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Command Detail
Bridging Commands
Although routing is preferred over bridging for transmitting data across wide area connections,
occasionally bridging is required. For example, when the data packets to be transmitted are neither IP nor
IPX (such as NetBEUI, SNA or AppleTalk), or when the other end of the WAN connection only supports
bridging.
Bridging uses an intelligent learning algorithm to build up a MAC-address-to-interface mapping, which it
then uses to make forwarding or filtering decisions for each packet it receives, whether the packet is from
the LAN side or from one of the WAN connections.
disable bridging <Interface Name>
Description:
This command disables bridging over the specified interface. If the interface already has
IP/IPX routing enabled, then routing will take precedence. For example, if both bridging and IP routing
are enabled over interface profile1, IP data will be routed, and all non-IP data will be bridged.
Example:
Router> disable bridging profile1
disable learning
Description:
This command enables or disables address learning for all bridging ports. The default mode
is
enabled
.
When learning is enabled, MAC addresses will be learned and maintained in the address table. However,
an entry will be “aged out” (removed) if the same address is not re-learned within a fixed time period,
When learning is disabled, all addresses learned so far will no longer be aged out.
enable bridging <Interface Name>
Description:
This command enables bridging over the specified interface.
enable learning
Description:
This command enables or disables address learning for all bridging ports.
show bridging
Description:
This command displays the bridging configuration over all interfaces.
Example:
IfName
IP
Other
------------------------------------------------------------
ppp2
disabled
enabled
isp1 enabled
disabled
lan
enabled
enabled
