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Cisco Bug: CSCtc29293 - RE:n7k system may experience eigrp neighbor flap or incorrect forwarding

Last Modified

Feb 23, 2018

Products (1)

  • Cisco Nexus 7000 Series Switches

Known Affected Releases

4.2(0.239) 4.2(2)

Description (partial)


n7k system may experience in full mesh redundant topologies intermittent eigrp sia event resulting in neighbor flap or incorrect forwarding for eigrp prefix known as internal and external via two different path.

In first case, trigger is known as link flap to prefix in question or network instability in general. In second case, issue is triggered when the failed link to prefix in question is restored.

The problem may happen with 4.2(1E1), 4.2(2) or 4.2(2a) based images.


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