Max Speed: configuration in smnpd.conf for display in mrtg

Hi,

Wonder if anyone would know the answer for this.

I try to figure out what is the entry needed in the snmpd.conf for the
specific display that would show in mrtg when the scan is done.

In short the display as

Max Speed: 1000.0 Mbits/s

to be display as for example

Max Speed: 150.0 Mbits/s

I have all other variable set properly for what's needed, but can't
figure this one out.

IN Cisco router you can just do

bandwidth 150000

for example to do this

In smtpd.conf I can do

system location "Your city location"

But I haven't been able to figure what's the entry for the display of
the bandwidth itself oppose to the Interface speed.

I thought this would do:

system ifSpeed "1500000"

but it doesn't and I really can't figure this one out.

The man page does provide plenty but come short for this one.

I process all the stats from an OpenBSD server and the router I query
are mostly Cisco but many are also OpenBSD too.

Any clue stick?

Many thanks

Daniel