Nexus 93180YC-EX 25G SFP28 DAC और optics detect करता है पर link कभी up नहीं होता

Poster, जो एक Cisco Nexus 93180YC-EX (NX-OS 7.0(3)I4(7) पर चलता) का नया owner है, कोई भी 25G link up नहीं कर पा रहा। ipolex SFP28 DAC cables recognize हो जाते हैं ('type is SFP-H25GB-CU1M', 'name is OEM', 'part number is SFP-H25G-CU1M', 'nominal bitrate is 25500 MBit/sec', 'DOM is not supported') पर port 'service unsupported-transceiver' के बाद भी down रहता है। patch cable पर optics test करने पर असymmetric results मिले: server में 25G SFP और switch में 10G SFP 10G पर link करते हैं, पर server में 10G SFP और switch में CISCO-FINISAR SFP-25G-SR-S (type SFP-H25GB-SR10M, part AZS85-S28-M1/GR, cisco part number 10-3227-01) कभी link नहीं करते, हालांकि 'show interface transceiver detail' healthy DOM values दिखाता है (Tx 1.19 dBm, Rx 0.56 dBm, Transmit Fault Count = 0)। Eth1/30 और Eth1/31 identically configured हैं।

• Hardware: Cisco Nexus 93180YC-EX
• Transceivers: ipolex 25G SFP28 DAC (reported as SFP-H25GB-CU1M / SFP-H25G-CU1M), SFP-25G-SR-S (CISCO-FINISAR AZS85-S28-M1/GR), unspecified 10G SFP+
• Form factor: SFP28, DAC, SFP+

Symptoms / messages:

link down with 25G SFP28 DAC recognized as SFP-H25GB-CU1M
DOM is not supported
service unsupported-transceiver has no effect
10G SFP+ to SFP-25G-SR-S optical link stays down
link up at 10G only with the 10G module in the switch