Configuring Basic Igmp Functions; Establishing The Configuration Task - Huawei Quidway S7700 Configuration Manual - Multicast

Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast
IGMP Query Controller
For IGMPv1, you can set the interval for sending General Query messages and robustness
variable.
For IGMPv2, you can set the interval for sending General Query messages, robustness variable,
maximum response duration of IGMP Query messages, and IGMP prompt leave.
For IGMPv3, you can set the interval for sending General Query messages, robustness variable,
and maximum response time of IGMP Query messages.
SSM-Mapping
An S7700 can serve hosts of IGMPv1 and IGMPv2 after you configure SSM-Mapping on the
S7700.
IGMP Limit
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4.3 Configuring Basic IGMP Functions

This section describes how to configure and apply IGMP.

4.3.1 Establishing the Configuration Task

Applicable Environment
IGMP is applied to the network segment in which a host is connected to an S7700. IGMP needs
to run on both the S7700 and the host. The following contents describe how to configure IGMP
on an S7700.
You must enable IP multicast routing before configuring IGMP. IP multicast routing is the
prerequisite of configuring all multicast functions. If IP multicast routing is disabled, the
multicast-related configurations cannot take effect.
IGMP needs to be enabled on the VLANIF interface that is connected to the host. The matching
IGMP version needs to be configured on the S7700 and host because the IGMP messages vary
according to version. The later version on the S7700 side is compatible with the earlier version
on the host side. Other configurations can be performed only after IGMP is enabled.
Issue 01 (2011-07-15)
NOTE
IGMPv1 does not support querier election. Therefore, you need to enable PIM for querier election.
The function of IGMP Limit is applicable to IPv4 PIM-SM and IPv4 PIM-DM networks.
To limit the number of users accessing IP core networks, you can configure the IGMP limit
function.
– Configure the maximum number of global IGMP group memberships on a S7700.
– Configure the maximum number of IGMP group memberships on an interface.
NOTE
If the IGMP limit function is required to be configured globally, and for an interface on the same
S7700, it is recommended that the limits on the number of global IGMP group memberships, and the
number of IGMP group memberships on the interface should be in descending order.
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