help with options BRIDGE in freebsd 7.0

[cp]

I'd really appreciate if someone can shed some light on this for me. I'm
attempting to build a layer2 sniffer using dummynet and ipfw but I'm
having some problems building the new kernel with "options BRIDGE". It
errors out with the message below. Any suggestions? 

-cp

lois# /usr/sbin/config LOIS 
LOIS: unknown option "BRIDGE"
freebsd version  = 7.0

lois# more LOIS | grep IP
options         IPSEC
options         IPSEC_FILTERTUNNEL
options         IPSEC_DEBUG
options         IPFIREWALL
options         IPFIREWALL_VERBOSE
options         IPFIREWALL_VERBOSE_LIMIT=100
options         IPFIREWALL_DEFAULT_TO_ACCEPT
options         IPFIREWALL_FORWARD
options         IPDIVERT
options         IPFILTER
options         IPFILTER_LOG
lois# more LOIS | grep BR
options         NETGRAPH_BRIDGE
options         BRIDGE

lois# more LOIS | grep DUM
options         DUMMYNET
lois#