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Cisco IOS XR Multicast Command Reference, Release 3.4
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Preface
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Multicast IPv4 and IPv6 Commands on Cisco IOS XR Software
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Multicast Source Discovery Protocol Commands on Cisco IOS XR Software
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Multicast Routing and Forwarding Commands on Cisco IOS XR Software
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Multicast PIM Commands on Cisco IOS XR Software
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Multicast Tool and Utility Commands on Cisco IOS XR Software
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Index
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Feedback
Table Of Contents
Multicast IPv4 and IPv6 Commands on Cisco IOS XR Software
interface all router disable (IGMP/MLD)
Multicast IPv4 and IPv6 Commands on Cisco IOS XR Software
This chapter describes the commands used to configure and monitor IPv4 and IPv6 protocol using Cisco IOS XR software.
The commands in this chapter apply to
•
Internet Group Management Protocol (IGMP) (Versions 1, 2, and 3), and
•
Note
IGMP Version 1 does not have a complimentary MLD version.
For detailed information about multicast routing concepts, configuration tasks, and examples, refer to the Implementing Multicast Routing on Cisco IOS XR Software configuration module.
access-group (IGMP)
To set limits on an interface for multicast group join requests by hosts, use the access-group command in the appropriate configuration mode. To return to the default behavior, use the no form of this command.
access-group access-list
no access-group access-list
Syntax Description
Defaults
If this command is not specified in interface configuration mode, the interface adopts the global access group specified in router IGMP or MLD configuration mode.
If this command is not specified in router IGMP or MLD configuration mode, the interface accepts all multicast join requests by hosts.
Command Modes
Router IGMP interface configuration (IPv4)
Router MLD interface configuration (IPv6)
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
Task ID
Examples
In the following example, hosts serviced by Packet-over-SONET/SDH (POS) interface 0/1/0/1 can join only group 225.2.2.2:
RP/0/RP0/CPU0:router# configureRP/0/RP0/CPU0:router(config)# ipv4 access-list mygroup permit 225.2.2.2 0.0.0.0RP/0/RP0/CPU0:router(config)# router igmpRP/0/RP0/CPU0:router(config-igmp)# interface pos 0/1/0/1RP/0/RP0/CPU0:router(config-igmp-if)# access-group mygroupIn the following example, an access group is configured for IPv6:
RP/0/RP0/CPU0:router# configureRP/0/RP0/CPU0:router(config)# ipv6 access-list mld-aclRP/0/RP0/CPU0:router(config-ipv6-acl)# 10 permit ipv6 any host ff3e::8000:1bb8RP/0/RP0/CPU0:router(config-ipv6-acl)# exitRP/0/RP0/CPU0:router(config)# router mld access-group mld-aclclear igmp counters
To clear IGMP traffic statistics, use the clear igmp counters command in EXEC mode.
clear igmp [ipv4] counters
Syntax Description
Defaults
No default behavior or values
Command Modes
EXEC
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
After IGMP statistics are cleared, statistics begin incrementing again.
Task ID
Examples
The following example shows sample output before and after clearing IGMP traffic statistics:
RP/0/RP0/CPU0:router# show igmp trafficIGMP Traffic CountersElapsed time since counters cleared: 18:46:34Received SentValid IGMP Packets 0 9102Queries 0 4512Reports 0 4590Leaves 0 0Mtrace packets 0 0DVMRP packets 0 0PIM packets 0 0Errors:Malformed Packets 0Bad Checksums 0Socket Errors 0Packets dropped due to invalid socket 0Packets which couldn't be accessed 0RP/0/RP0/CPU0:router# clear igmp countersRP/0/RP0/CPU0:router# show igmp trafficIGMP Traffic CountersElapsed time since counters cleared: 00:00:12Received SentValid IGMP Packets 0 1Queries 0 1Reports 0 0Leaves 0 0Mtrace packets 0 0DVMRP packets 0 0PIM packets 0 0Errors:Malformed Packets 0Bad Checksums 0Socket Errors 0Packets dropped due to invalid socket 0Packets which couldn't be accessed 0Related Commands
clear igmp group
To clear IGMP groups on one or all interfaces, use the clear igmp group command in EXEC mode.
clear igmp [ipv4] group [ip-address | type instance]
Syntax Description
Defaults
If no group address is specified, all IGMP groups are cleared.
Command Modes
EXEC
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
To clear all igmp groups, use the clear igmp group command without using an argument. To clear a particular group, use the ipname/group address or type instance argument.
The following groups cannot be cleared:
•
•
•
•
Task ID
Examples
The following example uses the show igmp group command to display the IGMP Connected Group Membership, the clear igmp group command to clear address 239.1.1.1, and the show igmp group command again to display the updated list.
RP/0/RP0/CPU0:router# show igmp group pos 0/4/0/0[IGMP Connected Group MembershipGroup Address Interface Uptime Expires Last Reporter224.0.0.2 POS0/4/0/0 2w2d never 40.40.1.1224.0.0.13 POS0/4/0/0 2w2d never 40.40.1.1224.0.0.22 POS0/4/0/0 2w2d never 40.40.1.1239.1.1.1 POS0/4/0/0 00:00:02 00:02:07 40.40.1.22RP/0/RP0/CPU0:router# clear igmp group pos 0/4/0/0RP/0/RP0/CPU0:router# show igmp group pos 0/4/0/0[IGMP Connected Group MembershipGroup Address Interface Uptime Expires Last Reporter224.0.0.2 POS0/4/0/0 2w2d never 40.40.1.1224.0.0.13 POS0/4/0/0 2w2d never 40.40.1.1224.0.0.22 POS0/4/0/0 2w2d never 40.40.1.1Related Commands
Displays the multicast groups that are directly connected to the router and that were learned through IGMP.
clear igmp reset
To clear all IGMP membership entries and reset connection in the Multicast Routing Information Base (MRIB), use the clear igmp reset command in EXEC mode.
clear igmp [ipv4] reset
Syntax Description
Defaults
No default behavior or values
Command Modes
EXEC
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
Every IGMP group membership that IGMP learns is downloaded to the MRIB database.
