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Re: speed of network connection



On Tue, 2007-09-25 at 08:27 -0500, Aaron Konstam wrote:
> On Mon, 2007-09-24 at 17:09 -0700, Rick Stevens wrote:
> > On Mon, 2007-09-24 at 16:58 -0500, Aaron Konstam wrote:
> > > On Mon, 2007-09-24 at 19:43 +0200, Gilboa Davara wrote:
> > > > On Mon, 2007-09-24 at 13:34 -0400, Jon Shorie wrote:
> > > > > Does anyone know how I can find out the speed of my network connection on a 
> > > > > fedora machine?
> > > > > 
> > > > > On my ubunto boxen, I do a 
> > > > > 
> > > > > dmesg | grep eth0
> > > > > 
> > > > > and it usually tells me 
> > > > > 
> > > > > something like:
> > > > > 
> > > > > [   24.527986] eth0: no IPv6 routers present
> > > > > [ 2466.508627] e1000: eth0: e1000_watchdog: NIC Link is Down
> > > > > [ 2472.385648] e1000: eth0: e1000_watchdog: NIC Link is Up 1000 Mbps Full 
> > > > > Duplex
> > > > > 
> > > > > but on fedora, I get:
> > > > > 
> > > > > eth0: RTL8168b/8111b at 0xf883e000, 00:16:e6:6c:42:a1, IRQ 17
> > > > > r8169: eth0: link up
> > > > > r8169: eth0: link up
> > > > > eth0: no IPv6 routers present
> > > > > r8169: eth0: link down
> > > > > r8169: eth0: link up
> > > > > 
> > > > > a uname -r gives me:
> > > > > 2.6.20-1.2944.fc6
> > > > > 
> > > > > any suggestions?  I want to know if I am getting a 100 or 1000 mb/s 
> > > > > connection.
> > > 
> > > 
> > > > > Thank you
> > > > > 
> > > > > Jon Shorie
> > > > > Systems Administrator
> > > > > Medina County Sanitary Engineers
> > > > > 
> > > > 
> > > > $ ethtool ethX
> > > ethtool does not do this for me.
> > > I get:
> > > ethtool eth1
> > > Settings for eth1:
> > >         Link detected: yes
> > 
> > That's hard to believe for a wired card.
> > 
> > Settings for eth0:
> >         Supported ports: [ TP ]
> >         Supported link modes:   10baseT/Half 10baseT/Full 
> >                                 100baseT/Half 100baseT/Full 
> >                                 1000baseT/Full 
> >         Supports auto-negotiation: Yes
> >         Advertised link modes:  10baseT/Half 10baseT/Full 
> >                                 100baseT/Half 100baseT/Full 
> >         Advertised auto-negotiation: Yes
> > ------> Speed: 100Mb/s
> >         Duplex: Full
> >         Port: Twisted Pair
> >         PHYAD: 0
> >         Transceiver: internal
> >         Auto-negotiation: on
> >         Supports Wake-on: pumbg
> >         Wake-on: g
> >         Current message level: 0x00000033 (51)
> >         Link detected: yes
> > 
> > Is this a wireless card?  If so, you need to use iwconfig and look
> > for the "Bit Rate" value:
> > 
> > [root golem3 ~]# iwconfig wlan0
> > wlan0     IEEE 802.11g  ESSID:"mynetwork"  
> >           Mode:Managed  Frequency:2.452 GHz  Access Point:
> > 		xx:xx:xx:xx:xx:xx   
> > ------->  Bit Rate=54 Mb/s   
> >           Retry min limit:7   RTS thr:off   Fragment thr=2346 B   
> >           Encryption key:xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xx
> >           Link Quality=100/100  Signal level=-39 dBm  Noise level=-95
> > 		dBm
> >           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
> >           Tx excessive retries:0  Invalid misc:0   Missed beacon:0
> Exactly where in your posting did you say that ethtool only works on
> wired cards? 

I never did, but many wireless drivers don't support ethtool.  That's a
fact, not conjecture.  For example, the iwl4965 driver (with mac80211,
etc.) for my Intel card doesn't support ethtool or mii-tool:

	[root golem3 ~]# ethtool wlan0
	Settings for wlan0:
	No data available
	[root golem3 ~]# mii-tool wlan0
	SIOCGMIIPHY on 'wlan0' failed: Operation not supported

----------------------------------------------------------------------
- Rick Stevens, Principal Engineer             rstevens internap com -
- CDN Systems, Internap, Inc.                http://www.internap.com -
-                                                                    -
-     I was married by a judge.  I should have asked for a jury.     -
-                                                   -- Groucho Marx  -
----------------------------------------------------------------------


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