PfSense 2.0.1 on Soekris Net5501: poor performances

[akelge]

Hi to all!
I'm have been using pfSense on Soekris hardware for almost 5 years.
I've used it on a Net4801 and now on a Net5501-70.
The schema is:

vlan0 on vr1 -> LAN
vlan1 on vr1 -> OOB (internal management network)
vr0 -> WAN
vr2 -> OLAN (another LAN)

Everything was working fine and bandwidth was fully usable (10Mbps fiber)

Yesterday we upgraded our Internet connection from 10Mbps to 100Mbps and I decided to upgrade pfSense from 1.2.2 to 2.0.1.

After upgrading and reconfiguring performances were really poor:
on LAN (vlan interface) I could reach 3/4 Mbps at most;
on OLAN (physical interface) I could reach at most 20Mbps.
CPU was low (10% load) and mem was almost free (as it should be), no hardware problems, no interface errors.

I suspected something involving VLANs and the Switch, made all my checks, then put up and old PC with pfSense 2.0.1, same configuration and everything went good (80/85 Mbps).

Then I downgraded the Net5001 to 1.2.2 and performances went really UP (80/85Mbps) either with polling enabled or not.
So, I tried with 1.2.3 and performances where the same of 1.2.2.

What is wrong with 2.0.1 (I've no time to test 2.0.0, unluckily) and Soekris Net5501? Is there some tuning I can try?

I would really like to use 2.0.1, but, right now, it is not possible.+
TIA
A.

[eri--]

check interface link negotiation or force it to the configured speed!

[akelge]

@ermal:

check interface link negotiation or force it to the configured speed!

You're right! I've found it by myself, autonegotiation wins in this case, forcing speed and duplex can cause troubles.

Now I'm on 2.0.1, at last!

Thanks
A.