 (see man ethtool). Something like: ethtool eth0 -s speed 1000 autoneg off

tombert · 01-25-2008, 01:40 AM

The computers are directly connected.
But there is something I learned now: If the driver tells you about supported links modes that does not really mean that the LAN card supports it.
The guy who sold me board said it is 1 Gig - now I checked at the manufactures homepage. It is really 100 Mbits only.

thanks for your support to all - but its false alarm.

lazlow · 01-25-2008, 01:52 AM

tombert

I have picked up a lot of 3com GigE cards on Ebay for $15 (including shipping). A lot of companies are hurting for money and selling off their excess stock. Also when companies that have had GigE networks for a while updated their older computers they wound up with a ton of GigE cards (most new machines have it on the motherboard). Just make sure to check out the sellers reputation.

Good Luck
Lazlow

tombert · 01-27-2008, 02:16 PM

thanks ...