10giga network speed

basheerpt · 12-09-2013, 01:13 AM

Hi,
Recently added a Broadcom 5711 dual port 10G NIC to my Redhat 5.3 server. The network is connected, but the ethtool shows the below information. The 'Supported Mode' says : 1000T/Full. What does it mean? I cannot get the 10G speed? How do i make sure i am getting the full 10G network speed? here is the ethtool eth1:
=================
Supported ports: [FIBRE]
Supported link modes: 1000BaseT/Full
Supports auto-negotiation: Yes
Advertised Link modes: 10000baseT/Full
Advertised auto-negotiation: No
Speed: 10000Mb/s
Duplex: Full
Port: FIBRE
PHYAD: 16
Transceiver: internal
Autonegotiation: Off
Supports wake-on: d
Wake-on: d
Current message level: 0x00000000 (0)
Link Detected: yes
==================================

rtmistler · 12-09-2013, 06:51 AM

Quote:

Originally Posted by basheerpt

Speed: 10000Mb/s

That is 10G

100M is one hundred Megs
1,000M is one Gig
10,000M is ten Gigs

basheerpt · 12-10-2013, 12:28 AM

Thanks for your post.
My concern is, why it is showing supported link modes "Supported link modes: 1000BaseT/Full" (shown in RED in original post)?
Does it mean it may not support more that 1 Giga?

Thanks again

vishesh · 12-10-2013, 10:20 AM

Yes, Driver supporting Max 1G here.

basheerpt · 12-11-2013, 01:18 AM

Is there any tweak to utilize the full advertised speed of 10G?

suicidaleggroll · 12-11-2013, 11:28 AM

Does your entire infrastructure support 10G? Plugging a 10G network card into a 1G router/switch with 1G network cables will still limit you to 1G.

basheerpt · 12-12-2013, 08:15 AM

Yes, this card is connected to a 10G force10 switch.

rtmistler · 12-12-2013, 08:35 AM

Quote:

Originally Posted by basheerpt

Thanks for your post.
My concern is, why it is showing supported link modes "Supported link modes: 1000BaseT/Full" (shown in RED in original post)?
Does it mean it may not support more that 1 Giga?

Thanks again

I've always understood that when ethtool shows Speed, that it is the speed at which it is operating.

This link suggests to check your system log, which sounds to be a great idea.

How to check network speed.

For instance, here's a clip out of mine, pretty definitive showing exactly what speed it is operating at:

Code:

dmesg | grep -i duplex | more
[2435549.872417] e1000: eth1 NIC Link is Up 100 Mbps Full Duplex, Flow Control: RX/TX

Something else, whether it be workstation, or server; the point brought up by suicidaleggroll about the network is important. There's no real benefit if you are going 10G if the network infrastructure does not support that.

rtmistler · 12-12-2013, 08:37 AM

To add further to my last, when I run ethtool, my NIC capabilities state that it can do 1G, however my Speed is 100M.

Code:

sudo ethtool eth0
Settings for eth0:
	Supported ports: [ TP MII ]
	Supported link modes:   10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/Half 1000baseT/Full 
	Supports auto-negotiation: Yes
	Advertised link modes:  10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/Half 1000baseT/Full 
	Advertised pause frame use: No
	Advertised auto-negotiation: Yes
	Link partner advertised link modes:  10baseT/Half 10baseT/Full 
	                                     100baseT/Half 100baseT/Full 
	Link partner advertised pause frame use: No
	Link partner advertised auto-negotiation: Yes
	Speed: 100Mb/s
	Duplex: Full
	Port: MII
	PHYAD: 0
	Transceiver: internal
	Auto-negotiation: on
	Supports Wake-on: pumbg
	Wake-on: g
	Current message level: 0x00000033 (51)
	Link detected: yes

jefro · 12-12-2013, 06:14 PM

Speed: 10000Mb/s
Duplex: Full
Port: FIBRE

I'd assume it is in 10G mode.

Try to move some data to prove it. You'd need one heck of a system to feed that much data for a proper test by the way.