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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-set When 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
1 Enable/Disable Bridging Functions
Perform the following configuration in system view.
Table 320 Enable/Disable bridging functions
By default, disable bridging functions.
Operation Command
Enable bridging functions bridge enable
Disable bridging functions undo bridge enable