- Bronze, 100 points or more
See, I just read the chapter on multicasting in my old BCMSN textbook, and it tells me that under IGMPv1, one router is responsible for tracking all the membership reports and querying about their multicast ambitions every 60 seconds.
But it doesn't say anything about how to configure a router to be the querier, or whether there's some automatic mechanism for that.
How does a router accede to IGMPv1 Querierhood?
No, read carefully :)
If there are multiple routers on a LAN, a designated router (DR) must be elected to avoid duplicating multicast traffic for connected hosts. PIM routers follow an election process to select a DR. The PIM router with the highest IP address becomes the DR.
The DR is responsible for the following tasks:
â¢Sending PIM register and PIM Join and Prune messages toward the rendezvous point (RP) to inform it about host group membership.
â¢Sending IGMP host-query messages.
â¢Sending host-query messages by default every 60 seconds in order to keep the IGMP overhead on hosts and networks very low.