D-Link DXS-3600 Series Cli Reference Manual page 643

DXS-3600 Series Layer 3 Managed 10Gigabit Ethernet Switch CLI Reference Guide
The robustness variable provides fine tuning to allow for expected packet loss on an interface. The value
of the robustness variable is used in calculating the following IGMP message intervals:
•
Group member interval – The amount of time that must pass before a multicast router decides
there are no more members of a group on a network. This interval is calculated as follows:
(robustness variable x query interval) + (1 x query response interval).
•
Other querier present interval – The amount of time that must pass before a multicast router
decides that there is no longer another multicast router that is the querier. This interval is
calculated as follows: (robustness variable x query interval) + (0.5 x query response interval).
•
Last member query count – The number of group-specific queries sent before the router
assumes there are no local members of a group. The default number is the value of the
robustness variable.
Example
This example shows how to configure the robustness variable to be 3 on interface VLAN 1000.
Switch# configure terminal
Switch(config)# interface vlan1000
Switch(config-if)# ip igmp robustness-variable 3
Switch(config-if)#
49-8 ip igmp ssm-map enable
This command is used to enable the SSM mapping for IGMPv1 or IGMPv2 hosts. Use the no form of the
command to disable the mapping.
ip igmp ssm-map enable
no ip igmp ssm-map enable
Parameters
None.
Default
By default, this option is disabled.
Command Mode
Global Configuration Mode.
Command Default Level
Level: 12.
Usage Guideline
Use this command to enable SSM mapping for groups in the configured SSM range. SSM mapping is
only applied to received IGMPv1 or IGMPv2 membership report packets.
Example
This example shows how to enable the SSM mapping for IGMPv1 or IGMPv2 hosts.
Switch# configure terminal
Switch(config)# ip igmp ssm-map enable
Switch(config)#
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