3Com Switch 7750 Configuration Guide

44
COMMON MULTICAST
C
ONFIGURATION
Overview Common multicast configuration tasks are the common contents of multicast
group management protocol and multicast routing protocol. You must enable the
common multicast configuration on the switch before enabling the two protocols.
Common multicast configuration includes:
■ Configuring limit on the number of route entries: when the multicast routing
protocol is configured on the switch, plenty of multicast route entries will be
sent to upstream Layer 3 switches or routers. In order to prevent plenty of
multicast route entries from consuming all the memory of the Layer 3 switches
or routers, you can configure limit on the number of route entries to prevent
too many route entries from being sent to Layer 3 switches or routers.
■ Configuring suppression on the multicast source port: In the network, some
users may set up multicast servers privately, which results in the shortage of
multicast network resources and affects the multicast bandwidth and the
transmission of valid information in the network. You can configure the
suppression on the multicast source port feature to filter multicast packets on
the unauthorized multicast source port, so as to prevent the users connected to
the port from setting up multicast servers privately.
■ Clearing the related multicast entries: through clearing the related multicast
entries, you can clear the multicast route entries saved in the memory of the
Layer 3 switches or routers to release the system memory
Common Multicast
Configuration Tasks
Table 352 Common multicast configuration tasks
Operation Description Related section
Enable multicast routing and
configure limit on the number of
multicast route entries
Required “Enabling Multicast Routing and
Configuring Limit on the Number of
Multicast Route Entries” on page
442
Configure suppression on the
multicast source port
Optional “Configuring Suppression on the
Multicast Source Port” on page 442
Configure suppression on multicast
wrongif packets
Optional “Configuring Suppression on
Multicast Wrongif Packets” on page
442
Configure static router ports Optional “Configuring Static Router Ports” on
page 443
Clear the related multicast entries Optional “Clearing the Related Multicast
Entries” on page 444