ip igmp snooping

To enable fast leave processing and IGMP snooping for a specific VLAN and IGMP snooping configuring a list of multicast router ports for a specific VLAN when IGMP snooping is globally enabled, configure statically the blocked router ports for a VLAN, the IGMP snooping switch as a querier for a specific VLAN, IGMP snooping static multicast related information, and operating version of IGMP PROXY on the upstream router port for a VLAN, set parameters such as the maximum response code inserted in general queries sent to host, the router port purge time-out interval for a VLAN, the maximum time interval to decide that another querier is present in the network, the time period with which the general queries are sent by the IGMP snooping switch or the maximum number of general query messages sent out on switch startuphen configured as querier on a VLAN, use the command ip igmp snooping in VLAN Configuration Mode. The no form of the command disables IGMP snooping in the switch (or specific VLAN) and sets all parameters to their default values. When IGMP snooping is disabled globally, it is disabled in all VLAN interfaces.

ip igmp snooping

ip igmp snooping
{ [blocked-router } { <ifXtype> } { <iface_list>}] }
{ [fast-leave] }
{ [max-response-code } { <(0 - 255)>] }
{ [mrouter } { <ifXtype> } { <iface_list>}] }
{ [mrouter-port } { <ifXtype> } { <iface_list> } { {time-out } { <short(60-600)> }
{ | version } { {v1 } { | v2 } { | v3}] }
{ [multicast-vlan profile } { profile } { <Profile ID (0-4294967295)>] }
{ [other-querier-present-interval } { <value (120-1215) seconds>] }
{ [querier } { {address } { | <ucast_addr>}] }
{ [query-interval } { <(60 - 600) seconds>] }
{ [startup-query-count } { <(2 - 5>] }
{ [startup-query-interv } { <(15 - 150) seconds>] }
{ [static-group } { <mcast_addr> } { ports } { <ifXtype> } { <iface_list>}] }
{ [version } { {v1 } { | v2 } { | v3}] }

no ip igmp snooping

no ip igmp snooping
{ [blocked-router } { <ifXtype> } { <iface_list>}] }
{ [fast-leave] }
{ [max-response-code] }
{ [mrouter } { <ifXtype> } { <iface_list>}] }
{ [mrouter-port } { <ifXtype> } { <iface_list> } { {time-out } { <short(60-600)> } { | version] }
{ [multicast-vlan profile }
{ [other-querier-present-interval }
{ [querier }
{ [query-interval }
{ [startup-query-count }
{ [startup-query-interv } { <(15 - 150) seconds>] }
{ [static-group } { <mcast_addr> } { ports } { <ifXtype> } { <iface_list>}] }

Parameters

Parameter Type Description
blocked-router   Enter to configure statically the blocked router ports for a VLAN. When configured as a blocked router, the queries, PIM DVMRP and data messages are discarded. The corresponding port entry is removed from the forwarding database. The ports to be configured as blocked router ports must not be configured as static router ports.
Note:

The ports to be configured as blocked router ports must not be configured as static router ports.
<ifXtype>   Enter to configure tthe type of interface to be employed on the port. The interface can be:
  • fastethernet – Officially referred to as 100BASE-T standard. This is a version of LAN standard architecture that supports data transfer up to 100 megabits per second.
  • gigabitethernet – A version of LAN standard architecture that supports data transfer up to 1 gigabit per second.extreme-ethernet – A version of Ethernet that supports data transfer up to 10 gigabits per second. This Ethernet supports only full duplex links.
<iface_list>   Enter to set a list of multicast router ports for the list of interfaces or a specific interface identifier. This value is a combination of slot number and port number separated by a slash for interface type other than internal-lan and port-channel. Only i-lan or port-channel ID is provided for interface types internal-lan and port-channel. Use comma as a separator without space while configuring list of interfaces. Example: 0/1, 0/3 or 1, 3
fast-leave   Enter to enable fast leave processing and IGMP snooping for a specific VLAN. It enables IGMP snooping only for the specific VLAN when IGMP snooping is globally disabled. When the fast leave feature is enabled, port information is removed from a multicast group entry immediately after fast leave message is received. By default, fast leave processing is disabled.
Note:

Fast leave configurations done in a VLAN when IGMP snooping is disabled in a VLAN will be applied only when IGMP snooping is enabled in the VLAN.
max-response-code   Enter to set the maximum response code inserted in general queries sent to host. The unit of the response code is tenth of second.
<(0 - 255)> Integer Enter a value for the maximum response code inserted in general queries sent to host. It ranges from 0 to 255 with a default of 100.
mrouter   Enter to enable IGMP snooping and configures a list of multicast router ports for a specific VLAN when IGMP snooping is globally enabled. This will enable IGMP snooping only for the specific VLAN, if IGMP snooping is globally disabled.Any IGMP message received on a switch is forwarded only on the router-ports and not on the host ports. In this manner, the IGMP snooping functionality avoids flooding of IGMP query messages from the host to the entire network.
Note:

