# determining ethernet port speed in solaris **URL:** \ **Category:** UNIX for Advanced & Expert Users\ **Created:** [November 7, 2003, 3:32am UTC](https://community.unix.com/t/determining-ethernet-port-speed-in-solaris/147184 "2003-11-07T03:32:16Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![xyyz](https://community.unix.com/letter_avatar/xyyz/32/5_5575768a8748004e209b776fc1b2916d.png) [@xyyz](https://community.unix.com/u/xyyz)\ **Post date:** [November 7, 2003, 3:32am UTC](https://community.unix.com/t/determining-ethernet-port-speed-in-solaris/147184/1 "2003-11-07T03:32:16Z")
i purchased, what was labeled as a 4-port fast ethernet sbus card from ebay. i installed it in my ultra1, and it seems to be working fine. how can i determine if the card is infact a fast ethernet card vs. the standard ethernet 4-port card? ---
**Author:** ![Perderabo](https://community.unix.com/user_avatar/community.unix.com/perderabo/32/27_2.png) [@Perderabo](https://community.unix.com/u/Perderabo)\ **Post date:** [November 7, 2003, 5:06am UTC](https://community.unix.com/t/determining-ethernet-port-speed-in-solaris/147184/2 "2003-11-07T05:06:27Z")
Look at the man page for the driver it's using. Fast ethernet drivers will have features to change speed and turn autoneg on and off. The only fast 4-port card I know is qfe and "man qfe" describes what it can do. But there may be others. ---
**Author:** ![xyyz](https://community.unix.com/letter_avatar/xyyz/32/5_5575768a8748004e209b776fc1b2916d.png) [@xyyz](https://community.unix.com/u/xyyz)\ **Post date:** [November 7, 2003, 7:27am UTC](https://community.unix.com/t/determining-ethernet-port-speed-in-solaris/147184/3 "2003-11-07T07:27:46Z")
hmmm... i'd still like to know if there is a specific command... but i got lazy and looked at the switch lights... it is a 10/100 4-port card 🙂 ---
**Author:** ![rhfrommn](https://community.unix.com/letter_avatar/rhfrommn/32/5_5575768a8748004e209b776fc1b2916d.png) [@rhfrommn](https://community.unix.com/u/rhfrommn)\ **Post date:** [November 7, 2003, 11:03am UTC](https://community.unix.com/t/determining-ethernet-port-speed-in-solaris/147184/4 "2003-11-07T11:03:25Z")
You could use the ndd command to show you the settings for your interfaces. I don't remember the exact options you'd use, but if you do ndd /dev/tcp \? it will show you the list of parameters ndd can report. One of them should certainly be able to tell you the speed. ---
**Author:** ![Perderabo](https://community.unix.com/user_avatar/community.unix.com/perderabo/32/27_2.png) [@Perderabo](https://community.unix.com/u/Perderabo)\ **Post date:** [November 7, 2003, 1:36pm UTC](https://community.unix.com/t/determining-ethernet-port-speed-in-solaris/147184/5 "2003-11-07T13:36:05Z")
The tcp driver won't know the link speed. How could it? There could be many links. You have to ask the card's driver. ndd /dev/qfe instance n -get \? would show the possible parameters for a qfe card. But unless you're already familiar with the qfe driver, you would probably do a "man qfe" first. And in any event you're back to needing to know the driver's name. ---
**Author:** ![rhfrommn](https://community.unix.com/letter_avatar/rhfrommn/32/5_5575768a8748004e209b776fc1b2916d.png) [@rhfrommn](https://community.unix.com/u/rhfrommn)\ **Post date:** [November 7, 2003, 3:56pm UTC](https://community.unix.com/t/determining-ethernet-port-speed-in-solaris/147184/6 "2003-11-07T15:56:15Z")
That's right of course. Use ndd on the particular interface, not on tcp itself. Now that you wrote that, I remember the ndd commands I was using to set link speeds were all done with /dev/qfe just like you say. Sorry I messed it up the first time. ---
**Author:** ![xyyz](https://community.unix.com/letter_avatar/xyyz/32/5_5575768a8748004e209b776fc1b2916d.png) [@xyyz](https://community.unix.com/u/xyyz)\ **Post date:** [November 7, 2003, 7:50pm UTC](https://community.unix.com/t/determining-ethernet-port-speed-in-solaris/147184/7 "2003-11-07T19:50:20Z")
danke to you both... this goes in curious infomation file. 🙂 ---
**Author:** ![kduffin](https://community.unix.com/user_avatar/community.unix.com/kduffin/32/105_2.png) [@kduffin](https://community.unix.com/u/kduffin)\ **Post date:** [November 12, 2003, 1:11am UTC](https://community.unix.com/t/determining-ethernet-port-speed-in-solaris/147184/8 "2003-11-12T01:11:45Z")
[http://www.duffin.org/solaris/niccontrol.html](http://www.duffin.org/solaris/niccontrol.html) Cheers, Keith