clear ip igmp counters
To clear the Internet Group Management Protocol (IGMP) interface counters, use the clear ip igmp counters command in Privileged EXEC mode.
Syntax
clear ip igmp counters [interface-id]
Parameters
- interface-id—(Optional) Interface Identifier
Command Mode
Privileged EXEC mode
User Guidelines
Use the clear ip igmp counters command to clear the IGMP counters, which keep track of the number of joins and leaves received. If you omit the optional
interface-id argument, the clear ip igmp counters command clears the counters on
all interfaces.
Example
The following example clears the counters for VLAN 100:
switchxxxxxx# clear ip igmp counters vlan 100 |
ip igmp last-member-query-count
To configure the Internet Group Management Protocol (IGMP) last member query counter, use the ip igmp last-member-query-count command in Interface Configuration mode. To restore the default value, use the no form of this command.
Syntax ip igmp last-member-query-count count no ip igmp last-member-query-count
Parameters
count—The number of times that group- or group-source-specific queries are sent upon receipt of a message indicating a leave. (Range: 1–7)
Default Configuration
A value of IGMP Robustness variable.
Command Mode
Interface Configuration mode
User Guidelines
Use the ip igmp robustness command to change the IGMP last member query counter.
Example
The following example changes a value of the IGMP last member query counter to 3:
switchxxxxxx(config)# interface vlan 1switchxxxxxx(config-if)# ip igmp last-member-query-count 3switchxxxxxx(config-if)# exit |
ip igmp last-member-query-interval
To configure the Internet Group Management Protocol (IGMP) last member query interval, use the ip igmp last-member-query-interval command in Interface Configuration mode. To restore the default IGMP query interval, use the no form of this command.
Syntax
ip igmp last-member-query-interval milliseconds no ip igmp last-member-query-interval
Parameters
- milliseconds—Interval, in milliseconds, at which IGMP group-specific host query messages are sent on the interface. (Range: 100–25500).
Default Configuration
The default IGMP last member query interval is 1000 milliseconds.
Command Mode
Interface Configuration mode
User Guidelines
Use the ip igmp last-member-query-interval command to configure the IGMP last member query interval on an interface.
Example
The following example shows how to increase the the IGMP last member query interval to 1500 milliseconds:
switchxxxxxx(config)# interface vlan 100switchxxxxxx(config-if)# ip igmp last-member-query-interval 1500switchxxxxxx(config-if)# exit |
ip igmp query-interval
To configure the frequency at which the IGMP querier sends Internet Group Management Protocol (IGMP) host-query messages from an interface, use the ip igmp query-interval command in Interface Configuration mode. To restore the default IGMP query interval, use the no form of this command.
Syntax
ip igmp query-interval seconds no ip igmp query-interval
Parameters
- seconds—Frequency, in seconds, at which the switch sends IGMP query messages from the interface. The range is from 30 to 18000.
Default Configuration
The default IGMP query interval is 125 seconds.
Command Mode
Interface Configuration mode
User Guidelines
Use the ip igmp query-interval command to configure the frequency at which the IGMP querier sends IGMP host-query messages from an interface. The IGMP querier sends query-host messages to discover which multicast groups have members on the attached networks of the router.
The query interval must be bigger than the maximum query response time.
Example
The following example shows how to increase the frequency at which the IGMP querier sends IGMP host-query messages to 180 seconds:
switchxxxxxx(config)# interface vlan 100switchxxxxxx(config-if)# ip igmp query-interval 180switchxxxxxx(config-if)# exit |
ip igmp query-max-response-time
To configure the maximum response time advertised in Internet Group Management Protocol (IGMP) queries, use the ip igmp query-max-response-time command in Interface Configuration mode. To restore the default value, use the no form of this command.ip igmp query-max-response-time seconds no ip igmp query-max-response-time
Parameters
- seconds—Maximum response time, in seconds, advertised in IGMP queries. (Range: 5–20)
Default Configuration 10 seconds.
Command Mode
Interface Configuration mode
User Guidelines
This command controls the period during which the responder can respond to an IGMP query message before the router deletes the group.
This command controls how much time the hosts have to answer an IGMP query message before the router deletes their group. Configuring a value of fewer than 10 seconds enables the router to prune groups faster.
The maximum query response time must be less than the query interval.
Note. If the hosts do not respond fast enough, they might be pruned inadvertently. Therefore, the hosts must know to respond faster than 10 seconds (or the value you configure).
Example
The following example configures a maximum response time of 8 seconds:
switchxxxxxx(config)# interface vlan 100switchxxxxxx(config-if)# ip igmp query-max-response-time 8switchxxxxxx(config-if)# exit |
ip igmp robustness
To configure the Internet Group Management Protocol (IGMP) robustness variable, use the ip igmp robustness command in Interface Configuration mode. To restore the default value, use the no form of this command.
Syntax ip igmp robustness count no ip igmp robustness
Parameters
- count—The number of expected packet loss on a link. Parameter range. (Range: 1–7).
Default Configuration The default value is 2.
Command Mode
Interface Configuration mode
User Guidelines
Use the ip igmp robustness command to change the IGMP robustness variable.
Example
The following example changes a value of the IGMP robustness variable to 3:
switchxxxxxx(config)# interface vlan 1switchxxxxxx(config-if)# ip igmp robustness 3switchxxxxxx(config-if)# exit |
ip igmp version
To configure which version of Internet Group Management Protocol (IGMP) the router uses, use the ip igmp version command in Interface Configuration mode. To restore the default value, use the no form of this command.
ip igmp version {1 | 2 | 3}
no ip igmp version
Parameters
- 1—IGMP Version 1.
