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Cisco Bug: CSCuq35539 - DMVPN EIGRP Hub suppresses poison update to spoke, stale topology

Last Modified

Nov 27, 2020

Products (2)

  • Cisco 2600 Series Multiservice Platforms
  • Cisco 2600 Series Multiservice Platforms

Known Affected Releases


Description (partial)

A stale EIGRP Topology table entry and routing table entry exists on a DMVPN spoke router [Spoke B] after the tunnel interface goes down on another spoke router [Spoke A].  The stale routing entries on Spoke B are advertised into EIGRP by redistribution on Spoke A.  The HUB router correctly removes the entries but does not properly update Spoke B about the EIGRP topology change.

Observed in a DMVPN configuration where the HUB router is configured with EIGRP manual summarization, using a leak-map to allow specific routes to be advertised from the summary.  The affected routes are covered by this EIGRP summary and allowed in the leak-map.
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