TRENDnet TI-RG262i - Page 57

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TRENDnet User’s Guide
Managed Industrial L2 Switch
54
Port IGMP Querier Mode
⚫ Auto:
The Switch uses the port as an IGMP query port if the port receives IGMP query
packets.
⚫ Fixed:
The Switch always treats the port(s) as IGMP query port(s). This is for when
connecting an IGMP multicast server to the port(s). The Switch always forwards the
client’s report/leave packets to the port.
Normally, the port is connected to an IGMP server.
⚫ Edge:
The Switch does not use the port as an IGMP query port. The IGMP query packets
received by this port will be dropped.
Normally, the port is connected to an IGMP client.
Note: The Switch will forward the IGMP join and leave packets to the query port.
Configurations:
Users can enable/disable the IGMP Snooping on the Switch. Users also can enable/disable
the IGMP Snooping on a specific VLAN. If the IGMP Snooping on the Switch is disabled,
the IGMP Snooping is disabled on all VLANs even some of the VLAN IGMP Snooping are
enabled.
Default Settings
If received packets are not received after 400 seconds, all multicast entries will be
deleted.
The default global IGMP snooping state is disabled.
The default VLAN IGMP snooping state is disabled for all VLANs.
The unknown multicast packets will be dropped.
The default port Immediate Leave state is disabled for all ports.
The default port Querier Mode state is auto for all ports.
The IGMP snooping Report Suppression is disabled.
Notices: There are a global state and per VLAN states. When the global state is disabled,
the IGMP snooping on the Switch is disabled even per VLAN states are enabled. When the
global state is enabled, user must enable per VLAN states to enable the IGMP Snooping
on the specific VLAN.
CLI Configuration
Node
Command
Description
enable
show igmp-snooping
This command displays the current IGMP
snooping configurations.
enable
show igmp-counters
This command displays the current IGMP
snooping counters.
enable
show igmp-counters
(port|vlan)
This command displays the current IGMP
snooping counters per port or per vlan.
configure
igmp-snooping (disable
| enable)
This command disables / enables the IGMP
snooping on the switch.
configure
igmp-snooping vlan
VLANID
This command enables the IGMP snooping
function on a VLAN or range of VLANs.
configure
no igmp-snooping vlan
VLANID
This command disables the IGMP snooping
function on a VLAN or range of VLANs.
configure
igmp-snooping
unknown-multicast
(drop|flooding)
This command configures the process for
unknown multicast packets when the IGMP
snooping function is enabled.
drop: Drop all of the unknown multicast
packets.
interface
igmp-querier-mode
(auto|fixed|edge)
This command specifies whether or not and
under what conditions the port(s) is (are)
IGMP query port(s). The Switch forwards
IGMP join or leave packets to an IGMP query
port, treating the port as being connected to
an IGMP multicast router (or server). You
must enable IGMP snooping as well.