Chapter 1 Getting to Know Your Switch
XGS2220 Series User’s Guide
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Figure 6
Bridging Application
1.2.4 High Performance Switching Example
The Switch is ideal for connecting two geographically dispersed networks that need high bandwidth. In
the following example, a company uses the 10 Gigabit uplink ports to connect the headquarters to a
branch office network. Within the headquarters network, a company can use trunking to group several
physical ports into one logical higher-capacity link. Trunking can be used if for example, it is cheaper to
use multiple lower-speed links than to under-utilize a high-speed, but more costly, single-port link.
Figure 7
High Performance Switching
1.2.5 IEEE 802.1Q VLAN Application Examples
A VLAN (Virtual Local Area Network) allows a physical network to be partitioned into multiple logical
networks. Stations on a logical network belong to one or more groups. With VLAN, a station cannot
directly talk to or hear from stations that are not in the same groups unless such traffic first goes through
a router.
