High Performance Switching Example; Ieee 802.1Q Vlan Application Example - ZyXEL Communications XS-3900-48F User Manual

Chapter 1 Getting to Know Your Switch

1.4 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 optional 10 Gigabit uplink modules 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 2 High Performance Switching

1.5 IEEE 802.1Q VLAN Application Example

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 group(s) unless such traffic first goes
through a router.
For more information on VLANs, refer to
1.5.0.1 Tag-based VLAN Example
Ports in the same VLAN group share the same frame broadcast domain, thus increasing network
performance by reducing broadcast traffic. VLAN groups can be modified at any time by adding,
moving or changing ports without any re-cabling.
22
10 Gbps
Branch
HQ
Chapter 7 on page 81.
Trunk
XS3900-48F User's Guide