Siemens S223, S323 user manual PIM-SSM Group, PIM Snooping

User Manual	UMN:CLI
SURPASS hiD 6615 S223/S323 R1.5

9.3.9PIM-SSM Group

To define the Source Specific Multicast (SSM) range of IP multicast addresses, use the following command. When an SSM range of IP multicast addresses is defined by the ip pim ssm command, no Multicast Source Discovery Protocol (MSDP) Source-Active (SA) messages will be accepted or originated in the SSM range.

Command	Mode	Description
ip pim ssm range {<1-99> AC-		Defines the SSM range of IP multicast address.
		1-99: simple access list
CESS-LIST}
	Global	ACCESS-LIST: IP named standard access list
ip pim ssm default		Configures the SSM by default.
no ip pim ssm		Disables the command.

9.3.10PIM Snooping

PIM Snooping is used to reduce unnecessary bandwidth by restricting data and multicast control packets which transmitted between each port. In networks where a Layer 2 switch interconnects several routers, the switch floods IP multicast packets on all multicast router ports by default, even if there are no multicast receivers downstream. If PIM Snooping is enabled, the switch restricts multicast packets for each IP multicast group to only those multicast router ports that have downstream receivers joined to that group. And the switch learns which multicast router ports need to receive the multicast traffic within a specific VLAN by listening to the PIM hello messages, PIM join and prune messages.

To configure PIM Snooping, use the following command.

Command	Mode	Description
ip pim snooping		Enables PIM Snooping function on the switch.
ip pim snooping vlan VLANS	Global	Enables PIM Snooping function on a specific interface.
no ip pim snooping		Disables the PIM Snooping command.
no ip pim snooping vlan VLANS

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To delete all L2 PIM snooping multicast groups of a specified port, multicast address or vlan, use the following command.

	Command			Mode	Description
clear ip	pim	snooping	groups		Deletes all PIM snooping groups and source addresses
[A.B.C.D]				Enable	of a specified multicast group address.
clear ip	pim	snooping groups			Deletes all PIM snooping groups and source addresses
				Global
[port PORTS]					of a specified port.
				Bridge
clear ip	pim	snooping	groups		Deletes all of the multicast router addresses and DR of
[vlan VLANS]					a specified VLAN.

By default, PIM Snooping is disabled. To operate PIM Snooping, IGMP Snooping should be enabled as well.

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