3Com 10014299 manual Configure Bridge’s Routing Function, By default, disable bridging functions

Configure Bridge’s Routing Function 297

will be routed through IP. Certainly, if IP cannot find a route, it will discard the packet instead of forwarding it to the bridge for processing. If the packet uses a protocol other than IP (for example, if it is the packet from the network like AppleTalk or DecNet), it will be bridged.

For the 3Com Router series, if the bridging function is not enabled, all the IP packets will be routed through IP. If it is enabled, the packets in the bridge-set will be bridge forwarded.

Link-setWhen there are multiple parallel links between two bridge devices, and the corresponding link ports are all added to the bridge set, the spanning tree protocol can be used to avoid bridge loop, and can ensure that only one link is available to transmit data. Other corresponding link ports are all in congestion state. This can guarantee normal bridging between two bridge devices on the cost of wasting link bandwidth. The link set can guarantee the bridging function and save the link bandwidth. The solution is, adding multiple parallel links to a link set. Each corresponding link port can still independently take part in the spanning tree calculation, which guarantees the bridging function. During data forwarding, each link in the link set can share loads, thus utilizing all link bandwidths.

Configure Bridge’s Routing Function

Bridge configuration includes:

■Enable/Disable bridging functions

■Configure bridge-set

■Add ports to a bridge-set

■Configure bridging address table

■Configure parameters related to STP

■Create ACLs of bridge

■Apply ACLs on Ports

■Configure routing function

■Configure link-set

■Configure bridging over Frame Relay

■Configure bridging over BDR

■Configure bridging over LAPB

■Configure bridging over PPP

■Configure bridging over HDLC

■Configure bridging over VLAN

1Enable/Disable Bridging Functions

Perform the following configuration in system view.

Table 320 Enable/Disable bridging functions

Operation	Command
Enable bridging functions	bridge enable
Disable bridging functions	undo bridge enable

By default, disable bridging functions.