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Chapter 1 Overview
P332G-ML User’s Guide 5
Port Classification
With the P332G-ML, you can classify any port as regular or valuable. Setting a port
to valuable means that a link fault trap can be sent even when the port is disabled.
This feature is particularly useful for the link/intermodule redundancy application,
where you need to be informed about a link failure on the dormant port.
Network TIME Acquiring Protocols
The P332G-ML supports the SNTP Protocol over UDP port 123. You can choose
between SNTP or TIME protocol over UDP port 37.
Link Aggregation Group (LAG)
LAG provides increased bandwidth and redundancy for critical high-bandwidth
applications such as inter-stack links and connections to servers. With the P332G-
ML you can aggregate the bandwidth of groups of up to four 1000Base-X ports in a
LAG, or pairs of adjacent 1000Base-X ports within a group, for a maximum of 6
LAGs per switch.
IP Multicast Filtering
IP Multicast allows you to send a single copy of an IP packet to multiple
destinations, and can be used for various applications including video streaming
and video conferencing.
On LANs, IP Multicast packets are transmitted in MAC Multicast frames.
Traditional LAN switches flood these Multicast packets to all stations in the VLAN.
Multicast filtering functions may be added to the Layer 2 switches to avoid sending
Multicast packets where they are not required. Layer 2 switches capable of
Multicast filtering send the Multicast packets only to ports that connect members of
that Multicast group. In order for this feature to operate correctly, you need in your
network a router issuing IGMP queries.
Note: IP Multicast filtering will function only based on the port's VLAN ID and not
based on any VLAN bound to the port.