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Configure an IGMP querier for your the cluster's multicast group(s) f you cannot disable if IGMP snooping from the VLAN cannot be disabled.
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WarningEnabling IGMP snooping without an IGMP querier results in nodes that cannot communicate with each other. |
See your the router documentation for details on enabling an IGMP querier.
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Some switches are configured to act as IGMP queriers in an IPv4 network for multicast group memberships, but other switches are not unless configured appropriately. Since multicast routing is not configured by default on all switches, an IGMP querier may not exist on your the network unless you have one has been specifically configured one.
Swarm can be configured to perform this function if a querier is not available in the network. Swarm elects a node in the cluster to act as an IGMP querier when configured to do so, guaranteeing multicast membership queries are sent so cluster operation can continue. The Swarm IGMP querier has no impact on networks that do not have with IGMP Snooping enableddisabled.
To enable an IGMP querier on the Swarm cluster itself, set it via the SNMP MIB entry networkIGMPTimeout and enable the network.igmpTimeout configuration parameter in Swarm.
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By default, Swarm uses IGMPv2 responses to host membership queries. The igmpVersion parameter can be used to force the use of version 1, 2, or 3.