Switch User Manual

N ETWORK P LANNING
2-6
Using Layer 3 Routing
VLANs can significantly enhance network performance and security.
However, if you use conventional routers to interconnect VLANs, you can
lose most of your performance advantage. The TigerStack 1000 switches
are routing switches that provide wire-speed routing, which allows you to
eliminate your conventional IP routers, except for a router to handle
non-IP protocols and a gateway router linked to the WAN. Just assign an
IP address to any VLANs that need to communicate. The switch will
continue to segregate Layer 2 traffic based on VLANs, but will now
provide inter-VLAN connections for IP applications. The switch will
perform IP routing for specified VLAN groups, a directly connected
subnetwork, a remote IP subnetwork or host address, or an IP multicast
address.
Figure 2-5 IP Routing for Unicast Traffic
IP Network 1
R&D
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VLAN 2
Testing
IP Network 2
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TigerStack 1000
8748ML3