[mrtg] Re: NIC card speed problem

[Bill Wang (RDC)]

Hi, LightFoot,

I follow your instruction to run the ndd command.
**************************************************
ecnshsr203# ndd -set /dev/hme instance 0
ecnshsr203#  ndd -get /dev/hme link_speed
1
ecnshsr203# ndd -get /dev/hme link_mode
1
**************************************************
>From the output, the server NIC card is 100M full duplex. 

Our switch is Cisco 4006. 

Does it mean the card is really running in 100M Duplex speed? 

Best regards

Bill Wang
ClearCase Administrator
Network Administrator

Ericsson Communication Software Research
and Development (Shanghai) Co., Ltd

16 Floor Aetna Building 	Telephone:	+86 21 6237 5588-21535
No. 107 Zun Yi Road		fax:	+86 21 6237 5205
Shanghai, China 200051	ECN No. :	88721535
Where there is a will, there is a way. 


-----Original Message-----
From: Lightfoot.Michael [mailto:Lightfoot.Michael at comcare.gov.au]
Sent: Thursday, October 31, 2002 11:49 AM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] Re: NIC card speed problem



 
> One Sun server have a 100M NIC card, when I run mrtg on it, 
> in the cfg file, it always report that the network port is 
> only 10M, does it mean the server only have 10M speed?
> 
Firstly, you haven't said what the NIC is or what OS is running but let
me assume that you have a Happymeal interface and are running Solaris
2.6 or later.  If you have an older Utra 1 or 2 it probably only has a
Lance interface which doesn't support 100Mb/s.

The Sun NICs have some problems with autonegotiation with some switches
(especially Cisco 65xx).  You should also bear in mind that cheap or old
hubs cannot do more than 10Mb/s HDX and older router cards may not do
more than 10Mb/s FDX.

To check you NIC settings you need to run the following commands (as
root):

root:/ # ndd -set /dev/hme instance 0	[for hme0]
root:/ # ndd -get /dev/hme link_speed
1							[1 for 100, 0
for 10]
root:/ # ndd -get /dev/hme link_mode
1							[1 for FDX, 0
for HDX]
root:/ #

If the interface is not as above it is not doing 100MB/s FDX and you
need to adjust accordingly by running the appropriate ndd commands or
get network hardware that suppports 100FDX.  I won't bore the list with
details here but if anyone wishes to know what we do to fix the problem
with our Cisco 6509 switch, please email me off-list.




Michael Lightfoot
Unix Consultant
ISG Host Systems
Comcare
+61 2 62750680
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