Raspberry Pi as bridge

[Jörn Clausen <joernc%googlemail.com@localhost>]

Hi!

I am trying to use a Raspberry Pi running

NetBSD armv7 8.99.30 NetBSD 8.99.30 (RPI2)

as a bridge to extend my WiFi net to some devices. I have two NICs,
usmsc0 (internal RJ45) and urtwn0 (WiFi USB). urtwn0 is up and running
and works as desired. I have followed the bridge instructions in the
NetBSD guides, i.e.

$ cat /etc/ifconfig.bridge0
create
!brconfig $int add urtwn0 add usmsc0 up

tcpdump on either interface shows that broadcast packages are passed
between interfaces, but nothing else. A DHCP request coming in via
usmsc0 from a device is visible on urtwn0 but is not passed on to my
DHCP server.

I have

net.inet.ip.forwarding = 1

and because it sounded helpful also

net.inet.ip.subnetsarelocal = 0

but no change.

Any ideas? Is the Raspi kernel missing something that makes it
unusable as a bridge?

Joern

-- 
Joern Clausen
http://www.oe-files.de/photography/