D-Link xStack DGS-3620 Series Reference Manual page 466

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xStack DGS-3620 Series Layer 3 Managed Stackable Gigabit Switch Web UI Reference Guide
"authentication failed list." In general case, when the multicast group/port is already learned by the switch, it won't
do the authentication again. It only processes the packet as standard.
IGMP authentication processes IGMP leaves as follows: When the host sends leave message for the specific
multicast group, the Switch follows the standard procedure for leaving a group and then sends an Accounting-
Request to the accounting server for notification. If there is no answer from the accounting server after T2 time, the
Switch resends the Accounting-Request to the server. The maximum number of retry times is N2.
To view this window, click Security > IGMP Access Control Settings as shown below:
The fields that can be configured are described below:
Parameter
Unit
From Port / To Port
State
Figure 9-53 IGMP Access Control Settings window
Description
Select the unit you want to configure.
Use the drop-down menus to select a range of ports to be enabled as compound
authentication ports.
Use the drop-down menu to configure the IGMP authentication status. If no parameter
is chosen, Auth_accounting will be selected. This is for compatible application.
Disable - Disables both the authentication and accounting function on the specified
port.
Auth_accounting - After the client authenticated, the accounting message will be sent
to the RADIUS.
Auth_only - After the client authenticated, the accounting message will not be sent to
the RADIUS.
Accounting_only - Authentication is not needed. If the client joins a group, the
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