11 Starting from version 2.2.8, FreeBSD supports bridging on ethernet-type
12 interfaces. This is achieved using the following option
17 in the kernel config file, and is controlled by two
24 Set to 1 to enable bridging, set to 0 to disable it
26 net.link.ether.bridge_ipfw
31 filtering on bridged packets. Note that
34 to IP packets. Non-IP packets are subject to the default
40 rule if we want ARP and other non-IP packets to flow through the
46 Care must be taken not to construct loops in the bridge topology.
47 The kernel supports only a primitive form of loop detection, by disabling
48 some interfaces when a loop is detected. No support for a daemon running the
49 spanning tree algorithm is currently provided.
51 With bridging active, interfaces are in promiscuous mode,
52 thus causing some load on the system to receive and filter
53 out undesired traffic.
55 Extended functionality to enable bridging selectively on clusters
56 of interfaces is still in the works.
58 Not all interface support bridging -- at the moment it works for
76 bridging was introduced in FreeBSD 2.2.8
78 .An Luigi Rizzo Aq luigi@iet.unipi.it .