SMC Networks SMC Tiger 10/100 SMC6128PL2 - Manual (Page 39)

Description of Software Features
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Quality of Service – Differentiated Services (DiffServ) provides policy-based
management mechanisms used for prioritizing network resources to meet the
requirements of specific traffic types on a per-hop basis. Each packet is classified
upon entry into the network based on access lists, IP Precedence or DSCP values,
or VLAN lists. Using access lists allows you select traffic based on Layer 2, Layer 3,
or Layer 4 information contained in each packet. Based on network policies, different
kinds of traffic can be marked for different kinds of forwarding.
Multicast Filtering – Specific multicast traffic can be assigned to its own VLAN to
ensure that it does not interfere with normal network traffic and to guarantee
real-time delivery by setting the required priority level for the designated VLAN. The
switch uses IGMP Snooping and Query to manage multicast group registration. It
also supports Multicast VLAN Registration (MVR) which allows common multicast
traffic, such as television channels, to be transmitted across a single network-wide
multicast VLAN shared by hosts residing in other standard or private VLAN groups,
while preserving security and data isolation for normal traffic.