Strange hang with dummynet

[Nikola Knežević]

Hi,

I'm running FreeBSD 7.1-PRERELEASE with custom kernel on my box, and  
when I did:
kldload dummynet && kldload ipfw
the machine just "hanged" - I couldn't access it over ssh, and current  
sessions were blocked.
This happens also with GENERIC. I didn't touch anything related to  
ipfw or dummynet's configuration (that I know).
Any thoughts? How can I debug this?

Cheers,
Nikola