D-Link DXS-3600 Series Cli Reference Manual page 1026

DXS-3600 Series Layer 3 Managed 10Gigabit Ethernet Switch CLI Reference Guide
Command Mode
Global Configuration Mode.
Command Default Level
Level: 12.
Usage Guideline
This command only affects PIM SM operation.
PIM source-specific multicast (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.
Example
This example shows how to configure the SSM service for the IPv6 address range, ff30::/96, defined in
the access list "ssm-group".
Switch# configure terminal
Switch(config)# ipv6 access-list ssm-group
Switch(config-ipv6-acl)# permit any ff30::/96
Switch(config-ipv6-acl)# exit
Switch(config)# ipv6 pim ssm range ssm-group
Switch(config)#
82-16 ipv6 pim sg-keepalive-time
This command is used to configure the PIM6-SM multicast routing entry keep-alive timer.
ipv6 pim sg-keepalive-time SECONDS
no ipv6 pim sg-keepalive-time
Parameters
SECONDS
Default
By default, this value is 210 seconds.
Command Mode
Global Configuration Mode.
Specifies the period during which the PIM router will maintain the (S,
G) state in the absence of explicit (S, G) local membership or (S, G)
join messages received to maintain it. The time range is from 120 to
65535 seconds.
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