The list of multicast router ports configured while IGMP snooping is disabled in the VLAN is applied only when the IGMP snooping is enabled in the VLAN.
<ifXtype>   Enter to configure the list of multicast router ports for the specified type of interface. The interface can be:
  • fastethernet – Officially referred to as 100BASE-T standard. This is a version of LAN standard architecture that supports data transfer up to 100 megabits per second.
  • gigabitethernet – A version of LAN standard architecture that supports data transfer up to 1 gigabit per second.extreme-ethernet – A version of Ethernet that supports data transfer up to 10 gigabits per second. This Ethernet supports only full duplex links.
<iface_list>   Enter to set a list of multicast router ports for the list of interfaces or a specific interface identifier. This value is a combination of slot number and port number separated by a slash for interface type other than internal-lan and port-channel. Only i-lan or port-channel ID is provided for interface types internal-lan and port-channel. Use comma as a separator without space while configuring list of interfaces. Example: 0/1, 0/3 or 1, 3
mrouter-port   Enter to configure the router port purge time-out interval for a VLAN. The time interval after which the proxy assumes there are no v1/v2 routers present on the upstream port. While the older querier timer is running, the proxy replies to all queries with consolidated v1/v2 reports. When the timer expires, if the v2/v3 queriers are not present and the port is dynamically learnt, the port is purged. If the port is static, router port, the proxy replies to all queries with new version of v2/v3 consolidated reports.
Note:

The router ports must be statically configured for the VLAN.
<ifXtype>   Enter to configure the list of multicast router ports for the specified type of interface. The interface can be:
  • fastethernet – Officially referred to as 100BASE-T standard. This is a version of LAN standard architecture that supports data transfer up to 100 megabits per second.
  • gigabitethernet – A version of LAN standard architecture that supports data transfer up to 1 gigabit per second.extreme-ethernet – A version of Ethernet that supports data transfer up to 10 gigabits per second. This Ethernet supports only full duplex links.
<iface_list>   Enter to set a list of multicast router ports for the list of interfaces or a specific interface identifier. This value is a combination of slot number and port number separated by a slash for interface type other than internal-lan and port-channel. Only i-lan or port-channel ID is provided for interface types internal-lan and port-channel. Use comma as a separator without space while configuring list of interfaces. Example: 0/1, 0/3 or 1, 3
time-out   Enter to configure the router port purge time-out interval.
<short(60-600)> Integer Enter a value for the router port purge time-out interval. This value ranges from 60 to 600 seconds with a default of 125.
version   Enter to configure operating version of the IGMP snooping.
Note:

The router ports must be statically configured for the VLAN.
v1   Enter for IGMP snooping Version 1.
v2   Enter for IGMP snooping Version 2.
v3   Enter for IGMP snooping Version 3. This is the default.
multicast-vlan   Enter to configure profile ID to VLAN mapping for multicast VLAN classification. The switch is configured with list of entries such as multicast group, multicast source and filter mode. These entries are maintained in access profiles. Each profile is associated with a particular VLAN which is categorized as multicast VLAN. When any untagged report or leave message is received (that is, packet with no tag in a customer bridge or packet with no S-tag in a provider or 802.1ad bridge), and if the group and source address in the received packet matches any rule in this profile, then the received packet is classified to be associated to the VLAN (that is, multicast VLAN) to which the profile is mapped.
Note:
  • Multicast snooping mode should be IP based.
  • This command can be executed only after creating a multicast profile and setting the action for the created profile as permit.
  • The configurations done by this command will take effect only if the profile is activated.
profile   Enter to configure profile ID to VLAN mapping for multicast VLAN classification.
<Profile ID (0-4294967295)> Integer Enter a value to the multicast profile ID for a particular VLAN. This value ranges from 0 to 4294967295. The default is 0.
other-querier-present-interval-vlan   Enter to set the maximum time interval for deciding that another querier is present in the network. Within this time interval, if the querier receives response from another querier, then the one with a higher IP address is announced as the querier for the network. The other querier present interval must be greater than or equal to ((Robustness Variable * Query Interval) + (Query Response Interval/2)). Here, Robustness value is 2.
Note:

