Lantech LGS-2624C User manual - page 98
2-5.6 IPv4 SSM information
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.
Web Interface
To display the IGMPv3 IPv4 SSM Information in the web interface:
1. Click Configuration, IGMP Snooping, IPv4 SSM Information
2. If you want to auto-refresh the information then you need to evoke the
―Auto-refresh‖.
3.
Click ― Refresh― to refresh a entry of the IGMPv3 IPv4 SSM Information.
4. Click
―<< or >> ― to move to previous or next entry.
Parameter description:
Navigating the IGMPv3 Information Table
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