Nexus 93180YC-EX mendeteksi DAC SFP28 25G dan optik tapi link-nya tidak pernah naik

Penanya, pemilik baru Cisco Nexus 93180YC-EX yang menjalankan NX-OS 7.0(3)I4(7), tidak bisa menaikkan link 25G sama sekali. Kabel DAC SFP28 ipolex dikenali ('type is SFP-H25GB-CU1M', 'name is OEM', 'part number is SFP-H25G-CU1M', 'nominal bitrate is 25500 MBit/sec', 'DOM is not supported') tapi port-nya tetap down bahkan setelah 'service unsupported-transceiver'. Nge-tes optik lewat patch cable kasih hasil asimetris: SFP 25G di server dan SFP 10G di switch link di 10G, tapi SFP 10G di server dan CISCO-FINISAR SFP-25G-SR-S (type SFP-H25GB-SR10M, part AZS85-S28-M1/GR, cisco part number 10-3227-01) di switch tidak pernah link, meskipun 'show interface transceiver detail' menunjukkan nilai DOM yang sehat (Tx 1.19 dBm, Rx 0.56 dBm, Transmit Fault Count = 0). Eth1/30 dan Eth1/31 dikonfigurasi identik.

• Hardware: Cisco Nexus 93180YC-EX
• Transceiver: DAC SFP28 25G ipolex (dilaporkan sebagai SFP-H25GB-CU1M / SFP-H25G-CU1M), SFP-25G-SR-S (CISCO-FINISAR AZS85-S28-M1/GR), SFP+ 10G tidak disebutkan
• Form factor: SFP28, DAC, SFP+

Gejala / pesan:

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