The switch should be configured as a querier for the other querier present command to be effective.
<(130 - 1225) seconds> Integer Enter a value for the maximum time interval for deciding that another querier is present in the network. This time interval ranges between 120 and 1215 seconds. The default is 255 seconds.
querier   Enter to configure the IGMP snooping switch as a querier for a specific VLAN. When configured as a querier, the switch sends IGMP query messages. The query messages will be suppressed if there are any routers in the network. The default is Non-querier.
address   Enter to denote the interface VLAN or switch IP address to be used as source address.
<ucast_addr>   Enter to configure the query messages to be sent to all member ports of VLAN. the IGMP query forward administrative control status as all VLAN member ports. This is done to find out if there are any interested listeners in the network.
query-interval   Enter to set the time period with which the general queries are sent by the IGMP snooping switch when configured as querier on a VLAN. The switch sends querier messages in proxy mode and proxy-reporting mode to all downstream interfaces for this time interval. The value range is between 60 to 600 seconds.
Note:
  • The switch must be configured as a querier for this configuration to be imposed.
  • In proxy reporting mode, general queries are sent on all downstream interfaces with this interval only if the switch is the Querier.
  • In proxy mode, general queries will be sent on all downstream interfaces with this interval.
<(60 - 600) seconds> Integer Enter a value for the time period with which the general queries are sent by the IGMP snooping switch when configured as querier on a VLAN. The value range is between 60 to 600 with default of 125.
startup-query-count   Enter to set the maximum number of general query messages sent out on switch startup when the switch is configured as a querier. Startup query messages are sent to announce the presence of the switch along with its identity. The startup query count is manually configured to change the existing count.
<2 - 5> Integer Enter a value for the maximum number of general query messages sent out on switch startup when the switch is configured as a querier. This value ranges from 2 to 5. The default is 2.
startup-query-interval   Enter to set the time period with which the general queries are sent by the IGMP snooping switch during startup of the querier election process.
Note:

The switch should be configured as querier for the startup query interval command to produce results.

The startup query interval should be less than or equal to ¼ of the query interval
<(15 - 150) seconds> Integer Enter a value for the time period with which the general queries are sent by the IGMP snooping switch during startup of the querier election process. This time interval ranges between 15 and 150 seconds and should be less than or equal to query interval/ 4. The default is 31 seconds.
static-group   Enter to configure IGMP snooping static multicast related information.
Note: The command executes only when IGMP snooping is enabled in the switch.
<mcast_addr>   Enter to configure the multicast address. This value ranges from 225.0.0.0. to 239.255.255.255
ports   Enter to enable the snooping query transmission status which generates IGMP query messages.
<ifXtype>   Enter to configure the snooping static multicast for the specified type of interface. The interface can be:
  • fastethernet – Officially referred to as 100BASE-T standard. This is a version of LAN standard architecture that supports data transfer up to 100 megabits per second.
  • gigabitethernet – A version of LAN standard architecture that supports data transfer up to 1 gigabit per second.extreme-ethernet – A version of Ethernet that supports data transfer up to 10 gigabits per second. This Ethernet supports only full duplex links.
<iface_list>   Enter to configure the snooping static multicast for the list of interfaces or a specific interface identifier. This value is a combination of slot number and port number separated by a slash for interface type other than internal-lan and port-channel. Only i-lan or port-channel ID is provided for interface types internal-lan and port-channel. Use comma as a separator without space while configuring list of interfaces. Example: 0/1, 0/3 or 1, 3
version   Enter to configure operating version of the IGMP snooping.
Note:

The router ports must be statically configured for the VLAN.
v1   Enter for IGMP snooping Version 1.
v2   Enter for IGMP snooping Version 2.
v3   Enter for IGMP snooping Version 3. This is the default.

Mode

VLAN Configuration Mode

Examples

iS5Comm(config)# vlan 55

iS5Comm (config-vlan)# ip igmp snooping blocked-router gigabitethernet 0/2

iS5Comm (config-vlan)# ip igmp snooping fast-leave

iS5Comm(config-vlan)# ip igmp snooping max-response-code 10

iS5Comm (config-vlan)# ip igmp snooping mrouter gigabitethernet 0/1

iS5Comm(config-vlan)# ip igmp snooping mrouter-port gigabitethernet 0/1 time-out 150

iS5Comm(config-vlan)# ip igmp snooping mrouter-port gigabitethernet 0/1 version v1

iS5Comm (config-vlan)# ip igmp snooping multicast-vlan profile 1

iS5Comm(config-vlan) # ip igmp snooping other-querier-present-interval 1215

iS5Comm (config-vlan)# ip igmp snooping querier

iS5Comm(config-vlan) # ip igmp snooping startup-query-interval 100

iS5Comm (config-vlan) # ip igmp snooping startup-query-count 4

iS5Comm(config-vlan) # ip igmp snooping startup-query-interval 100

iS5Comm (config-vlan)# ip igmp snooping static-group 225.3.2.2 ports gigabitethernet 0/2

iS5Comm(config-vlan)#ip igmp snooping version v2

Parent topic: IGMP Snooping