Igmp Querier - Lenovo Flex System Fabric CN4093 Application Manual

IGMP Querier

1. Enable IGMP and configure the source IPv4 address for IGMP Querier on a VLAN.
2. Enable IGMP Querier on the VLAN.
3. Configure the querier election type and define the address.
4. Verify the configuration.
398
CN4093 Application Guide for N/OS 8.2
IGMP Querier allows the switch to perform the multicast router (Mrouter) role and
provide Mrouter discovery when the network or virtual LAN (VLAN) does not
have a router.
When the IGMP Querier feature is enabled on a VLAN, the switch participates in
the Querier election process and has the possibility to be elected as Querier for the
VLAN. The IGMP querier periodically broadcasts IGMP Queries and listens for
hosts to respond with IGMP Reports indicating their IGMP group memberships. If
multiple Mrouters exist on a given network, the Mrouters elect one as the querier,
which performs all periodic membership queries. The election process can be
based on IPv4 address or MAC address.
Note: When IGMP Querier is enabled on a VLAN, the switch performs the role of
IGMP querier only if it meets the IGMP querier election criteria.
Follow this procedure to configure IGMP Querier.
CN4093(config)# ip igmp enable
CN4093(config)# ip igmp querier vlan 2 source­ip 10.10.10.1
CN4093(config)# ip igmp querier vlan 2 enable
CN4093(config)# ip igmp querier vlan 2 election­type ipv4
CN4093# show ip igmp querier vlan 2
Current VLAN 2 IGMP querier settings: ON
querier type: ipv4
max response time: 100
querier interval: 125
Querier robustness: 2
source IP: 10.10.10.15
startup count: 2
startup query interval: 31
version: v3