This command is used to clear all information from the IGMP topology table and reset the MRIB connection.
Note
Task ID
Examples
The following example clears the group memberships in MRIB:
RP/0/RP0/CPU0:router# clear igmp resetRelated Commands
Displays the multicast groups that are directly connected to the router and that were learned through IGMP.
Displays all entries in the MRIB table.
clear mld counters
To clear MLD traffic statistics, use the clear mld counters command in EXEC mode.
clear mld [ipv6] counters
Syntax Description
Defaults
No default behavior or values
Command Modes
EXEC
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
After MLD statistics are cleared, statistics begin incrementing once again.
Task ID
Examples
The following example shows how to clear MLD traffic statistics:
RP/0/RP0/CPU0:router# clear mld counters
Note
Related Commands
clear mld group
To clear MLD groups on one or all interfaces, use the clear mld group command in EXEC mode.
clear mld [ipv6] group [type instance]
Syntax Description
Defaults
If no group address is specified, all MLD groups are cleared.
Command Modes
EXEC
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
This command is used to clear user-specified or all MLD membership learned from external hosts. Use the type and number arguments to clear specific MLD membership, or if no interface arguments are specified, clear MLD membership from all interfaces. This command does not clear local static group members.
Task ID
Examples
The following example shows how to clear MLD groups for Packet-over-SONET/SDH (POS) interface 0/4/0/0:
RP/0/RP0/CPU0:router# clear mld group pos 0/4/0/0
Note
Related Commands
Displays the multicast groups that are directly connected to the router and that were learned through MLD.
clear mld reset
To clear all MLD membership entries and reset connection in the Multicast Routing Information Base (MRIB), use the clear mld reset command in EXEC mode.
clear igmp [ipv6] reset
Syntax Description
Defaults
No default behavior or values
Command Modes
EXEC
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
Every MLD group membership that MLD learns is downloaded to the MRIB database.
This command is used to clear all information from the MLD topology table and reset the MRIB connection.
Note
Task ID
Examples
The following example clears the group memberships in MRIB:
RP/0/RP0/CPU0:router# clear mld resetRelated Commands
Displays the multicast groups that are directly connected to the router and that were learned through MLD.
Displays all entries in the MRIB table.
explicit-tracking
To configure IGMP Version 3 (under IPv4) and MLD Version 2 (under IPv6) explicit host tracking, use the explicit-tracking command in the appropriate configuration mode. To disable explicit host tracking, use the no form of this command.
explicit-tracking [access-list] [disable]
no explicit-tracking
Syntax Description
Defaults
If this command is not specified in interface configuration mode, the interface adopts the explicit tracking parameter specified in router IGMP/MLD configuration mode.
If this command is not specified in router IGMP/MLD configuration mode, then explicit host tracking is disabled.Command Modes
Router IGMP configuration (IPv4)
Router IGMP interface configuration (IPv4)
Router MLD configuration (IPv6)
Router MLD interface configuration (IPv6)
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
Note
By default, IGMP supports Version 3, unless a Version 2 or Version 1 IGMP host message is detected in the network. For backward compatibility, IGMP will downgrade to run at the IGMP version level that is installed.
This feature allows the router to achieve minimal leave latencies when hosts leave a multicast group or channel. To monitor IGMP membership of hosts, use the show igmp groups command in EXEC mode.
In router configuration mode, the explicit-tracking command enables explicit host tracking for all interfaces. To disable the feature on specific interfaces, use the explicit-tracking command in interface configuration mode with the disable keyword.
Note
Task ID
Examples
The following example enables explicit host tracking for the access list named router1 on all interfaces, and disables explicit host tracking for a specific POS interface.
RP/0/RP0/CPU0:router(config)# router igmpRP/0/RP0/CPU0:router(config-igmp)# explicit-tracking router1RP/0/RP0/CPU0:router(config-igmp)# interface pos 0/1/0/0RP/0/RP0/CPU0:router(config-igmp-if)# explicit-tracking disableRelated Commands
interface all router disable (IGMP/MLD)
To disable IGMP/MLD membership tracking on all interfaces, use the interface all router disable command in the appropriate configuration mode. To return to the default behavior, use the no form of this command.
interface all router disable
no interface all router disable
Syntax Description
This command has no arguments or keywords.
Defaults
Enabled (on all enabled interfaces)
Command Modes
Router IGMP configuration (IPv4)
Router MLD configuration (IPv6)
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
Task ID
Examples
The following example disables IGMP membership tracking for all interfaces:
RP/0/RP0/CPU0:router(config)# router igmpRP/0/RP0/CPU0:router(config-igmp)# interface all router disablejoin-group
To have the router join a multicast group, use the join-group command in the appropriate configuration mode. To return to the default behavior, use the no form of this command.
join-group group-address [include | exclude] source-address
no join-group group-address [include | exclude] source-address
Syntax Description
Defaults
No multicast group memberships are predefined.
