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Cisco Bug: CSCum90179 - N6K: Fabricpath ECMP issue with packet forwarding

Last Modified

Feb 22, 2018

Products (7)

  • Cisco Nexus 6000 Series Switches
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 6004 Switch
  • Cisco Nexus 6001 Switch
  • Cisco Nexus 5548UP Switch
  • Cisco Nexus 5596T Switch

Known Affected Releases

6.0(2)N2(1) 6.0(2)N2(2) 7.0(1)N1(0.103)

Description (partial)

When we have multiple path for FabricPath forwarding, one of them become unavailable after a certain operation.

This issue happens when recalculation for FabricPath ECMP route occurred.
 - when a best path gets down and multiple backup routes are selected as new (ECMP) best paths
 - when one of two ECMP best paths gets down and bring back to online and FP gets multiple best paths again.
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