Popular discussions about programming, compatibility and testing of optical transceivers.
Homelab, nothing exotic. An Odroid H2 does routing duty on its 2.5GbE ports, and I wanted to hang it off one of the 10GbE SFP+ cages of the switch through an RJ45 copper module instead of pulling fibre across the room. QNAP QSW-M408S, copper module in one of the 10GbE SFP+ cages Odroid H2 router…
Field turn-up work on SDH circuits, and the tester has been fighting me on the optical side lately. Same kit that has been fine for years, so before I book a service call I want a sanity check on the order I should be working through. Viavi T-BERD/MTS-5800 with the SFP port populated, generic…
Intel-branded servers witth a built-in ConnectX-3 (MT27500, ConnectX3-A1-WSP-QDR, firmware 2.36.5000, mlx4en 4.6, kernel 4.19.68) lost link when a QSFP-to-SFP+ adapter with an SFP+ transceiver replaced direct QSFP cabling: ethtool reported Link detected: no and speed Unknown!, port in ETH moe. The…
My firewall is a Supermicro E300-9A running pfSense Plus 22.05, and both 10G SFP+ ports refuse to come up. Neither ix2 nor ix3 ever shows carrier, whatever I put in the cage. Hardware: Supermicro E300-9A, pfSense Plus 22.05 Ubiquiti DAC-SFP10-0.5M and a 10Gtek passive twinax cable Supermicro…
A used IBM Emulex dual-port 10GbE SFP+ PCIe card (bent bracket, loose heatsink) made both TrueNAS Core and a Windows 10 PC hang for a long time during boot; the switch showed a link but neither OS saw the interface as active. Hardware involved: IBM Emulex dual-port 10GbE SFP+, Chelsio NICs, Intel…
I inherited a Sun Network 10GbE Switch 72p with a couple of legacy boxes hanging off it that will never do more than a gigabit. The plan was to drop a 1G capable module into one of the SFP+ cages and be done with it. Sun Network 10GbE Switch 72p, SEFOS CLI over the serial console x2129a dual-rate…
I run a small Proxmox box at home and wanted a proper 10G path to the storage node, so I dropped in a used Supermicro AOC-STGN-i1S. It is the plain Intel 82599 design, board marked E157872, and I assumed this would be the boring part of the build. It is not. Supermicro AOC-STGN-i1S, Intel X520-DA1…
Our inventory tooling walks every switch and records vendor, part number and serial for each pluggable straight out of the SONiC CLI. It works everywhere except one batch of QSFP-DD modules, where the identity fields come back mangled and the asset database fills up with junk. Switch: SONiC…
Small office rack: there is a 40G card in the file server and a switch with spare uplink ports, so instead of buying another box I tried to hang the server straight off the switch. Both ends see the cable, the link never comes up. Huawei S6730-H24X6C, QSFP28 uplink ports QNAP LAN-40G2SF-MLX in the…
Two Flex System enclosures, each with an EN4093R 10Gb Scalable Switch (option 49Y4270) as the network module. Ports come back error-disabled after a chassis power event, and less often drop into the same state while everything is running. It is not always the same ports, which is what makes this so…
The poster wanted to flash four TRW-1310-1.25C-3 and TRW-1550-1.25C-3 SFP modules to work with an HP v1910-24G (JE006A) and asked about a programmer. The difficulty was finding the right firmware and matching serial numbers within one switch while keeping checksums valid. Hardware involved: HP…
Building a storage box at home and picked up a dual 10GbE Solarflare SFN7122F (SFC9120) because it was cheap. The card itself looks healthy, the system sees it and both ports enumerate, but not one of my existing multimode SFP+ modules will bring up a link in it. Solarflare SFN7122F, dual port…
On a CRS226-24G-S2+RM (RouterOS 6.42.11 long-term) the SFP+ port stayed at no link, not running, slave after a power loss, while software reboots were fine; disabling and re-enabling the interface fixed it manually. The problematic module was a Huawei MA5671A GPON SFP, other SFPs behaved, and the…
I run a provider's network with a mixed fleet of modules, so I regularly have to prep modules for specific switches. I want to finally understand the mechanics of the check instead of guessing at dumps. What I'm working with: Cisco Catalyst 2960X-24PS-L, the pickiest one in the fleet QTECH…
We run a handful of 80 km DWDM spans off EX4200s with third-party optics on both ends, because the vendor-branded DWDM parts were never going to fit the budget. That was fine for years. After the EX boxes were moved to Junos 12.3 the optics still sit in the same ports and the spans still exist, but…
