speed of network connection

[Rick Stevens]

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 at 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


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- Rick Stevens, Principal Engineer             rstevens at internap.com -
- CDN Systems, Internap, Inc.                http://www.internap.com -
-                                                                    -
-   You possess a mind not merely twisted, but actually sprained.    -
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