If not specified, include is the default.Command Modes
Router IGMP interface configuration (IPv4)
Router MLD interface configuration (IPv6)
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
This command permits the IP packets that are addressed to the group address to pass to the IP client process in the Cisco IOS XR software.
If all the multicast-capable routers that you administer are members of a multicast group, pinging that group causes all routers to respond. This command can be a useful administrative and debugging tool.
Another reason to have a router join a multicast group is when other hosts on the network are prevented from correctly answering IGMP/MLD queries. When the router joins the multicast group, upstream devices learn multicast routing table information for that group and keep the paths for that group active.
Caution
Task ID
Examples
In the following example, the router joins multicast group 225.2.2.2:
RP/0/RP0/CPU0:router(config)# router igmpRP/0/RP0/CPU0:router(config-igmp)# interface pos 0/1/0/0RP/0/RP0/CPU0:router(config-igmp-if)# join-group 225.2.2.2Related Commands
maximum groups
To configure the maximum number of groups used by IGMP/MLD and accepted by a router, use the maximum groups command in the appropriate configuration mode. To return to the default behavior, use the no form of this command.
maximum groups number
no maximum groups
Syntax Description
Defaults
number: 50000
Command Modes
Router IGMP configuration (IPv4)
Router MLD configuration (IPv6)
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
The maximum combined number of groups on all interfaces can be 75,000. Once the maximum groups value is met, all additional membership learned are ignored. The maximum number includes external and local membership.
The following groups obtain local membership on each interface when multicast is enabled and are added into the group totals per interface: 224.0.0.13 (for Protocol Independent Multicast [PIM]), 224.0.0.22 and 224.0.0.2 (for IGMP).
You cannot use this command to configure the maximum number of groups below the number of existing groups. For instance, if the number of groups is 39, and you set the maximum number of groups to 10, the configuration is rejected.
Furthermore, you can use the maximum groups per-interface command to configure the maximum number of groups per interface accepted by a router.
Task ID
Examples
The following example displays the number of groups (39) and the maximum number of groups configured (50,000). Through use of the maximum groups command, a configuration is committed to change the maximum number of groups to 40. Before and after configuration, the show igmp summary command is used to confirm the configuration change:
RP/0/RP0/CPU0:router# show igmp summary[IGMP summaryNumber of groups 39Maximum number of groups 50000Interface Grp No Max Grp NoLoopback0 11 25000Loopback1 10 25000Loopback2 9 25000Loopback3 9 25000POS0/3/0/0 0 25000RP/0/RP0/CPU0:router# configureRP/0/RP0/CPU0:router(config)# router igmpRP/0/RP0/CPU0:router(config-igmp)# maximum groups 10RP/0/RP0/CPU0:router(config-igmp)# commitRP/0/RP0/CPU0:May 13 12:25:49.717 : config[65704]: %LIBTARCFG-6-COMMIT : Configuration committed by user 'cisco'. Use 'show commit changes 1000000024' to view the changes.% Failed to commit one or more configuration items. Please use 'show configuration failed' to view the errorsRP/0/RP0/CPU0:router# show configuration failed[!! CONFIGURATION FAILED DUE TO SEMANTIC ERRORSrouter igmpmaximum groups 10!!% Invalid argument: The desired new maximum for the number of groups 10 must be equal or larger than the present number of groups, which is 39RP/0/RP0/CPU0:router# configureRP/0/RP0/CPU0:router(config)# router igmpRP/0/RP0/CPU0:router(config-igmp)# maximum groups 40RP/0/RP0/CPU0:router(config-igmp)# commitRP/0/RP0/CPU0:May 13 12:26:59.108 : config[65704]: %LIBTARCFG-6-COMMIT : Configuration committed by user 'cisco'. Use 'show commit changes 1000000025' to view the changes.RP/0/RP0/CPU0:router# show igmp summaryNumber of groups 39Maximum number of groups 40Interface Grp No Max Grp NoLoopback0 11 25000Loopback1 10 25000Loopback2 9 25000Loopback3 9 25000POS0/3/0/0 0 25000Related Commands
Configures the maximum number of groups per interface accepted by a router.
Displays group membership information for IGMP.
Displays group membership information for MLD.
maximum groups per-interface
To configure the maximum number of groups per interface accepted by a router, use the maximum groups per-interface command in the appropriate configuration mode. To return to the default behavior, use the no form of this command.
maximum groups per-interface number
no maximum groups per-interface
Syntax Description
Defaults
number: 20000
Command Modes
Router IGMP configuration (IPv4)
Router IGMP interface configuration (IPv4)
Router MLD configuration (IPv6)
Router MLD interface configuration (IPv6)
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
The following groups obtain local membership on each interface when multicast is enabled and are added into the group totals per interface: 224.0.0.13 (for Protocol Independent Multicast [PIM]), 224.0.0.22 and 224.0.0.2 (for IGMP). The number of groups per interface reflects both external and local group membership.
You cannot use this command to configure the maximum number of groups per interface below the number of existing groups on an interface. For instance, if the number of groups is 39, and you set the maximum number of groups to 10, the configuration is rejected.
When you use this command for a specific interface, it overrides the inheritance property of this command specified under router IGMP/MLD configuration mode.
