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igmp querier address
we run two linux clusters. they use different vlans. they are attached to the stack using LAGS . Now we need to set up IGMP querier and IGMP snooping . Per this document https://kb.netgear...
Hi,
These querier addresses can be anything you want really. It is not any actual ip address. What is it then? It is used as part of an election process. There can only be one querier active in a network. If multiple queriers are configured then an election process will begin. Who will be elected the active querier? The switch that has the lowest ip address value configured, in the querier ip field.
So, it is not a good idea to set the querier ip to the same as the switch. It should instead be setup up as an election model. What I would do, is set querier address 1.1.1.1 on the switch I want to be igmp querier primarily. The others I would set 2.2.2.2, 3.3.3.3, etc. As a hierarchical system: if the current querier goes down then the switch with the next lowest querier ip value would take over as querier.
This is important because you probably want your core/distribution switch to be the main querier.
Cheers
thank you for that. as suggested I used the per vlan mode. it is a great help to have your advise on this forum!
No problem at all. Happy to help :)
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