BSR - hash mask length field

From: Adhu Ajit (adhu_ajit@yahoo.com)
Date: Fri Nov 03 2006 - 19:26:58 ART

Folks,
   
  ip pim bsr-candidate [intf] [hash-mask-length] [priority}
   
  I looked this up in the Cisco CD and I got:
   
  hash-mask-length: Length of a mask (32 bits maximum) that is to be ANDed with the group address before the hash function is called. All groups with the same seed hash (correspond) to the same RP. For example, if this value is 24, only the first 24 bits of the group addresses matter. This fact allows you to get one RP for multiple groups.
   
   
  I dont fully understand this option. Can someone please explain with an example ?
   
  Thanks,
  Adhu.

 
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