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6 multicast tcn flooding – Siemens S223 User Manual

Page 295

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

A50010-Y3-C150-2-7619 295

To disable the port where multicast router is connected, use the following command.

Command Mode

Description

no ip igmp snooping mrouter

port

{PORTS | cpu}

Disables the port where multicast router is connected
on the system

no ip igmp snooping vlan

VLANS

mrouter port {PORTS |

cpu

}

Global

Disables the port where multicast router is connected
on a VLAN interface.

Mrouter Port Learning Method

For the hiD 6615 S323, multicast-capable router ports are added to the forwarding table
for every Layer 2 multicast entry. The switch learns such ports through snooping on PIM
packets. The switch snoops on PIM packets on all VLANs.

To configure Mrouter port learning method, use the following commands.

Command Mode

Description

ip igmp snooping mrouter learn

pim

Configures the mrouter port learning method on the
system.

ip igmp snooping vlan

VLANS

mrouter learn pim

Configures the mrouter port learning method on a
VLAN interface.

no ip igmp snooping mrouter

learn pim

Disables the mrouter port learning method on the sys-
tem.

no ip igmp snooping vlan

VLANS

mrouter learn pim

Global

Disables the mrouter port learning method on a VLAN
interface.

Displaying Mrouter Configuration

To display IGMP snooping mrouter configuration, use the following command.

Command Mode

Description

show ip igmp snooping mrouter

Shows the mrouter configuration on the system.

show ip igmp snooping vlan

VLANS

mrouter

Enable

Global
Bridge

Shows the mrouter configuration and detail information
on a VLAN interface.

9.2.5.6

Multicast TCN Flooding

An IGMP snooping-disabled switch does not flood multicast traffic to all ports in a VLAN
when a spanning-tree Topology Change Notification (TCN) is received. A topology can
change in a VLAN and it may invalidate previously learned IGMP snooping information. A
host that was on one port before the topology change may move to another port after the
topology change. The hiD 6615 S223/S323 switch helps to deliver multicast traffic is de-
livered to all multicast receivers in that VLAN when the topology changes. When the
spanning tree protocol is running in a VLAN, a spanning tree topology change notification
(TCN) is issued by the root switch in the VLAN.

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