H3C Technologies H3C S3600 Series Switches - Manual (Page 462)

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In VLAN view
Follow these steps to configure a static router port in VLAN view:
To do... Use the command... Remarks
Enter system view system-view —
Enter VLAN view vlan vlan-id —
Configure a specified port as a
static router port multicast static-router-port
interface-type interface-number
Required
By default, no static router port
is configured.
Disabling a Port from Becoming a Router Port
A MAC-forced forwarding (MFF) network isolates hosts at Layer 2 and allows multicast packets to pass
through user ports. However, the following case may occur:
If host A joins a multicast group, it sends IGMP membership reports, and then the switch connected to it
forwards the messages out every router port. If the user port on the switch connecting to host B
becomes a router port, host B may receive the IGMP membership report, and thus obtain other
information of host A from the message.
To avoid this, you can disable a port of the S3600 series switches from becoming a router port so that
this port will not forward IGMP membership report messages.
Follow these steps to disable a port from becoming a router port:
To do... Use the command... Remarks
Enter system view system-view —
Enter Ethernet port view
interface interface-type
interface-number
—
Disable the port from
becoming a router port
igmp-snooping query-pkt-deny
Required
Not disabled by default.
z This feature is recommended in MFF networks only.
z For details about MFF, refer to ARP Operation.
Configuring a Port as a Simulated Group Member
Simulated joining in IGMP Snooping is implemented in the same way as in IGMP except that IGMP
Snooping establishes and maintains IGMP Snooping entries.
Enabling simulated joining in VLAN interface view
Follow these steps to enable simulated joining in VLAN interface view: