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Source Specific Multicast (SSM) is a datagram delivery model that best supports
one-to-many applications, also known as broadcast applications. SSM is a core network
technology of IP multicast targeted for audio and video broadcast application
environments.
For the SSM delivery mode, an IP multicast receiver host must use IGMP Version 3
(IGMPv3) to subscribe to channel (S, G). By subscribing to this channel, the receiver host
is indicating that it wants to receive IP multicast traffic sent by source host S to group G.
The network will deliver IP multicast packets from source host S to group G to all hosts in
the network that have subscribed to the channel (S, G).
SSM does not require group address allocation within the network, only within each source
host. Different applications running on the same source host must use different SSM
groups. Different applications running on different source hosts can arbitrarily reuse SSM
group addresses without causing any excess traffic on the network.
Addresses in the range 232.0.0.0/8 (232.0.0.0 to 232.255.255.255) are reserved for SSM by
IANA. In the switch, you can configure SSM for arbitrary IP multicast addresses also.
Function name:
IGMP Snooping- IPv4 SSM Information
Function description:
The function is used to display the SFM information for the switch.
Each page shows up to 99 entries from the IGMPv3 SSM (Source Specific Multicast)
Information table, default being 20, selected through the "entries per page" input field.
When first visited, the web page will show the first 20 entries from the beginning of the
IGMPv3 Information Table.
The "Start from VLAN", and "group" input fields allow the user to select the starting point
in the IGMPv3 Information Table. Clicking the button will update the displayed table
starting from that or the closest next IGMPv3 Information Table match. In addition, the two
input fields will - upon a button click - assume the value of the first displayed entry,
allowing for continuous refresh with the same start address.
The will use the last entry of the currently displayed table as a basis for the next lookup.
When the end is reached the text "No more entries" is shown in the displayed table. Use the
button to start over.
VigorSwitch P2261 User's Guide
The simple counts will be refreshed automatically on the
UI screen.
The simple counts will be refreshed manually when user
use mouse to click on "Refresh" button.
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