H3C Technologies H3C SecPath F1000-E - Manual (Page 159)

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table based on the actual networking situation and the performance requirements. If the configured
maximum number of IPv6 multicast forwarding table entries is smaller than the current value, the entries
in excess will not be immediately deleted; instead they will be deleted by the IPv6 multicast routing
protocol running on the router. The router will no longer install new IPv6 multicast forwarding entries until
the number of existing IPv6 multicast forwarding entries comes down below the configured value.
When forwarding IPv6 multicast traffic, the router replicates a copy of the IPv6 multicast traffic for each
downstream node and forwards the traffic, and thus each of these downstream nodes forms a branch of
the IPv6 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 IPv6 multicast forwarding
table to lessen burden on the router for replicating IPv6 multicast traffic. If the configured maximum
number of downstream nodes for a single IPv6 multicast forwarding entry is smaller than the current
number, the downstream nodes in excess will not be deleted immediately; instead they must be deleted
by the IPv6 multicast routing protocol. The router will no longer install new IPv6 multicast forwarding
entries for newly added downstream nodes until the number of existing downstream nodes comes down
below the configured value.
Follow these steps to configure the IPv6 multicast forwarding table size:
To do... Use the command... Remarks
Enter system view system-view —
Configure the maximum number of
entries in the IPv6 multicast
forwarding table
multicast ipv6
forwarding-table route-limit
limit
Optional
The default is the maximum number
allowed by the system.
Configure the maximum number of
downstream nodes for a single
IPv6 multicast forwarding entry
multicast ipv6
forwarding-table
downstream-limit limit Optional
The default is the maximum number
allowed by the system.
Displaying and Maintaining IPv6 Multicast Routing
and Forwarding
To do... Use the command... Remarks
Display the IPv6 multicast boundary
information
display multicast ipv6 boundary { group
[ ipv6-group-address [ prefix-length ] ] | scope
[ scope-id ] } [ interface interface-type
interface-number ]
Available in
any view
Display the information of the IPv6
multicast forwarding table
display multicast ipv6 forwarding-table
[ ipv6-source-address [ prefix-length ] |
ipv6-group-address [ prefix-length ] |
incoming-interface { interface-type
interface-number | register } |
outgoing-interface { { exclude | include |
match } { interface-type interface-number |
register } } | statistics ] * [ port-info ]
Available in
any view