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FIGURE 3-60. IGMP SNOOPING PORT GROUP FILTERING PROFILE SCREEN
Parameter description:
Port: The logical port for the settings.
Filtering Profile: Select the IPMC Profile as the filtering condition for the specific port. Summary about the designated profile will be
shown by clicking the view button.
Profile Management Button: You can inspect the rules of the designated profile by using the eye button. It lists the rules associated
with the designated profile.
Buttons:
- Apply – Click to save changes.
- Reset - Click to undo any changes made locally and revert to previously saved values.
3.11.2 MLD SNOOPING
A network node that acts as a source of IPv6 multicast traffic is only an indirect participant in MLD snooping—it just provides
multicast traffic, and MLD doesn’t interact with it.
NOTE: In an application such as desktop conferencing, a network node may act as both a source and an MLD host; but MLD interacts
with that node only in its role as an MLD host.
A source node creates multicast traffic by sending packets to a multicast address. In IPv6, addresses with the first eight bits set (that
is, “FF” as the first two characters of the address) are multicast addresses, and any node that listens to such an address will receive
the traffic sent to that address. Application software running on the source and destination systems cooperates to determine what
multicast address to use.
NOTE: This is a function of the application software, not of MLD.
When MLD snooping is enabled on a VLAN, the switch acts to minimize unnecessary multicast traffic. If the switch receives
multicast traffic destined for a given multicast address, it forwards that traffic only to ports on the VLAN that have MLD hosts for that
address. It drops that traffic for ports on the VLAN that have no MLD hosts.
CHAPTER 3: SYSTEM CONFIGURATION
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