Task ID
Examples
The following example displays the maximum number of groups per interface (25,000). A configuration is committed to change the maximum number of groups per interface to 12. Before and after configuration, use the show igmp summary command to confirm the configuration change:
RP/0/RP0/CPU0:router# show igmp summary[IGMP summaryNumber of groups 39Maximum number of groups 50000Interface Grp No Max Grp NoLoopback0 11 25000Loopback1 10 25000Loopback2 9 25000Loopback3 9 25000POS0/3/0/0 0 25000RP/0/RP0/CPU0:router# configureRP/0/RP0/CPU0:router(config)# router igmpRP/0/RP0/CPU0:router(config-igmp)# maximum groups per-interface 5RP/0/RP0/CPU0:router(config-igmp)# commitRP/0/RP0/CPU0:May 13 12:25:49.717 : config[65704]: %LIBTARCFG-6-COMMIT : Configuration committed by user 'User1'. Use 'show commit changes 1000000024' to view the changes.% Failed to commit one or more configuration items. Please use 'show configuration failed' to view the errorsRP/0/RP0/CPU0:router# show configuration failed[!! CONFIGURATION FAILED DUE TO SEMANTIC ERRORSrouter igmpmaximum groups-per-interface 5!!% Invalid argument: The desired new maximum for the number of groups-per-interface 5 must be equal or larger than the present number of groups-per-interface in each interface. Please do 'show igmp summary' to find outRP/0/RP0/CPU0:router# configureRP/0/RP0/CPU0:router(config)# router igmpRP/0/RP0/CPU0:router(config-igmp)# maximum groups per-interface 12RP/0/RP0/CPU0:router(config-igmp)# commitRP/0/RP0/CPU0:May 13 12:26:59.108 : config[65704]: %LIBTARCFG-6-COMMIT : Configuration committed by user 'User1'. Use 'show commit changes 1000000025' to view the changes.RP/0/RP0/CPU0:router# show igmp summaryNumber of groups 39Maximum number of groups 40Interface Grp No Max Grp NoLoopback0 11 12Loopback1 10 12Loopback2 9 12Loopback3 9 12POS0/3/0/0 0 12The following example configures all interfaces with 3000 maximum groups per interface except Packet-over-SONET/SDH (POS) interface 0/4/0/0, which is set to 4000:
RP/0/RP0/CPU0:router# configureRP/0/RP0/CPU0:router(config)# router igmpRP/0/RP0/CPU0:router(config-igmp)# maximum groups per-interface 3000RP/0/RP0/CPU0:router(config-igmp)# interface POS 0/4/0/0RP/0/RP0/CPU0:router(config-igmp-if)# maximum groups per-interface 4000Related Commands
Configures the maximum number of groups accepted by a router.
Displays group membership information for IGMP.
Displays group membership information for MLD.
nsf lifetime (IGMP/MLD)
To configure the maximum time for the nonstop forwarding (NSF) timeout on the IGMP/MLD process, use the nsf lifetime command in the appropriate configuration mode. To return to the default behavior, use the no form of this command.
nsf lifetime seconds
no nsf lifetime
Syntax Description
Defaults
seconds: 60
Command Modes
Router IGMP configuration (IPv4)
Router MLD configuration (IPv6)
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
The IGMP NSF process is triggered by the restart of the IGMP process. While in IGMP NSF mode, the Multicast Routing Information Base (MRIB) purges the routes installed by the previous IGMP process when the IGMP NSF process times out.
The IGMP NSF lifetime is the period for IGMP to relearn all the host membership of the attached network through membership queries and reports. During this NSF period, PIM will continue to maintain forwarding state for the local members while IGMP recovers their membership reports.
Additionally, IGMP recovers the internal receiver state from Local Packet Transport Services (LPTS) for IP group member applications (including the Auto-RP and the Session Announcement Protocol (SAP) Listener) and updates the MRIB.
Note
Task ID
Examples
The following example sets the IGMP NSF timeout value to 120 seconds:
RP/0/RP0/CPU0:router(config)# router igmpRP/0/RP0/CPU0:router(config-igmp)# nsf lifetime 120Related Commands
query-interval
To configure the frequency at which the Cisco IOS XR software sends IGMP/MLD host-query messages, use the query-interval command in the appropriate configuration mode. To return to the default frequency, use the no form of this command.
query-interval seconds
no query-interval
Syntax Description
Defaults
If this command is not specified in interface configuration mode, the interface adopts the query interval parameter specified in router IGMP/MLD configuration mode.
If this command is not specified in router IGMP/MLD configuration mode, the query interval time is 60 seconds.Command Modes
Router IGMP configuration (IPv4)
Router IGMP interface configuration (IPv4)
Router MLD configuration (IPv6)
Router MLD interface configuration (IPv6)
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
Multicast routers send host membership query messages (host-query messages) to discover which multicast groups have members on the attached networks of the router. Hosts respond with IGMP/MLD report messages indicating that they want to receive multicast packets for specific groups (that is, that the host wants to become a member of the group). Host-query messages are addressed to the all-hosts multicast group, which has the address 224.0.0.1, and has an IP time-to-live (TTL) value of 1.
The designated router for a LAN is the only router that sends IGMP/MLD host-query messages:
•
•
If the router hears no queries for the timeout period (controlled by the query-timeout command), it becomes the querier.
