Configuring IP Multicast Switching Modifying IPMS Parameters
OmniSwitch AOS Release 8 Network Configuration Guide December 2017 page 25-22
Enabling and Disabling the IGMP Spoofing
By default, IGMP spoofing (i.e., replacing a client's MAC and IP address with the system's MAC and IP
address, when proxying aggregated IGMP group membership information) is disabled on the switch. The
following subsections describe how to enable and disable spoofing by using the ip multicast spoofing
command.
Enabling the IGMP Spoofing
To enable IGMP spoofing on the system if no VLAN or SPB service is specified, use the ip multicast
spoofing command as shown below:
-> ip multicast spoofing enable
You can also enable IGMP spoofing on the specified VLAN or SPB service by entering:
-> ip multicast vlan 2 spoofing enable
-> ip multicast service 10 spoofing enable
Specifying a Static Source IP Address
By default, a source IP address is not specified when IGMP spoofing is enabled; the system automatically
determines the addresses to use for spoofing. However, a static source IP address can be specified to
overcome the need for an IP interface. If configured, the static source IP is then always used for spoofing,
regardless of the IP interface address or administrative state.
To configure a static source IP address for the system, use the ip multicast spoofing command with the
static-source-ip parameter. For example:
-> ip multicast spoofing static-source-ip 10.2.2.1
To configure a static source IP address for a specific VLAN or SPB service, use the ip multicast spoofing
command with the vlan and static-source-ip parameters. For example:
-> ip multicast vlan 2 spoofing static-source-ip 10.2.2.1
-> ip multicast service 10 spoofing static-source-ip 10.2.2.1
To remove a static source IP address for the system or a specific VLAN or SPB service, use the no form
of the ip multicast spoofing command. For example:
-> no ip multicast spoofing static-source-ip
-> no ip multicast vlan 2 spoofing static-source-ip
-> no ip multicast service 10 spoofing static-source-ip 10.2.2.1
Disabling the IGMP Spoofing
To disable IGMP spoofing on the system if no VLAN or SPB service is specified, use the ip multicast
spoofing command as shown below:
-> ip multicast spoofing disable
Or, as an alternative, enter the following command to restore the IGMP spoofing to its default setting:
-> no ip multicast spoofing
You can also disable IGMP spoofing on the specified VLAN or SPB service by entering:
-> ip multicast vlan 2 spoofing disable
-> ip multicast service 10 spoofing disable
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