- 2—IGMP Version 2.
- 3—IGMP Version 3.
Default Configuration
2
Command Mode
Interface Configuration mode
User Guidelines
Use the commnad to change the default version of IGMP>
Example
The following example configures the router to use IGMP Version 2:
switchxxxxxx(config)# interface vlan 100switchxxxxxx(config-if)# ip igmp version 2switchxxxxxx(config-if)# exit |
show ip igmp counters
To display the Internet Group Management Protocol (IGMP) traffic counters, use the show ip igmp counters command in User EXEC mode.
Syntax
show ip igmp counters [interface-id]
Parameters
- interface-id—(Optional) Interface Identifier.
Command Mode
User EXEC mode
User Guidelines
Use the show ip igmp counters command to check if the expected number of IGMP protocol messages have been received and sent.
If you omit the optional interface-id argument, the show ip igmp counters command displays counters of all interfaces.
Example
The following example displays the IGMP protocol messages received and sent:
switchxxxxxx# show ip igmp counters vlan 100VLAN 100Elapsed time since counters cleared:00:00:21Failed received Joins: 0Total IGMPv1 received messages: 0Total IGMPv2 received messages: 10Total IGMPv3 received messages: 0Total invalid received messages: 0General Sent Queries: 0Specific Sent Queries: 0 |
show ip igmp groups
To display the multicast groups that are directly connected to the router and that were learned through Internet Group Management Protocol (IGMP), use the show ip igmp groups command in User EXEC mode.
show ip igmp groups [group-name | group-address | interface-id] [detail]
Parameters
- group-name | group-address—(Optional) IP address or name of the multicast group.
- interface-id—(Optional) Interface identifier.
- detail—(Optional) Displays detailed information about individual sources.
Command Mode
User EXEC mode
User Guidelines
Use the show ip igmp groups [detail] command to display all directly connected groups.
Use the show ip igmp groups [group-name | group-address] [detail] command to display one given directly connected group.
Use the show ip igmp groups interface-id [detail] command to display all groups directly connected to the given interface.
Examples
Example 1. The following is sample output from the show ip igmp groups command. It shows all of the groups joined by VLAN 100:
switchxxxxxx# show ip igmp groups vlan 100IGMP Connected Group MembershipExpires: never - switch itself has joined the groupGroup Address Interface Expires224.1.1.1 VLAN 100 00:01:30 224.10.12.79 VLAN 100 never225.1.1.1 VLAN 100 00:00:27 |
Example 2. The following is sample output from the show ip igmp groups command using the detail keyword:
switchxxxxxx# show ip igmp groups detailExpires: zero value - INCLUDE state; non-zero value - EXCLUDE stateInterface: VLAN 100Group: 225.1.1.1Router mode: INCLUDELast reporter: 10.0.119.133 Group Timer Expires: 00:20:11Group source list:Source Address Expires20.1.1.1 00:04:08120.1.1.1 00:02:01Group: 226.1.1.2Router mode: EXCLUDELast reporter: 100.1.12.130Group Timer Expiry: 00:22:12Exclude Mode Expiry (Filter) Timer: 00:10:11 Group source list:Source Address Expires2.2.2.1 00:04:08192.168.1.1 00:04:0812.1.1.10 00:00:0040.3.4.2 00:00:00 |
Verge Documentation – English//IGMP Commands
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show ip igmp groups summary
To display the number of (*, G) and (S, G) membership reports present in the Internet Group Management Protocol (IGMP) cache, use the show ip igmp groups summary command in User EXEC mode.
show ip igmp groups summary
Parameters
This command has no arguments or keywords.
Command Mode
User EXEC mode
User Guidelines
The show ip igmp groups summary command displays the number of directly connected multicast groups.
Example
The following is sample output from the show ip igmp groups summary command:
switchxxxxxx# show ip igmp groups summaryIGMP Route SummaryNo. of (*,G) routes = 5No. of (S,G) routes = 0 Field Descriptions:No. of (*,G) routes = 5—Displays the number of groups present in the IGMP cache.No. of (S,G) routes = 0—Displays the number of include and exclude mode sources present in the IGMP cache. |
show ip igmp interface
To display multicast-related information about an interface, use the show ip igmp interface command in User EXEC mode.
Syntax
show ip igmp interface [interface-id]
Parameters
- interface-id—(Optional) Interface identifier.
Command Mode
User EXEC mode
User Guidelines
If you omit the optional interface-id argument, the show ip igmp interface command displays information about all interfaces.
Example
The following is sample output from the show ip igmp interface command for Ethernet interface 2/1/1:
switchxxxxxx# show ip igmp interface vlan 100VLAN 100 is upAdministrative IGMP Querier IP address is 1.1.1.1Operational IGMP Querier IP address is 1.1.1.1Current IGMP version is 3Administrative IGMP robustness variable is 2 seconds Operational IGMP robustness variable is 2 secondsAdministrative IGMP query interval is 125 secondsOperational IGMP query interval is 125 secondsAdministrative IGMP max query response time is 10 secondsOperational IGMP max query response time is 10 secondsAdministrative Last member query response interval is 1000 milliseconds Operational Last member query response interval is 1000 milliseconds |
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