Configuring A Multicast Forwarding Range; Configuring The Multicast Forwarding Table Size - H3C S7500E Series Operation Manual

Operation Manual – Multicast
H3C S7500E Series Ethernet Switches
Enter system view
Configuring multicast load
splitting

7.3.6 Configuring a Multicast Forwarding Range

Multicast packets do not travel without a boundary in a network. The multicast data
corresponding to each multicast group must be transmitted within a definite scope.
You can configure a forwarding boundary specific to a particular multicast group on all
interfaces that support multicast forwarding. A multicast forwarding boundary sets the
boundary condition for the multicast groups in the specified range. If the destination
address of a multicast packet matches the set boundary condition, the packet will not
be forwarded. Once a multicast boundary is configured on an interface, this interface
can no longer forward multicast packets (including packets sent from the local device)
or receive multicast packets.
Follow these steps to configure a multicast forwarding range:
Enter system view
Enter interface view
Configure a multicast
forwarding boundary

7.3.7 Configuring the Multicast Forwarding Table Size

Too many multicast routing entries can exhaust the router's memory and thus result in
lower router performance. Therefore, the number of multicast routing entries should be
limited. You can set a limit on the number of entries in the multicast routing table based
on the actual networking situation and the performance requirements. In any case, the
number of route entries must not exceed the maximum number allowed by the system.
This maximum value varies with different device models.
If the configured maximum number of downstream nodes (namely, the maximum
number of outgoing interfaces) for a routing entry in the multicast forwarding table is
smaller than the current number, the downstream nodes in excess of the configured
limit will not be deleted immediately; instead they must be deleted by the multicast
To do...
system-view
multicast load-splitting
{ source |
source-group }
To do...
system-view
interface interface-type
interface-number
multicast boundary
group-address { mask |
mask-length }
Chapter 7 Multicast Routing and Forwarding
Use the command...
Use the command...
7-9
Configuration
Remarks
—
Required
Disabled by default
Remarks
—
—
Required
No forwarding boundary
by default