24-Port Layer 3 Switch Management Guide

I NTRODUCTION
1-8
Multicast Filtering – Specific multicast traffic can be assigned to its own
VLAN to ensure that it does not interfere with normal network traffic and
to guarantee real-time delivery by setting the required priority level for the
designated VLAN. The switch uses IGMP Snooping and Query at Layer 2
and IGMP at Layer 3 to manage multicast group registration.
Multicast Routing – Routing for multicast packets is supported by the
Distance Vector Multicast Routing Protocol (DVMRP) and
Protocol-Independent Multicasting - Dense Mode (PIM-DM). These
protocols work in conjunction with IGMP to filter and route multicast
traffic. DVMRP is a more comprehensive implementation that maintains
its own routing table, but is gradually being replacing by most network
managers with PIM, Dense Mode and Sparse Mode. PIM is a very simple
protocol that uses the routing table of the unicast routing protocol enabled
on an interface. Dense Mode is designed for areas where the probability of
multicast clients is relatively high, and the overhead of frequent flooding is
justified. While Sparse mode is designed for network areas, such as the
Wide Area Network, where the probability of multicast clients is low. This
switch currently supports DVMRP and PIM-DM.
System Defaults
The switch’s system defaults are provided in the configuration file
“Factory_Default_Config.cfg.” To reset the switch defaults, this file
should be set as the startup configuration file (page 3-24).
The following table lists some of the basic system defaults.
Function Parameter Default
Console Port
Connection
Baud Rate 9600
Data bits 8
Stop bits 1
Parity none
Local Console Timeout 0 (disabled)