H3C Technologies H3C SecPath F1000-E - Manual (Page 592)

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Step Command Remarks
3. Configure multicast load splitting. multicast load-splitting { source |
source-group }
Optional.
Disabled by default.
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. After you configure an interface as a multicast
boundary, the interface can no longer forward multicast packets (including packets sent from the local
device) or receive multicast packets.
To configure a multicast forwarding range:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Configure a multicast forwarding
boundary.
multicast boundary group-address
{ mask | mask-length } No forwarding boundary
by default
Configuring the multicast forwarding table size
The router maintains the corresponding forwarding entry for each multicast packet that it receives.
Excessive multicast routing entries, however, can exhaust the router’s memory and cause lower router
performance. You can set a limit on the number of entries in the multicast forwarding table based on the
networking situation and the performance requirements. If the configured maximum number of multicast
forwarding table entries is smaller than the current value, the forwarding entries in excess will not be
deleted immediately. Instead, the multicast routing protocols that are running on the router will delete
them. The router will no longer add new multicast forwarding entries until the number of existing multicast
forwarding entries comes down under the configured value.
When forwarding multicast traffic, the router replicates a copy of the multicast traffic for each
downstream node and forwards the traffic. Thus, each of these downstream nodes forms a branch of the
multicast distribution tree. You can configure the maximum number of downstream nodes (namely, the
maximum number of outgoing interfaces) for a single entry in the multicast forwarding table to lessen the
burden on the router for replicating multicast traffic. If the configured maximum number of downstream
nodes for a single multicast forwarding entry is smaller than the current number, the downstream nodes
in excess will not be deleted immediately. Instead, the multicast routing protocols that are running on the
router will delete them. The router will no longer add new multicast forwarding entries for newly added
downstream nodes until the number of existing downstream nodes comes down under the configured
value.
To configure the multicast forwarding table size for the public network:
Step Command Remarks
1. Enter system view. system-view N/A