txhub

Germany joined 9 months ago 2 questions 4 comments

Network engineer from Hamburg. Mostly Arista and Mellanox.

Questions

4votes

1 answer

26views

Lenovo ThinkSystem NE1032 shows third-party SFP+ as Unapproved and holds the ports down

We run a pair of ThinkSystem NE1032 RackSwitch units as top of rack in a small colo cage. The Lenovo-branded optics we inherited only cover half the ports, so the rest got filled with generic SFP+ modules and a couple of short DACs out of the same batch we already use on other vendors' switches…

txhub DE asked 17 days ago

4votes

1 answer

43views

ConnectX-4 MCX456A-ECAT will not link to a Cisco NCS on 100GBASE-LR4 while loopback passes on both ends

We run a pair of racks that hand off to a carrier-facing Cisco NCS, and one of the 100G server uplinks has never come up since the build. Same result after moving the server to another cabinet with a different patch panel, so I have stopped treating it as a one-off. Supermicro server…

Cisco connectx-4 fiber-cleaning loopback QSFP28

txhub DE asked 19 days ago