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Cisco Bug: CSCvt97063 - NFNIC - UCS System QOS changes may cause extended FC Connectivity issues

Last Modified

Oct 19, 2020

Products (1)

  • Cisco Unified Computing System

Known Affected Releases

4.0(4g)A

Description (partial)

Symptom:
Immediately after System QoS changes, including enable/disable of non default classes following symptoms can be observed:

Significant Abort errors can be seen on host and VIC syslog 
ICMP/Ping loss to VM's is observed, but ESXi host doesn't experience ICMP/ping issue

Conditions:
Issue has been observed on UCS servers connected to 6200 Fabric Interconnects with ESXi hosts using Native FNIC driver (NFNIC)

Engineering analysis also indicates underlying occur can occur on other Fabric Interconnect types, such as 6332-16UP
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