I was reading the 642-901 vol 2 study guide about IGMP v2 and it was discussed there that to determine the Designated Querier the routers:
"When there are two IGMP routers on the same Ethernet segnet (broadcast domain), the router with the highest IP address is the designated querier." - p247
I googled around to check if there are some documents that support this and I found this site:
"If a multicast router hears a Query message from a router with a
lower IP address, it becomes a Non-Querier on that network."
So if I understand it correctly if the router sees an IGMP router with a lower IP address it steps back (becomes a non-querier) and lets the lower ip address router become the designated querier.
So this is confusing. Can anyone confirm which is true? Is the study guide wrong?