TCP/IP stats (bits/s) limited to 100M

Hi,

I have data suspicious with TCP/IP stats on Solaris and AIX.

Graphs told me that my hosts don't send/receive more than ~110 Mbits/ 

s . This raise an alert on the backup server which is installed with
a GigEth interface and need to eat many backups flow simulteanously.

So, I'm checking other GigEth equipped host.
I have some solaris hosts with GigEth. Graphs are inconsistent  

between interfaces details and TCP/IP general graphs. Take a look :

http://www.unikservice.com/frp/tcpip.png
http://www.unikservice.com/frp/i1.png
http://www.unikservice.com/frp/i2.png

So, I'm suspecting an issue with collect or graphs.  Could somebody  

tell me where I should start to debug ?

Nicolas