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Page 291 / 998 Scroll up to view Page 286 - 290
IGMP Snooping command reference
IGMP snooping
3-29
iMG/RG Software Reference Manual (IGMP)
Example
--> bridge set igmpsnoop v1timer 200
See also
BRIDGE SHOW
3.1.5.1.23 IGMP SET FORWARDALL
Syntax
IGMP SET FORWARDALL
< enabled|disabled >
Description
This command allows you to enable/disable your router’s ability to forward multicast traf-
fic to ALL interfaces. By default, multicast traffic is only forwarded to interfaces on which
there is IGMP Proxy group membership.
Setting froward all is an alternative to IGMP Proxy. If you set forwardall enabled, it unsets
the upstream interface and disables IGMP proxy.
Options
The following table gives the range of values for each option that can be specified with
this command and a default value (if applicable).
Example
--> igmp set
forwardall enabled
See also
IGMP SHOW FORWARDALL
3.1.5.1.24 IGMP SET LASTMBERQUERYINTVL
Syntax
IGMP SET LASTMEMBERQUERYINT <lastmberqueryintvl>
Description
This command sets the value for the last member query interval.
When the Gateway
receives the what it believes is an IGMP Leave from the last device in a Multicast Group
on a particular port- the Last Member Query Interval is used to specify the time the
Gateway waits for an IGMP Report after sending an IGMP Query message for that mul-
ticst stream down that port. If the Gateway does not receive an IGMP Report in that
interval then it sends an IGMP leave to the Multicast Router.
Option
Description
Default value
v1timer
The v1timer variable value in seconds. Valid range is 1
to 65535.
400
Option
Description
Default value
enabled/disabled
Enabled forwards multicast traffic to all interfaces. Dis-
abled forwards multicast traffic only to interfaces on
which there are IGMP Proxy group members
disabled
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IGMP snooping
IGMP Snooping command reference
iMG/RG Software Reference Manual (IGMP)
3-30
Options
The following table gives the range of values for each option that can be specified with
this command and a default value (if applicable).
Example
--> igmp set
lastmberqueryintvl 5
See also
IGMP SHOW STATUS
3.1.5.1.25 IGMP SET
QUERYINTVL
Syntax
IGMP SET QUERYINTVL < queryintvl >
Description
This command sets the value for the query interval.
The Query Interval is the time
between General Queries sent by the proxy Querier.
Options
The following table gives the range of values for each option that can be specified with
this command and a default value (if applicable).
Example
--> igmp set
queryintvl 200
See also
IGMP SET QUERYRESPONSEINTVL
3.1.5.1.26 IGMP SET QUERYRESPONSEINTVL
Syntax
IGMP SET QUERYRESPONSEINTVL < queryresponseintvl >
Description
This command sets the value for the query response interval.
The Max Response Time
inserted into the periodic General Queries.
Options
The following table gives the range of values for each option that can be specified with
this command and a default value (if applicable).
Option
Description
Default value
lastmberqueryintvl
The last member query interval value in seconds.
Valid range is 1 to 255.
1
Option
Description
Default value
Queryintvl
The query interval value in seconds.
Query interval
cannot be less than or equal to the query response
interval. Valid range is 2 to 255
125
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IGMP Snooping command reference
IGMP snooping
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iMG/RG Software Reference Manual (IGMP)
Example
--> igmp set
queryresponseintvl 20
See also
IGMP SET QUERYINTVL
3.1.5.1.27 IGMP SET
ROBUSTNESS
Syntax
IGMP SET ROBUSTNESS < robustness >
Description
This command sets the value for the network robustness, allowing tuning based upon
expected packet loss on the network.
This robustness value will modify the time, in
proxy mode only, between the leave on the LAN facing network and the leave being sent
on the WAN facing network will be robustness times the lastmemberqueryintvl.
Options
The following table gives the range of values for each option that can be specified with
this command and a default value (if applicable).
Example
--> igmp set robustness 3
3.1.5.1.28 IGMP SET UPSTREAMINTERFACE
Syntax
IGMP SET UPSTREAMINTERFACE < ip_interface|none >
Description
This command enables the router’s IGMP Proxy, and sets one of the router’s existing IP
interfaces as teh upstream interface; all other router interfaces are designated down-
stream interfaces. The upstream interface implements the Host portion of the IGMP pro-
tocol, and the downstream interfaces implement the Router portion of the IGMP
protocol. The IGMP Proxy may be disabled by setting the upstream interface to none.
Options
The following table gives the range of values for each option that can be specified with
this command and a default value (if applicable).
Option
Description
Default value
queryresponseintvl
The query response interval value in seconds.
Query response interval cannot be greater than or
equal to the query interval. Valid range is 1 to 254.
10
Option
Description
Default value
robustness
The the robustness variable value is a retry count
for IGMP packet transmissions. Valid range is 2 to
255.
2
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IGMP snooping
IGMP Snooping command reference
iMG/RG Software Reference Manual (IGMP)
3-32
Example
--> igmp set
upstream interface ip1
See also
IGMP SHOW
3.1.5.1.29 IGMP SHOW FORWARDALL
Syntax
IGMP SHOW FORWARDALL
Description
This command displays the status of the ForwardAll configuration.
Example
--> iigmp show forwardall
IGMP Forwarder:
Forward All : false
See also
IGMP SET FORWARDALL
3.1.5.1.30 IGMP SHOW STATUS
Syntax
IGMP SHOW STATUS
Description
This command displays the following information about the status of IGMP proxy:
•
IGMP Proxy group membership per interface details
•
Interface name and querier status
•
Group address
Example
--> igmp proxy show status
Multicast group membership:
Interface (querier)
| Group address
---------------------|-----------------
ip_video (yes)
| 239.255.255.250
---------------------------------------
3.1.5.1.31 IGMP SHOW TIMERCONFIGURATION
Syntax
IGMP SHOW TIMERCONFIGURATION
Option
Description
Default value
ip_interface
The name of an existing router interface that you
want to set as the upstream interface
N/A
none
Disables IGMP proxy
N/A
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IGMP Snooping command reference
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iMG/RG Software Reference Manual (IGMP)
Description
This command displays the All the timer settings for the IGMP Proxy. This includes the
Robustness setting, Query Interval, Query response interval and the last member query
interval.
Example
--> igmp proxy show status
IGMP Proxy configuration:
Robustness : 2
Query Int : 125
Query Rsp Int : 10
Last Member Query Int : 1
See also
IGMP SET LASTMEMBERQUERYINT
IGMP SET QUERYINTERVAL|
IGMP SET QUERYRSPINTERVAL
IGMP SET ROBUSTNESS
3.1.5.1.32 IGMP SHOW UPSTREAMINTERFACE
Syntax
IGMP SHOW UPSTREAMINTERFACE
Description
This command displays the status of the upstream interface. If an upstream interface has
been set using the IGMP SET UPSTREAMINTERFACE command, this command displays
the current setting.
Example
--> igmp show upstreaminterface
IGMP Proxy configuration
Upstream If : ip0
See also
IGMP SET UPSTREAMINTERFACE
3.1.5.1.33
IGMP SNOOPING DISABLE
Syntax
IGMP SNOOPING DISABLE <vlan_name>
Description
This command disables the layer- 2 IGMP snooping feature previously enabled with the
IGMP SNOOPING ENABLE command.
Options
The following table gives the range of values for each option that can be specified with
this command and a default value (if applicable).

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