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WGS3 Layer 3 Switch User’s Manual
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Layer 3
Network layer in the ISO 7-Layer Data Communications Protocol. This layer handles the routing
functions for data moving from one open system to another.
Link Aggregation
See Port Trunk.
Management Information Base (MIB)
An acronym for Management Information Base. It is a set of database objects that contains information
about a specific device.
Multicast Switching
A process whereby the switch filters incoming multicast frames for services no attached host has
registered for, or forwards them to all ports contained within the designated multicast VLAN group.
Open Shortest Path First (OSPF)
OSPF is a link state routing protocol that functions better over a larger network such as the Internet, as
opposed to distance vector routing protocols such as RIP. It includes features such as unlimited hop
count, authentication of routing updates, and Variable Length Subnet Masks (VLSM).
Out-of-Band Management
Management of the network from a station not attached to the network.
Port Mirroring
A method whereby data on a target port is mirrored to a monitor port for troubleshooting with a logic
analyzer or RMON probe. This allows data on the target port to be studied unobtrusively.
Port Trunk
Defines a network link aggregation and trunking method which specifies how to create a single
high-speed logical link that combines several lower-speed physical links.
Remote Monitoring (RMON)
RMON provides comprehensive network monitoring capabilities. It eliminates the polling required in
standard SNMP, and can set alarms on a variety of traffic conditions, including specific error types.