Re: IGMP report suppression

Princy Elizabeth <[email protected]>
Newsgroups gmane.ietf.magma
Message-ID <[email protected]>
IGMP V1 and V2 reports are sent per group. Consider a LAN with 10 hosts each interested in the same 10 groups. If reports suppression were not employed, every Query interval there would be 10 reports sent out by each of the 10 hosts ==> 100 reports which unnecessarily increase the traffic on the LAN. For the router, it is sufficient to know that there is one interested member for a group on the LAN. So 1 report per group would have sufficed. This precisely is what is done through report suppression. In IGMP V3, a single report can contain the report for all the groups a host is interested in. Thus there is no need for report suppression here since the number of reports would be generally, equal to the number of hosts only. 
   
  I hope that clarifies your query.
   
  - Princy


P K S <[email protected]> wrote:
          Why is the IGMP report suppression required in the first place? 
   
  Regards 
   Parit
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