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Cisco Bug: CSCvs07245 - N9K-C93180YC-FX version:14.2(2e) SFP-H25GB-CU5M 25GG Link down toward Catalyst9500

Last Modified

Nov 21, 2019

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

14.2(2e)

Description (partial)

Symptom:
25Gig links not coming up between ACI Leaf and Catalyst 9500 using SFP 'SFP-H25GB-CU5M

<pre>
Leaf switch Hardware/Software
N9K-C93180YC-FX
14.2(2e)
SFP: SFP-H25GB-CU5M

Catalyst 9500 switch Hardware/Software
Model Number: cisco C9500-48Y4C
Software Version: Cisco IOS XE Software, Version 16.12.01c
</pre>

Conditions:
[+] May be there are other model of leaf affected but we found issue between N9K-C93180YC-FX & C9500-48Y4C
[+] 25GB connection using SFP-H25GB-CU5M twinx cable
[+] port is configured both side with FC-FEC (or without FEC config)
[+] Switchport auto negotiate turned ON in Catalyst 9500
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