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Configuring the Switch
3-204
3
IP Routing
Overview
This switch supports IP routing and routing path management via static routing
definitions (page 3-222) and dynamic routing such as RIP (page 3-224) or OSPF
(page 3-234). When IP routing is enabled (page 3-225), this switch acts as a
wire-speed router, passing traffic between VLANs using different IP interfaces, and
routing traffic to external IP networks. However, when the switch is first booted, no
default routing is defined. As with all traditional routers, the routing functions must
first be configured to work.
Initial Configuration
In the default configuration, all ports belong to the same VLAN and the switch
provides only Layer 2 functionality. Therefore, you should first create VLANs for
each unique user group or application traffic (page 3-140), assign all ports that
belong to the same group to these VLANs (page 3-141), and then assign an IP
interface to each VLAN (page 3-208). By separating the network into different
VLANs, it can be partitioned into subnetworks that are disconnected at Layer 2.
Network traffic within the same subnet is still switched using Layer 2 switching. And
the VLANs can now be interconnected (only as required) with Layer 3 switching.
Each VLAN represents a virtual interface to Layer 3. You just need to provide the
network address for each virtual interface, and the traffic between different
subnetworks will be routed by Layer 3 switching.
VLAN 1
VLAN 2
Inter-subnet traffic (Layer 3 switching)
Routing
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Intra-subnet traffic (Layer 2 switching)