Comments on: Linux LAN card: Find out full duplex / half speed or mode http://www.cyberciti.biz/faq/howto-setup-linux-lan-card-find-out-full-duplex-half-speed-or-mode/ Every answer asks a more beautiful question. Fri, 10 Feb 2012 19:55:56 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: mehttp://www.cyberciti.biz/faq/howto-setup-linux-lan-card-find-out-full-duplex-half-speed-or-mode/#comment-41629 me Fri, 15 May 2009 21:20:22 +0000 http://www.cyberciti.biz/faq/faq/linux-lan-card-find-out-full-duplexhalf-speed-or-mode.php#comment-41629 Bill: What is so devious about "dladm show-dev" ? Also yes windows is easier if you have graphical console but how do you do it on remote logi ? Bill: What is so devious about “dladm show-dev” ?
Also yes windows is easier if you have graphical console but how do you do it on remote logi ?

]]> By: reecehttp://www.cyberciti.biz/faq/howto-setup-linux-lan-card-find-out-full-duplex-half-speed-or-mode/#comment-40188 reece Mon, 09 Feb 2009 04:18:59 +0000 http://www.cyberciti.biz/faq/faq/linux-lan-card-find-out-full-duplexhalf-speed-or-mode.php#comment-40188 thanks a lot! thanks a lot!

]]> By: Bill Cunninghamhttp://www.cyberciti.biz/faq/howto-setup-linux-lan-card-find-out-full-duplex-half-speed-or-mode/#comment-39239 Bill Cunningham Sun, 16 Nov 2008 23:16:09 +0000 http://www.cyberciti.biz/faq/faq/linux-lan-card-find-out-full-duplexhalf-speed-or-mode.php#comment-39239 I'm the most rabid Linux preacher in the world, but checking link speed and duplex is one area where windoze is easier to work with. And think Linux is devious? Try it on Solaris. I’m the most rabid Linux preacher in the world, but checking link speed and duplex is one area where windoze is easier to work with.

And think Linux is devious? Try it on Solaris.

]]> By: vivekhttp://www.cyberciti.biz/faq/howto-setup-linux-lan-card-find-out-full-duplex-half-speed-or-mode/#comment-36964 vivek Fri, 26 Oct 2007 06:37:29 +0000 http://www.cyberciti.biz/faq/faq/linux-lan-card-find-out-full-duplexhalf-speed-or-mode.php#comment-36964 Only use ethtool as mii-tool is not compatible and it will be not included in future version Only use ethtool as mii-tool is not compatible and it will be not included in future version

]]> By: Shttp://www.cyberciti.biz/faq/howto-setup-linux-lan-card-find-out-full-duplex-half-speed-or-mode/#comment-36963 S Thu, 25 Oct 2007 22:39:36 +0000 http://www.cyberciti.biz/faq/faq/linux-lan-card-find-out-full-duplexhalf-speed-or-mode.php#comment-36963 ethtool, mii-tool and dmesg output show very different results first off mii-tool -v eth0 Output eth0: negotiated 10baseT-HD, link ok product info: vendor 00:50:ef, model 21 rev 1 basic mode: autonegotiation enabled basic status: autonegotiation complete, link ok capabilities: advertising: 100baseTx-HD 10baseT-HD link partner: 100baseTx-FD 10baseT-HD 2) ethtool eth0 Settings for eth0: Supported ports: [ FIBRE ] Supported link modes: 1000baseT/Full Supports auto-negotiation: Yes Advertised link modes: 1000baseT/Full Advertised auto-negotiation: Yes Speed: 1000Mb/s Duplex: Full Port: FIBRE PHYAD: 2 Transceiver: internal Auto-negotiation: on Supports Wake-on: d Wake-on: d Link detected: yes 3) dmesg | grep -i duplex bnx2: eth0 NIC Link is Up, 1000 Mbps full duplex bnx2: eth1 NIC Link is Up, 1000 Mbps full duplex Which one should be believed? mii-tool shows the nic is advertising 100baseT/HD but negotiated 10BaseT/HD (which is really slow for what we want to do); ethtool shows nic is advertising 1000Mb/s FD which, confirms with dmesg output. Conclusion? mii-tool may not be compatible with the fibre channel nics? How to interpret this output? ethtool, mii-tool and dmesg output show very different results

first off mii-tool -v eth0
Output
eth0: negotiated 10baseT-HD, link ok
product info: vendor 00:50:ef, model 21 rev 1
basic mode: autonegotiation enabled
basic status: autonegotiation complete, link ok
capabilities:
advertising: 100baseTx-HD 10baseT-HD
link partner: 100baseTx-FD 10baseT-HD

2)
ethtool eth0
Settings for eth0:
Supported ports: [ FIBRE ]
Supported link modes: 1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 1000baseT/Full
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: FIBRE
PHYAD: 2
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: d
Wake-on: d
Link detected: yes

3) dmesg | grep -i duplex
bnx2: eth0 NIC Link is Up, 1000 Mbps full duplex
bnx2: eth1 NIC Link is Up, 1000 Mbps full duplex

Which one should be believed? mii-tool shows the nic is advertising 100baseT/HD but negotiated 10BaseT/HD (which is really slow for what we want to do); ethtool shows nic is advertising 1000Mb/s FD which, confirms with dmesg output.

Conclusion? mii-tool may not be compatible with the fibre channel nics?

How to interpret this output?

]]> By: Fachtna Roehttp://www.cyberciti.biz/faq/howto-setup-linux-lan-card-find-out-full-duplex-half-speed-or-mode/#comment-36656 Fachtna Roe Tue, 17 Jul 2007 18:06:57 +0000 http://www.cyberciti.biz/faq/faq/linux-lan-card-find-out-full-duplexhalf-speed-or-mode.php#comment-36656 Thank you for that information, especially the name of that tool. Very useful. Again, Thanks. Thank you for that information, especially the name of that tool. Very useful. Again, Thanks.

]]> By: Suresh Yellayihttp://www.cyberciti.biz/faq/howto-setup-linux-lan-card-find-out-full-duplex-half-speed-or-mode/#comment-236 Suresh Yellayi Fri, 22 Sep 2006 08:57:07 +0000 http://www.cyberciti.biz/faq/faq/linux-lan-card-find-out-full-duplexhalf-speed-or-mode.php#comment-236 Very informative. Need some Real Time Datacenter , Linux Info.. Very informative. Need some Real Time Datacenter , Linux Info..

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