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Cisco Bug: CSCvs19187 - Poor loadbalancing with PIM multipath hash source-nexthop or source-group

Last Modified

Feb 03, 2020

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases

5.1.3.MCAST

Description (partial)

Symptom:
Multicast groups not being load balanced over multiple ECMP paths despite the command:

router pim
  multipath hash source-nexthop

or

router pim
  multipath hash source-group

Conditions:
The source or the groups have the same Most Significant Byte (MSB).  The hashing function when using source-nexthop or source-group only uses the MSB for the hash.
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Bug Details Include

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  • Status
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