Note
Note
Task ID
Examples
The following example shows how to change the frequency at which the designated router sends IGMP host-query messages to 2 minutes:
RP/0/RP0/CPU0:router(config)# router igmpRP/0/RP0/CPU0:router(config-igmp)# interface pos 0/1/0/0RP/0/RP0/CPU0:router(config-igmp-if)# query-interval 120Related Commands
query-max-response-time
To configure the maximum response time advertised in IGMP/MLD queries, use the query-max-response-time command in the appropriate configuration mode. To return to the default behavior, use the no form of this command.
query-max-response-time seconds
no query-max-response-time
Syntax Description
Defaults
If this command is not specified in interface configuration mode, the interface adopts the maximum response time parameter specified in router IGMP/MLD configuration mode.
If this command is not specified in router IGMP/MLD configuration mode, the maximum response time is 10 seconds.Command Modes
Router IGMP configuration (IPv4)
Router IGMP interface configuration (IPv4)
Router MLD configuration (IPv6)
Router MLD interface configuration (IPv6)
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
This command is not supported on IGMP Version 1.
This command is used to control the maximum response time for hosts to answer an IGMP/MLD query message. Configuring a value less than 10 seconds enables the router to prune groups much faster but this action results in network burstiness as hosts are restricted to a shorter response time period.
If you configure this command in router IGMP/MLD configuration mode, parameters are inherited by all new and existing interfaces. You can override these parameters on individual interfaces in interface configuration mode.
Note
Task ID
Examples
The following example configures a maximum response time of 8 seconds:
RP/0/RP0/CPU0:router(config)# router igmpRP/0/RP0/CPU0:router(config-igmp)# interface pos 0/1/0/0RP/0/RP0/CPU0:router(config-igmp-if)# query-max-response-time 8Related Commands
query-timeout
To configure the timeout value before the router takes over as the querier for the interface, use the query-timeout command in the appropriate configuration mode. To return to the default behavior, use the no form of this command.
query-timeout seconds
no query-timeout
Syntax Description
seconds
Number of seconds that the router waits after the previous querier has stopped querying before it takes over as the querier. Range is 60 to 300.
Defaults
If this command is not specified in interface configuration mode, the interface adopts the timeout value parameter specified in router IGMP configuration mode. If this command is not specified in router IGMP configuration mode, the maximum response time is equal to twice the query interval set by the query-interval command.
Command Modes
Router IGMP configuration (IPv4)
Router IGMP interface configuration (IPv4)
Router MLD configuration (IPv6)
Router MLD interface configuration (IPv6)
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
This command is not supported on IGMP Version 1.
By default, the router waits twice the query interval specified by the query-interval command, after which, if the router has heard no queries, it becomes the querier. By default, the query interval is 60 seconds, which means that the query timeout value defaults to 120 seconds.
Note
Note
Task ID
Examples
The following example configures the router to wait 30 seconds from the time it received the last query before it takes over as the querier for the interface:
RP/0/RP0/CPU0:router(config)# router igmpRP/0/RP0/CPU0:router(config-igmp)# interface pos 0/1/0/0RP/0/RP0/CPU0:router(config-igmp-if)# query-timeout 30Related Commands
Configures the frequency at which the Cisco IOS XR software sends IGMP host-query messages.
router
To disable or enable IGMP/MLD membership tracking, use the router command in the appropriate configuration mode. To return to the default behavior, use the no form of this command.
router {disable | enable}
no router {disable | enable}
Syntax Description
Defaults
If this command is not specified in router IGMP configuration mode, router functionality is enabled on all interfaces.
Command Modes
Router IGMP interface configuration (IPv4)
Router MLD interface configuration (IPv6)
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
This command is used to enable and disable the IGMP/MLD router functionality on a specific interface. For instance, IGMP/MLD will stop queries from an interface when the router functionality is disabled on that interface. Disabling IGMP/MLD router functionality does not prevent local group membership to be announced through the group membership report.
Router functionality can be inherited through the interface all router disable command in router IGMP/MLD configuration mode, but can be overridden using the router command in interface configuration mode.
Note
Task ID
Examples
The following example disables IGMP router functionality on all multicast enabled interfaces, except Packet-over-SONET/SDH (POS) interface 0/1/0/0:
RP/0/RP0/CPU0:router(config)# router igmpRP/0/RP0/CPU0:router(config-igmp)# interface all router disableRP/0/RP0/CPU0:router(config-igmp)# interface pos 0/1/0/0RP/0/RP0/CPU0:router(config-igmp-if)# router enableRelated Commands
router igmp
To enter IGMP configuration mode, use the router igmp command in global configuration mode. To return to the default behavior, use the no form of this command.
router igmp
no router igmp
Syntax Description
This command has no arguments or keywords.
Defaults
No default behavior or values
Command Modes
Global configuration
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
From router IGMP configuration mode, you can configure the maximum response time advertised in IGMP queries and modify the host query interval.
Note
Task ID
Examples
The following example enters router IGMP configuration mode and configures the frequency at which the Cisco IOS XR software sends IGMP host-query messages:
RP/0/RP0/CPU0:router(config)# router igmpRP/0/RP0/CPU0:router(config-igmp)# query-interval 160Related Commands
Enables multicast routing and forwarding on all enabled interfaces of the router and enters multicast routing configuration mode.
router mld
To enter router MLD configuration mode, use the router mld command in global configuration mode. To return to the default behavior, use the no form of this command.
router mld
no router mld
Syntax Description
This command has no arguments or keywords.
Defaults
No default behavior or values
Command Modes
Global configuration
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
From router MLD configuration mode, you can configure the maximum response time advertised in MLD queries and modify the host query interval.
