Chnage nic speed
Chnage nic speed
(OP)
Hi, i'm tryng to chnage the NIC speed without loss of connectivity. I'm using an UBUNTU desktop PC and i've used the command ethtool -s eth0 speed 100 to change the speed, but it put down the link and restart it with the new speed. Is there a faster way to change the speed?
thanks
thanks
RE: Chnage nic speed
Lets say your PC and it's switch have auto-negotiated a 100/full duplex connection and you change your PC's connection to 10/half. The switch then realizes that it can no longer reach your PC at 100/Full and begins a new auto-negotiation cycle. When it finds your NIC at 10/half it will connect again at that speed/duplex.
In theory you could manually configure both devices at once, but I have no idea how to do so in practice. And I bet there still would be a period of non-connectedness.
You are not just changing the speed at one end, both ends need to be in sync.
I tried to remain child-like, all I achieved was childish.
Tsar of all the Rushers
RE: Chnage nic speed
http://arstechnica.com/civis/viewtopic.php?p=16053...
I tried to remain child-like, all I achieved was childish.
Tsar of all the Rushers
RE: Chnage nic speed
If you change the speed, that resets the interface, so it renegotiates on the way back up.
For example, you have 2 facing interfaces, both set to auto/auto. They have autonegotiated 100/Full.
- If you change one end to 100/Full instead of Auto/auto, both will remain on 100/Full. Next time you reset the interface, the one set to auto/auto will fail to negotiate and autodetect the speed as 100 and set the duplex to whatever the default value is - usually 100/Half (stupidly).