Checking The Configuration; Configuring Control Parameters Of The Ipv6 Multicast Forwarding Table; Establishing The Configuration Task - Huawei Quidway S7700 Configuration Manual - Multicast

Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast
The IPv6 multicast forwarding boundary is configured.
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14.4.3 Checking the Configuration

After the multicast forwarding scope is configured, you can check information about the IPv6
multicast routing table, IPv6 multicast boundary of an interface, and TTL threshold of the IPv6
multicast packets forwarded on an interface to ensure normal running of the multicast network.
Procedure
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14.5 Configuring Control Parameters of the IPv6 Multicast
Forwarding Table
During network planning, you can restrict the capacity of the forwarding table on a multicast
device, such as the maximum number of entries in the multicast forwarding table and the
maximum number of downstream interfaces of multicast forwarding entries. In this manner,
traffic load on the multicast device is released and thus the fault risk resulted from excessive
entries can be avoided.

14.5.1 Establishing the Configuration Task

Before configuring control parameters for the multicast forwarding table, familiarize yourself
with the applicable environment, pre-configuration tasks, and required data. This can help you
complete the configuration task quickly and accurately.
Applicable Environment
When planning a specific network according to network services, the ISP needs to perform the
following configurations:
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Issue 01 (2011-07-15)
Run the display multicast ipv6 routing-table [ ipv6-source-address [ ipv6-source-mask-
length ] | ipv6-group-address [ ipv6-group-mask-length ] | incoming-interface { interface-
type interface-number | register } | outgoing-interface { { exclude | include | match }
{ interface-type interface-number | register | none } } ]
[ number ] ] command to check the IPv6 multicast routing table.
Run the display multicast ipv6 boundary [ ipv6-group-address [ ipv6-group-mask-
length ] ] [ interface interface-type interface-number ] command to check the IPv6
multicast boundary configured on the interface.
Limiting the number of entries in the IPv6 multicast forwarding table
A switch maintains a forwarding entry for each received multicast packet. Too many
multicast forwarding entries, however, use up the memory of the switch. You can define
the maximum number of entries in the multicast forwarding table of a switch. Limiting the
number of entries according to the actual networking and service performance can prevent
faults caused by too many entries.
Limiting the number of downstream interfaces of a single forwarding entry
A switch replicates a multicast packet for each downstream interface and sends them out.
Each downstream interface forms a branch of a multicast distribution tree (MDT). The
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14 IPv6 Multicast Routing Management
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[ outgoing-interface-number
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