EDR-G9010 Series User Manual
82
Click the icon to configure the Ingress and Egress rate for the corresponding port.
Ingress/Egress
Setting
Description
Factory Default
Not Limited, 3%, 5%, 10%,
15%, 25%, 35%, 50%,
65%, 85%
Select the ingress/egress rate limit (% of max.
throughput) for all packets.
Not Limited
When finished, click
APPLY
to save your changes.
Multicast
Multicast filtering improves the performance of networks that carry multicast traffic. This section covers the
IGMP Snooping and Static Multicast Table pages, and explains how multicast filtering can be implemented
on your Moxa industrial secure router.
The Concept of Multicast Filtering
What is an IP Multicast?
A
multicast
is a packet sent by one host to multiple hosts. Only those hosts that belong to a specific
multicast group will receive the multicast. If the network is set up correctly, a multicast can only be sent to
an end-station or a subset of end-stations on a LAN or VLAN that belong to the multicast group. Multicast
group members can be distributed across multiple subnets, so that multicast transmissions can occur within
a campus LAN or over a WAN. In addition, networks that support IP multicast send only
one
copy of the
desired information across the network until the delivery path that reaches group members diverges. To
make more efficient use of network bandwidth, it is only at these points that multicast packets are
duplicated and forwarded. A multicast packet has a multicast group address in the destination address field
of the packet’s IP header.
Benefits of Multicast
The benefits of using IP multicast are:
•
It uses the most efficient, sensible method to deliver the same information to many receivers with only
one transmission.
•
It reduces the load on the source (for example, a server) since it will not need to produce several copies
of the same data.
•
It makes efficient use of network bandwidth and scales well as the number of multicast group members
increases.
•
Works with other IP protocols and services, such as Quality of Service (QoS).
