2: Product Overview
XPress-Pro SW 94000 User Guide 16
The purpose of IP multicast filtering is to optimize a switched network’s performance, so
multicast packets will only be forwarded to those ports containing multicast group hosts
members and routers instead of flooding to all ports in the subnet (VLAN).
Routing switches with IP multicast filtering/switching capability not only passively monitor
IGMP Query and Report messages, DVMRP Probe messages, PIM, and MOSPF Hello
messages; they also actively send IGMP Query messages to learn locations of multicast
routers and member hosts in multicast groups within each VLAN.
Note, however, IGMP neither alters nor routes any IP multicast packets. Since IGMP is
not concerned with the delivery of IP multicast packets across sub-networks, an external
IP multicast router is needed if IP multicast packets have to be routed across different
sub-networks.
Switch Management Administration console via RS-232 serial port
The Xpress-Pro SW 94000 switch provides an onboard serial port, which allows the
switch to be configured via a directly connected terminal or a Telnet session.
Web-based browser interface
The Xpress-Pro SW 94000 switch also hosts a point-and-click browser-based interface
that lets users access full switch configuration and functionality from a Netscape or
Internet Explorer browser.
External SNMP-based network management application
The Xpress-Pro SW 94000 switch can also be configured via SNMP.For more
information on switch management, refer to the “Switch Management” section.