Configuring Multicast Forwarding Table Size - H3C S3610 Series Operation Manual

Operation Manual – Multicast Protocol
H3C S3610&S5510 Series Ethernet Switches
Specifying boundary interfaces, which form a closed multicast forwarding area, or
Setting the minimum time to live (TTL) required for a multicast packet to be
forwarded.
You can configure the forwarding boundary of a specific 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 multicast packets sent from the local
device) or receive multicast packets.
Follow these methods to configure a multicast forwarding range:
Enter system view
Enter interface view
Configure
forwarding boundary

8.3.7 Configuring 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 defined by the system.
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
routing protocol. In addition, newly added downstream nodes cannot be installed to the
routing entry in the forwarding table.
If the configured maximum number of routing entries in the multicast forwarding table is
smaller than the current number, the routes in excess of the configured limit will not be
deleted immediately; instead they must be deleted by the multicast routing protocol. In
addition, newly added route entries cannot be installed to the forwarding table.
Follow these steps to configure the multicast forwarding table size:
To do...
system-view
interface
interface-number
multicast
a multicast
group-address { mask |
mask-length }
Chapter 8 Multicast Policy Configuration
Use the command...
interface-type
boundary
8-7
Remarks
—
—
Required
No forwarding boundary
by default