D-Link DXS-3600 Series Reference Manual page 274

DXS-3600 Series Layer 3 Managed 10Gigabit Ethernet Switch Web UI Reference Guide
Parameter
Register Suppression
Click the Apply button to accept the changes made.
PIM for IPv6 SPT Threshold Settings
This window is used to view and configure the Shortest Path Tree (SPT) threshold settings.
To view the following window, click L3 Features > IP Multicast Routing Protocol > PIM > PIM for IPv6
> PIM for IPv6 SPT Threshold Settings, as shown below:
The fields that can be configured in SPT Threshold Settings are described below:
Parameter
SPT Threshold
Click the Apply button to accept the changes made.
PIM for IPv6 SSM Settings
This window is used the view and configure the IPv6 PIM Source-Specific Multicast (SSM) settings. PIM-
SSM builds trees that are rooted in just one source. The SSM feature forwards datagram traffic to
receivers from only those multicast sources that the receivers have explicitly joined, thus optimizing
bandwidth utilization and denying unwanted Internet broadcast traffic. Further, instead of the use of RP
and shared trees, SSM uses information found on source addresses for a multicast group. This
information is provided by receivers through the source addresses relayed to the last-hop devices by
MLD membership reports, resulting in shortest-path trees directly to the sources.
In SSM, delivery of datagrams is based on (S, G) channels. Traffic for one (S, G) channel consists of
datagrams with an IPv6 unicast source address S and the multicast group address G as the IPv6
destination address. Systems will receive this traffic by becoming members of the (S, G) channel.
Signaling is not required, but receivers must subscribe or unsubscribe to (S, G) channels to receive or not
receive traffic from specific sources. That is MLD version 2 is required for SSM to operate.
In order to achieve the full benefit of SSM, all routers in a domain should have a consistent configuration
about SSM group address range.
Description
Enter the register suppression timeout value here. The range is from 3
to 65535 seconds. When a DR receives the register-stop message, it
will start the suppression timer. During the suppression time a DR will
stop sending Register-encapsulated data to the RP. This timer should
be configured on the designated router. The value of the Register
Probe Time must be less than half the value of the Register
Suppression Time to prevent a possible negative value in the setting of
the Register-Stop Timer. The minimal value for Register Suppression
Time is 3. Select the Default option to use the default value, which is
60 seconds.
Figure 6-128 SPT Threshold Settings Window
Description
Select the SPT threshold value here. Options to choose from are 0 and
Infinity. Select the Default option to use the default setting, which is
Infinity.
•
0: Specifies to establish the source tree right at the arrival of the
first packet.
•
Infinity: Specifies to always rely on the shared tree.
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