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Cisco Bug: CSCsy80812 - uRPF loadbalancing cases programming issue

Last Modified

May 16, 2018

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases


Description (partial)


For high loadbalancing configurations (more than 255 interfaces to reach a prefix coming into the box) the uRPF check can be wrong and exclude valid interfaces through which the prefix is valid to be received on. This can lead to incorrect filtering of packets ingressing the router.


Affects release 3.6.1 and beyond
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