UMN:CLI
User Manual
V5824G
354
To disable the switch to send a query solicitation when TCN is received, use the following
command.
Command
Mode
Description
no ip igmp snooping tcn query
solicit
[
address
]
Global
Disables the switch to send a query solicitation when
TCN is received.
IGMP Snooping TCN Debug
To enable debugging of all IGMP snooping TCN, use the following command.
Command
Mode
Description
debug igmp
snooping tcn
Enable
Enables IGMP snooping Topology Change Notification
(TCN) debugging.
no debug igmp
snooping tcn
Disables IGMP snooping Topology Change Notification
(TCN) debugging.
9.2.4
IGMPv3 Snooping
Immediate Block
IGMPv3 immediate block feature allows a host to block sources with the block latency, 0
(zero) by referring to the explicit tracking database. When receiving a membership report
with the state-change record from a host that is no longer interested in receiving multicast
traffic from a certain source, the switch compares the source list for the host in the explicit
tracking database with the source list in the received membership report. If both are
matching, the switch removes the source entry from the list in the database, and stops
forwarding the multicast traffic to the host; no group-source-specific query message is
needed for the membership leave process.
To enable IGMPv3 immediate block, use the following command.
Command
Mode
Description
ip igmp snooping immediate-
block
Global
Enables immediate block globally.
ip igmp snooping vlan
VLANS
immediate-block
Enables immediate block on a VLAN.
VLANS: VLAN ID (1-4094)
To disable IGMPv3 immediate block, use the following command.
Command
Mode
Description
no ip igmp snooping immediate-
block
Global
Disables immediate block globally.
no ip igmp snooping vlan
VLANS
immediate-block
Disables immediate block on a VLAN.
VLANS: VLAN ID (1-4094)
IGMPv3 immediate block is enabled by default.
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