User's Manual

Tsunami MP.11 2454-R, 5054-R, and 5054-R-LR Installation and Management
Chapter 3. Management Overview 28
• Roaming will automatically select a channel on the SU corresponding to the BSU channel. Roaming is
the procedure in which an SU terminates the session with the current BSU and starts the registration
procedure with another BSU when it finds the quality of the other BSU to be better.
VIRTUAL LOCAL AREA NETWORKS (VLANs)
Virtual Local Area Networks (VLANs) are logical groupings of network hosts. Defined by software settings, other
VLAN members or resources appear (to connected hosts) to be on the same physical segment, no matter where
they are attached on the logical LAN or WAN segment. They simplify allowing traffic to flow between hosts and
their frequently-used or restricted resources according to the VLAN configuration.
Tsunami MP.11 5054-R and 2454-R units are fully VLAN-ready; however, by default, VLAN support is disabled.
Before enabling VLAN support (by assigning a VLAN Management ID), certain network settings should be
configured and network resources such as VLAN-aware switches should be available, dependent upon the type
of configuration.
VLANs are used to conveniently, efficiently, and easily manage your network in the following ways:
• Manage VLAN configuration from a single window
• Define groups
• Reduce broadcast and multicast traffic to unnecessary destinations
º Improve network performance and reduce latency
• Increase security
º Secure network restricts members to resources on their own VLAN
VLAN tagged data is collected and distributed through a unit’s Ethernet interface . The units can communicate
across a VLAN-capable switch that analyzes VLAN-tagged packet headers and directs traffic to the appropriate
ports when the units are working in their Transparent mode.
VLAN features can be managed via:
• The BSU’s Web interface (see “Chapter 5. Using the Web Interface”
on page 40)
• The Command Line Interface (see “Command Line Interface” in the Reference Manual)
• SNMP (see the MIBs provided on the product CD)
For more information about VLAN configuration, see “Configure VLAN Parameters”
on page 88.
QUALITY OF SERVICE (QOS)
The Quality of Service (QoS) feature is based on the 802.16 standard and defines the classes, service flows, and
packet identification rules for specific types of traffic. QoS main priority is to guarantee a reliable and adequate
transmission quality for all types of traffic under conditions of high congestion and bandwidth over-subscription.