Note
Task ID
Examples
The following example enters router MLD configuration mode and configures the frequency at which the Cisco IOS XR software sends MLD host-query messages:
RP/0/RP0/CPU0:router(config)# router mldRP/0/RP0/CPU0:router(config-mld)# query-interval 160Related Commands
Enables multicast routing and forwarding on all enabled interfaces of the router and enters multicast routing configuration mode.
show igmp groups
To display the multicast groups that are directly connected to the router and that were learned through IGMP, use the show igmp groups command in EXEC mode.
show igmp [old-output] groups [group-address | type instance | detail | explicit | not-active | summary]
Syntax Description
Defaults
No default behavior or values
Command Modes
EXEC
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
If you omit all optional arguments, the show igmp groups command displays (by group address and interface name) all the multicast memberships that the directly connected networks have subscribed.
Task ID
Examples
The following is sample output from the show igmp groups command:
RP/0/RP0/CPU0:router# show igmp groupsIGMP Connected Group MembershipGroup Address Interface Uptime Expires Last Reporter224.0.255.1 POS0/2/1/0 18:51:41 0:02:15 172.20.37.192224.2.226.60 POS0/2/1/0 1:51:31 0:02:17 172.20.37.192224.2.127.255 POS0/2/1/0 18:51:45 0:02:17 172.20.37.192226.2.2.2 POS0/2/1/1 18:51:47 never 0.0.0.0224.2.0.1 POS0/2/1/0 18:51:43 0:02:14 172.20.37.192225.2.2.2 POS0/2/1/0 18:51:43 0:02:21 172.20.37.33225.2.2.2 POS0/2/1/1 18:51:47 never 0.0.0.0225.2.2.4 POS0/2/1/0 18:18:02 0:02:20 172.20.37.192225.2.2.4 POS0/2/1/1 18:23:32 0:02:55 172.20.36.128Table 2 describes the significant fields shown in the display.
Related Commands
show igmp interface
To display IGMP multicast-related information about an interface, use the show igmp interface command in EXEC mode.
show igmp [old-output] interface [type instance | state-on | state-off]
Syntax Description
Defaults
No default behavior or values
Command Modes
EXEC
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
If you omit the optional arguments, the show igmp interface command displays information about all interfaces.
Task ID
Examples
The following is sample output from the show igmp interface command:
RP/0/RP0/CPU0:router# show igmp interfaceMgmtEth0/0/CPU0/0 is up, line protocol is up Internet address is 239.1.1.1/16 IGMP is disabled on interface MgmtEth0/1/CPU0/0 is up, line protocol is up Internet address is 239.1.1.1/16 IGMP is disabled on interface POS0/4/0/0 is up, line protocol is up Internet address is 239.1.1.1/24 IGMP is enabled on interface Current IGMP version is 3 IGMP query interval is 60 seconds IGMP querier timeout is 125 seconds IGMP max query response time is 10 seconds Last member query response interval is 1 seconds IGMP activity: 8 joins, 4 leaves IGMP querying router is 142.50.12.1 (this system) POS0/4/0/1 is up, line protocol is up Internet address is 239.2.1.1/24 IGMP is enabled on interface Current IGMP version is 3 IGMP query interval is 60 seconds IGMP querier timeout is 125 seconds IGMP max query response time is 10 seconds Last member query response interval is 1 seconds IGMP activity: 6 joins, 3 leaves IGMP querying router is 239.3.1.1 (this system) POS0/4/0/2 is up, line protocol is up Internet address is 239.1.1.1/24 IGMP is enabled on interface Current IGMP version is 3 IGMP query interval is 60 seconds IGMP querier timeout is 125 seconds IGMP max query response time is 10 seconds Last member query response interval is 1 seconds IGMP activity: 6 joins, 3 leaves IGMP querying router is 239.4.1.1 (this system) POS0/4/0/3 is up, line protocol is up Internet address is 239.1.1.1/24 IGMP is enabled on interface Current IGMP version is 3 IGMP query interval is 60 seconds IGMP querier timeout is 125 seconds IGMP max query response time is 10 seconds Last member query response interval is 1 seconds IGMP activity: 6 joins, 3 leaves IGMP querying router is 239.5.1.1 (this system)Table 3 describes the significant fields shown in the display.
Related Commands
show igmp nsf
To display the state of NSF operation in IGMP, use the show igmp nsf command in EXEC mode.
show igmp [old-output] nsf
Syntax Description
Defaults
No default behavior or values
Command Modes
EXEC
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
This command displays the current multicast NSF state for IGMP. The NSF state that is displayed may be either normal or activated for NSF. The latter state indicates that recovery is in progress due to an IGMP failure. The total NSF timeout and time remaining are displayed until NSF expiration.
Task ID
Examples
The following is sample output from the show igmp nsf command:
RP/0/RP0/CPU0:router# show igmp nsfIP IGMP Non-Stop Forwarding Status:Multicast routing state: Non-Stop Forwarding ActivatedNSF Lifetime: 00:01:00NSF Time Remaining: 00:00:06Table 4 describes the significant fields shown in the display.
Related Commands
show igmp summary
To display group membership information for IGMP, use the show igmp summary command in EXEC mode.
show igmp [old-output] summary
Syntax Description
Defaults
No default behavior or values
Command Modes
EXEC
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
This command is used to display the total group membership. The value for number of groups is the total number of group members on all interfaces. The value for maximum number of groups is the total number of external and local members possible for all interfaces. The maximum number of groups and the default value for the maximum number of groups is 50,000 members. The maximum number of groups per interface and the default value for the maximum number of groups per interface is 25,000 members.
