How to find out the speed of LAN interface

[KapilRaj]

Hello,

Is there a command to find out the speed at which a LAN interface is running in SuSE Linux.

I could locate two interfaces at 100 Mbps in dmesg (not sure if thats the correct method) , Still I could not locate the other two interfaces installed on my Node.

I hv four ethernet adapters in my node , And i want to check at what speed they are running.

Regds,

Kaps

[Mark Grant]

"mii-tool" often does the trick

[KapilRaj]

Mark,

I need more help !

# mii-tool -v
SIOCGMIIPHY on 'eth0' failed: Operation not supported
SIOCGMIIPHY on 'eth1' failed: Operation not supported
no MII interfaces found
#

Regds,

Kaps

[Mark Grant]

Hmm, that's irritating then.

In this case, I think it is dependent on what device you have. I know for some cards the only way you can know is to set the value yourself at boot time.

Can you tell us what cards you have.

[KapilRaj]

Mark,

I normally work on HPUX & AIX not Linux. Hence I collected the following details from dmesg. If u could space some more time to let me know what command u would like me to use,

dmesg says,

*************************
eth2: OEM i82557/i82558 10/100 Ethernet, 00:02:B3:BC:9E:0B, IRQ 18.
Board assembly a57171-003, Physical connectors present: RJ45
Primary interface chip i82555 PHY #1.
Secondary interface chip i82555.
General self-test: passed.
Serial sub-system self-test: passed.
Internal registers self-test: passed.
ROM checksum self-test: passed (0xb874c1d3).
eth3: OEM i82557/i82558 10/100 Ethernet, 00:02:B3:BC:9E:0C, IRQ 19.
Board assembly a57171-003, Physical connectors present: RJ45
Primary interface chip i82555 PHY #1.
Secondary interface chip i82555.
General self-test: passed.
Serial sub-system self-test: passed.
Internal registers self-test: passed.
ROM checksum self-test: passed (0xb874c1d3).


eth0: Broadcom BCM5703 1000Base-T found at mem f8ff0000, IRQ 24, node addr 00096b8cdeac
eth0: Broadcom BCM5703 Integrated Copper transceiver found
eth0: Scatter-gather ON, 64-bit DMA ON, Tx Checksum ON, Rx Checksum ON
eth1: Broadcom BCM5703 1000Base-T found at mem f8fe0000, IRQ 25, node addr 00096b8cdead
eth1: Broadcom BCM5703 Integrated Copper transceiver found
eth1: Scatter-gather ON, 64-bit DMA ON, Tx Checksum ON, Rx Checksum ON
bcm5700: eth0 NIC Link is UP, 100 Mbps full duplex
bcm5700: eth1 NIC Link is UP, 100 Mbps full duplex
*************************

From here i could make out eth0 & eth1 are running at 100 Mbps Full Duplex but no info regarding eth3 & 4.

Regds,

Kaps

[Alexander Chuzhoy]

try ethtool
read man for more info...

[KapilRaj]

Mark,

Sorry the err came on the wriong node .. On this node mii-tool -v gives me,

eth0: 100 Mbit, full duplex, link ok
product info: vendor 00:08:18, model 22 rev 2
basic mode: 100 Mbit, full duplex
basic status: link ok
capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
advertising: 100baseTx-FD
eth1: 100 Mbit, full duplex, link ok
product info: vendor 00:08:18, model 22 rev 2
basic mode: 100 Mbit, full duplex
basic status: link ok
capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
advertising: 100baseTx-FD
eth2: negotiated 100baseTx-FD flow-control, link ok
product info: Intel 82555 rev 4
basic mode: autonegotiation enabled
basic status: autonegotiation complete, link ok
capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
advertising: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control
link partner: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control
eth3: no link
product info: Intel 82555 rev 4
basic mode: autonegotiation enabled
basic status: no link
capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
advertising: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control

But it doesn't show at what speed eth3 & 4 are running , basic mode is Auto negotiation .. How can I find at what speed they have negotiated ?.

Regds,

Kaps

[KapilRaj]

Alexander,

# man ethtool
No manual entry for ethtool
# which ethtool
#

I hope it is on a diffrent OS not SuSE Linux
Or is it a freeware which i can download and use ?.


Kaps

[Alexander Chuzhoy]

yes actually it's on redhat and there's a RPM
call ethtool shipped with redhat installation CD.
you can download the precompiled tar.gz from:

http://sourceforge.net/project/showfiles.php?group_id=3242&package_id=19201&release_id=172583

[Roberto Polli]

did you look for it in /proc ?
you can search for flags listed in

modinfo ETH_MODULE_NAME

using
find /proc/ -type f -exec grep -il \;

or something of that kind.

Pax, R>

[Mark Grant]

Are those two extra cards actually configured?

Doesn't look like it at first glance.

[Mark Grant · Accepted solution]

Actually Kapil, mii-tool does seem to be showing you eth3.

Remember we start at eth0 so the output for eth2 is your third card and it says that it is 100baseTx-FD. eth3 should be your fourth card and it just says "no link" which I would suspect means it isn't plugged into anything.

[Bill Thorsteinson]

You can specify which device on the command line
such as

mii-tool -v eth0

If it report operation not supported, then
either the card does not support MII opteration,
or the driver has been configured to single
speed/duplex at initialiation. Check the
/etc/modules.conf file to see which parameters
have been used.

I have network admins who insist on configuring
Cisco routers at 100/Full. However, the MII
announcement in this case is 100/Half, so we
initialize the cards to 100/Full.

If the card reinitializes, mii-tool starts
telling us what the settings are and we
have a duplex mismatch.