Korenix JetNet 4500 Series, User Manual

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Korenix JetNet Series Industrial Managed Ethernet Rail Switch User’s Manual 3-27
The IEEE 802.1D suggests you to use CoS value 0 and 3 to Low, 1 and 2 to Lowest, 4 and 5 to
Middle, 6 and 7 to High.
ToS-Queue Mapping
TOS is also known as DSCP. This is the field in the IP TOS packet. If the L3 switch or Router use
this field as the QoS service. Then the L2 switches attached to the network should have the
same policy as the L3 switch or Router. This table allows you to configure the queue level for
each DSCP value.
IGMP Snooping
The IGMP (Internet Group Management Protocol) is an Internet Protocol that provides a way for
an internet device to report its multicast group membership to adjacent routers. Multicasting
allows one computer on the internet to send data to a multitude of other computers that have