Dell PowerConnect 3024 User Manual page 24

Multimedia Support
There are two settings available from this page: IGMP and High Priority Optimization.
IGMP
With IGMP (Internet Group Management Protocol) Snooping, you can configure the switch to forward multicast traffic intelligently. Based on the IGMP query
and report messages, the switch forwards traffic only to the ports that request multicast traffic. This prevents the switch from broadcasting the traffic to all
ports and possibly disrupting network performance.
NOTE: IGMP requires a router that learns about the presence of multicast groups on its subnets and keeps track of group membership.
The IGMP option can be set as follows:
Enabled — The system detects IGMP queries and report packets and manages IP multicast traffic through the switch.
l
Disabled — The switch forwards traffic and ignores any IGMP requests.
l
High-Priority Optimization
NOTICE: Enabling high-priority optimization can effectively disable flow- control for normal-priority packets.
The High-Priority Optimization setting implements a priority-based head-of-line blocking prevention algorithm in the system. This algorithm ensures that in the
case of traffic congestion, normal priority packets do not hold up high priority packets.
NOTE: Enabling high priority optimization can improve overall system performance for networks with time-sensitive, prioritized traffic, for example, the
traffic associated with multimedia streaming, teleconferencing, or telephony applications.