[mrtg] Re: NIC card speed problem

[Lightfoot.Michael]

> 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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