3Com Switch 7750 Configuration Guide Guide

400 CHAPTER 41: COMMON MULTICAST CONFIGURATION
Enable Multicast
Routing and Configure
Limit on the Number of
Multicast Route Entries
c
CAUTION: The other multicast configurations do not take effect until multicast
routing is enabled.
Configure Suppression
on the Multicast Source
Port
Configure suppression on the multicast source port in system view
Configure suppression on the multicast source port in Ethernet port view
c
CAUTION: The following I/O Modules do not support the suppression on the
multicast source port feature: 3C16860, 3C16861, 3C16859, and 3C16858.
Configuring Suppression
on Multicast Wrongif
Packets
Introduction
When the switch receives a multicast packet, the switch will search the multicast
forwarding entry according to the source address and destination address of the
packet. If the matching forwarding entry is found and the packet is received on
the right ingress of the forwarding entry, the packet will be forwarded according
to the forwarding entry. If the packet is not received on the right ingress of the
Tabl e 319 Enable multicast routing and configure limit on the number of multicast route
entries
Operation Command Description
Enter system view system-view -
Enable multicast routing multicast routing-enable
Required
Multicast routing must be
enabled before the multicast
group management protocol
and the multicast routing
protocol are configured.
Configure limit on the
number of multicast route
entries
multicast route-limit limit
Optional
By default, the limit on the
number of multicast route
entries is 1,024.
Tabl e 320 Configure suppression on the multicast source port
Operation Command Description
Enter system view system-view -
Configure suppression on the
multicast source port
multicast-source-deny
enable [ interface
interface-list ]
Required
The suppression on the
multicast source port feature
is disabled by default.
Tabl e 321 Configure suppression on the multicast source port
Operation Command Description
Enter system view system-view -
Enter Ethernet port view
interface interface-type
interface-number
-
Configure suppression on the
multicast source port
multicast-source-deny
enable
Optional
The suppression on the
multicast source port feature
is disabled by default.