Task ID
Examples
The following example shows the number of groups per interface that are IGMP members and the maximum number of groups that can become members on each interface:
RP/0/RP0/CPU0:router# show igmp summaryNumber of groups 39Maximum number of groups 50000Interface Grp No Max Grp NoLoopback0 11 25000Loopback1 10 25000Loopback2 9 25000Loopback3 9 25000Table 5 describes the significant fields shown in the display.
Related Commands
Displays the multicast groups that are directly connected to the router and that were learned through IGMP.
show igmp traffic
To display all the IGMP traffic-related counters, use the show igmp traffic command in EXEC mode.
show igmp [old-output] traffic
Syntax Description
Defaults
No default behavior or values
Command Modes
EXEC
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
This command is used to display the state of all counters for IGMP traffic. It gives information about the length of time the counters have been active, and the count of different types of IGMP packets received, such as queries, leaves, and reports. Also, this command keeps a count of all the erroneous IGMP packets received.
Task ID
Examples
The following is sample output from the show igmp traffic command:
RP/0/RP0/CPU0:router# show igmp trafficIGMP Traffic CountersElapsed time since counters cleared: 15:27:38Received SentValid IGMP Packet 2784 5576Queries 0 2784Reports 2784 2792Leaves 0 0Mtrace packets 0 0DVMRP packets 0 0PIM packets 0 0Errors:Malformed Packets 0Bad Checksums 0Socket Errors 0Packets dropped due to invalid socket 0Packets which couldn't be accessed 0Table 6 describes the significant fields shown in the display.
Related Commands
show mld groups
To display the multicast groups that are directly connected to the router and that were learned through MLD, use the show mld groups command in EXEC mode.
show mld [old-output] groups [group-address | type instance | explicit | detail | not-active | summary]
Syntax Description
Defaults
No default behavior or values
Command Modes
EXEC
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
If you omit all optional arguments, the show mld groups command displays (by group address and interface name) all the multicast memberships that the directly connected networks have subscribed.
Task ID
Examples
The following is sample output from the show mld groups command:
RP/0/RP0/CPU0:router# show mld groupsMLD Connected Group MembershipPOS0/2/0/0Group Address : ff02::2Last Reporter : fe80::b000:ff:fe00:fb00Uptime : 01:56:39Expires : neverGroup Address : ff02::dLast Reporter : fe80::b000:ff:fe00:fb00Uptime : 01:56:39Expires : neverGroup Address : ff02::16Last Reporter : fe80::b000:ff:fe00:fb00Uptime : 01:56:39Expires : neverTable 2 describes the significant fields shown in the display.
Related Commands
show mld interface
To display MLD multicast-related information about an interface, use the show mld interface command in EXEC mode.
show mld [old-output] interface [type instance | state-on | state-off]
Syntax Description
Defaults
No default behavior or values
Command Modes
EXEC
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
If you omit the optional arguments, the show mld interface command displays information about all interfaces.
Task ID
Examples
The following is sample output from the show mld interface command:
RP/0/RP0/CPU0:router# show mld interfaceLoopback0 is up, line protocol is upInternet address is fe80::5000:ff:fe00:5c00MLD is enabled on interfaceCurrent MLD version is 2MLD query interval is 125 secondsMLD querier timeout is 255 secondsMLD max query response time is 10 secondsLast member query response interval is 1 secondsMLD activity: 3 joins, 0 leavesMLD querying router is fe80::5000:ff:fe00:5c00 (this system)TenGigE0/5/0/2 is up, line protocol is upInternet address is fe80::215:c6ff:fe3e:8c85MLD is enabled on interfaceCurrent MLD version is 2MLD query interval is 125 secondsMLD querier timeout is 255 secondsMLD max query response time is 10 secondsLast member query response interval is 1 secondsMLD activity: 5 joins, 0 leavesMLD querying router is fe80::215:c6ff:fe3e:8c85 (this system)TenGigE0/5/0/3 is up, line protocol is upInternet address is fe80::215:c6ff:fe3e:8c86MLD is enabled on interfaceCurrent MLD version is 2MLD query interval is 125 secondsMLD querier timeout is 255 secondsMLD max query response time is 10 secondsLast member query response interval is 1 secondsMLD activity: 5 joins, 0 leavesMLD querying router is fe80::215:c6ff:fe3e:8c86 (this system)TenGigE0/5/0/3.4 is up, line protocol is upInternet address is fe80::215:c6ff:fe3e:8c86MLD is enabled on interfaceCurrent MLD version is 2MLD query interval is 125 secondsMLD querier timeout is 255 secondsMLD max query response time is 10 secondsLast member query response interval is 1 secondsMLD activity: 3 joins, 0 leavesMLD querying router is fe80::215:c6ff:fe3e:8c86 (this system)TenGigE0/5/0/3.5 is up, line protocol is upInternet address is fe80::215:c6ff:fe3e:8c86MLD is enabled on interfaceCurrent MLD version is 2MLD query interval is 125 secondsMLD querier timeout is 255 secondsMLD max query response time is 10 secondsLast member query response interval is 1 secondsMLD activity: 3 joins, 0 leavesMLD querying router is fe80::215:c6ff:fe3e:8c86 (this system)Table 3 describes the significant fields shown in the display.
Related Commands
show mld nsf
To display the state of NSF operation in MLD, use the show mld nsf command in EXEC mode.
show mld [old-output] nsf
Syntax Description
Defaults
No default behavior or values
Command Modes
EXEC
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
This command displays the current multicast NSF state for MLD. The NSF state that is displayed may be either normal or activated for NSF. The latter state indicates that recovery is in progress due to an MLD failure. The total NSF timeout and time remaining are displayed until NSF expiration.
