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Cisco Bug: CSCvt79015 - Port-channel load balancing issue when PBR load-share in use

Last Modified

Jul 20, 2020

Products (67)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 3636C-R Switch
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 93600CD-GX Switch
  • Cisco Nexus 92348GC-X Switch
  • Cisco Nexus 92304QC Switch
  • Cisco Nexus 3132Q-V Switch
  • Cisco Nexus 9396PX Switch
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Known Affected Releases

7.0(3)I7(7) 9.3(3)

Description (partial)

Symptom:
The issue is specific to N9K-C93180YC-EX devices only;

When PBR sets several next-hops with "load-share" keyword, and in case the traffic has to be sent out (load-shared) over several port-channel interfaces further, an issue might be observed with load-balancing of the traffic over the physical member interfaces on these port-channel interfaces.

Conditions:
The issue is specific to N9K-C93180YC-EX devices only.
The issue is not seen on -FX series devices (like N9K-C93180YC-FX).

PBR has to set several next-hops for the matched traffic with "load-share" keyword enabled.
The matched traffic has to be sent out further ("load-shared") over port-channel interfaces.
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Bug Details Include

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