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Chapter 12 IP Route
11.1 IP Route
In addition to the layer 3 switches can be the same as the layer 2 switches through a
MAC address in a LAN to pass data packets, but also can be the same as the router through
the IP address in multiple LAN packets. Both can achieve network routing function, but also
according to different network conditions to achieve optimal network performance.
VLANs are usually associated with IP networks. All working terminals in a specific IP
subnet belong to the same VLAN. Different VLANs must communicate through a router or a
router with a router function.
In general, routing information that directs IP forwarding can be obtained in three
different ways:
Static routing - The only path that is manually configured by the system administrator to
the destination network, which must also be manually modified by the system
administrator when the network structure changes. But the rational use of static routing
can improve the performance of the network, for important applications to save
bandwidth.
Default routing - A special route manually configured by the system administrator. You
can forward all packets that do not match the route to the specified default gateway.