Task ID
Examples
The following is sample output from the show mld nsf command:
RP/0/RP0/CPU0:router# show mld nsfIP MLD Non-Stop Forwarding Status:Multicast routing state: Non-Stop Forwarding ActivatedNSF Lifetime: 00:01:00NSF Time Remaining: 00:00:06Table 4 describes the significant fields shown in the display.
Related Commands
show mld summary
To display group membership information for MLD, use the show mld summary command in EXEC mode.
show mld [old-output] summary
Syntax Description
Defaults
No default behavior or values
Command Modes
EXEC
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
This command is used to display the total group membership. The value for number of groups is the total number of group members on all interfaces. The value for maximum number of groups is the total number of external and local members possible for all interfaces. The maximum number of groups and the default value for the maximum number of groups is 50,000 members. The maximum number of groups per interface and the default value for the maximum number of groups per interface is 25,000 members.
Task ID
Examples
The following example shows the number of groups per interface that are MLD members and the maximum number of groups that can become members on each interface:
RP/0/RP0/CPU0:router# show mld summaryNumber of groups 39Maximum number of groups 50000Interface Grp No Max Grp NoLoopback0 11 25000Loopback1 10 25000Loopback2 9 25000Loopback3 9 25000Table 5 describes the significant fields shown in the display.
Related Commands
Displays the multicast groups that are directly connected to the router and that were learned through MLD.
show mld traffic
To display all the MLD traffic-related counters, use the show mld traffic command in EXEC mode.
show mld [old-output] traffic
Syntax Description
Defaults
No default behavior or values
Command Modes
EXEC
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
This command is used to display the state of all counters for MLD traffic. It gives information about the length of time the counters have been active, and the count of different types of MLD packets received, such as queries, leaves, and reports. Also, this command keeps a count of all the erroneous MLD packets received.
Task ID
Examples
The following is sample output from the show mld traffic command:
RP/0/RP0/CPU0:router# show mld trafficMLD Traffic CountersElapsed time since counters cleared: 15:27:38Received SentValid MLD Packet 2784 5576Queries 0 2784Reports 2784 2792Leaves 0 0Mtrace packets 0 0DVMRP packets 0 0PIM packets 0 0Errors:Malformed Packets 0Bad Checksums 0Socket Errors 0Packets dropped due to invalid socket 0Packets which couldn't be accessed 0Table 6 describes the significant fields shown in the display.
Related Commands
static-group
To configure the router to be a statically configured member of the specified group on the interface, or to statically forward for a multicast group onto the interface, use the static-group command in router IGMP configuration mode. To return to the default behavior, use the no form of this command.
static-group group-address [source-address | inc-mask mask count cnt]
no static-group group-address [source-address | inc-mask mask count cnt]
Syntax Description
Defaults
A router is not a statically connected member of an IP multicast group.
Command Modes
Router IGMP interface configuration (IPv4)
Router MLD interface configuration (IPv6)
Command History
Release 3.3.0
This command was introduced on the Cisco CRS-1 router and Cisco XR 12000 Series Router.
Release 3.4.0
No modification.
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
When you configure the static-group command, packets to the group are switched out the interface, provided that packets were received on the correct reverse path forwarding (RPF) interface.
The static-group command differs from the join-group command. The join-group command allows the router to join the multicast group and draw traffic to an IP client process (that is, the route processor). If you configure both the join-group and static-group command for the same group address, the join-group command takes precedence and the group behaves like a locally joined group.
Note
Task ID
Examples
In the following example, the router statically joins two multicast groups 225.2.2.2 and 225.2.2.4 for the specific source 1.1.1.1 :
RP/0/RP0/CPU0:router(config)# router igmpRP/0/RP0/CPU0:router(config-igmp)# interface pos 0/1/0/0RP/0/RP0/CPU0:router(config-igmp-if)# static-group 225.2.2.2 inc-mask 0.0.0.2 count 2 1.1.1.1
version
To configure an IGMP/MLD version for the router, use the version command in the appropriate configuration mode. To restore the default value, use the no form of this command.
version {1 | 2 | 3}
no version
Syntax Description
1
IGMP Version 1. Available for IGMP and MLD.
2
IGMP Version 2. Available for IGMP and MLD.
3
IGMP Version 3. Available for IGMP only.
Defaults
If this command is not specified in interface configuration mode, the interface adopts the IGMP/MLD version parameter specified in router IGMP configuration mode.
If this command is not specified in router IGMP/MLD configuration mode, IGMP uses Version 3 and MLD uses Version 1.
Command Modes
Router IGMP configuration
Router MLD configuration
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
All routers on the subnet must be configured with the same version of IGMP/MLD. For example, a router running Cisco IOS XR software does not automatically detect Version 1 systems and switch to Version 1. Hosts can have any IGMP/MLD version and the router will correctly detect their presence and query them appropriately.
The query-max-response-time and query-timeout commands require IGMP Version 2 or 3 or MLD Version 1 or 2.
Note
Task ID
Examples
The following example configures the router to use IGMP Version 3:
RP/0/RP0/CPU0:router(config)# router igmpRP/0/RP0/CPU0:router(config-igmp)# version 3Related Commands
Configures the maximum response time advertised in IGMP/MLD queries.
Configures the timeout value before the router takes over as the querier for the interface.
