Vivotek AW-GEV-104A Series, User Manual And Warranty Statement

Page: 310 / 329

User Manual rev. 1.1. Aug. 2015
310
VLAN on the Topology View
A
Virtual LAN
(
VLAN
) is a broadcast domain that is partitioned and isolated in a network at the data
link layer (OSI layer 2). LAN is an abbreviation of Local Area Network. Broadcast packets can be
limited to within a VLAN/broardcast domain to avoid broadcast storm.
The surveillance switch supports the following for VLAN configuration:
1. IEE802.1Q Tagged VLAN , especially when a VLAN spans across multiple switches.
2. Port-based VLAN . For example, VLAN1=ports 2, 3, 4, 5; VLAN2=8, 9, 10, 11.
3. MAC-based VLAN . For example, VLAN1=MAC2, MAC3, MAC4, MAC5;
VLAN2=MAC8, MAC9, MAC10, MAC11.
4. Protocol-based VLAN . For example, IP, IPX, AppleTalk, NetBIOS, ARP, RARP,
PPPoE.
5. IP Subnet-based VLAN . For example, VLAN1=140.114.76.xx; VLAN2=140.114.77xx.
Grouping devices (IP cameras) with a common set of requirements regardless of their physical location
by VLAN can greatly simplify network design. A VLAN has the same attributes as a physical local area
network (LAN), but it allows end stations to be grouped together more easily even if they are not on the
same network switch. To physically replicate the functions of a VLAN would require a separate, parallel
collection of network cables and equipment separate from the primary network. However, unlike
physically separate networks, VLANs share bandwidth, so VLAN trunks may require aggregated links
and /or quality of service prioritization.
VLAN separates surveillance video traffic on existing data network, and reduces broadcast traffic on
the network. In addition to this, only authorized users and those who are physically connected to the
network can access devices within a VLAN. Below is a sample drawing of 3 VLANs.