Popular discussions about programming, compatibility and testing of optical transceivers.
Moving my home FTTH line off the operator's ONT and onto a GPON stick in my own router, so that the fibre lands straight in the rack and I keep one box instead of two. The stick is recognised, the port comes up, and then nothing comes back. MikroTik CRS328-24P-4S+, stick in sfp-sfpplus1…
I run a backup storage system in a data center. A pair of DD9900 in HA, network ports on the NDC QLogic. After a reboot or reseating the module, port ethMa stops seeing the transceiver, and it's not a one-off - it's a stable, repeating pattern. Dell DD9900, DD OS 7.2.0.95, HA configuration NDC…
We poll a mixed fleet of ZTE ZXA10 OLTs from LibreNMS and two things are wrong. I suspect they are unrelated, but I am not sure. ZTE ZXA10 C300 on V2.1.0, still in service in an old POP ZTE ZXA10 C620 on V2.0.30, plus a C650 and a C650E one ZTE ZXA10 C320 that used to behave SFP and SFP+ uplinks…
Small home rack, one server and one switch. I replaced an XGS1250-12 with an XS1930-10 and the only thing that did not survive the swap is the server uplink. Zyxel XS1930-10, SFP+ port with media type set to DAC10G Asus XG-C100F in the server 10Gtek CAB-10GSFP-P5M, 5 m passive twinax, AWG26 a…
We pulled a pair of G8124E out of a decommissioned rack and I am rebuilding them as the aggregation layer for an internal test environment. Budget for branded optics is zero, so everything goes in with generic 10G SR modules of the type we already run elsewhere. Lenovo RackSwitch G8124E, ex-IBM…
My fibre WAN runs into a Turris Omnia and I moved from the ISP box to an XPON stick to drop one hop. The stick is a 2.5G part, the Omnia cage does 2.5G, and everything still lands at 1G. Turris Omnia, Turris OS 7.0.2 HBS, kernel 5.15.148 Luleey LL-XS2510 XPON SFP, RTL960x based, DFP-34X-2C2 family…
On an inexpensive firewall appliance (Intel Atom C3758R, six 1GbE igc ports and two SFP+ cages wired to the CPU) OPNsense showed four ix interfaces instead of two and the SFP+ ports stayed red/down with a copper SFP+ RJ45 module, although the link LEDs lit. ifconfig -v identified ix0/ix1 as the…
Small home lab. I flashed a Linksys LGS328C over to OpenWrt SNAPSHOT to get away from the stock web interface. Everything survived the move except one SFP28 port that used to work perfectly well. switch: Linksys LGS328C (Realtek rtl930x), OpenWrt SNAPSHOT module: Dell S28-10G-25G-SR-85C, dual-rate…
Setting up 10G between a server and a TP-Link switch, nothing exotic. The card shows up in the system, driver loads normally, but there's no link on the port at all - no errors, no negotiation attempts. server: Intel X710, four 10GbE SFP+ ports, firmware 9.140.76856 TP-Link switch, SFP+ port cable…
Commissioning a 10G handoff for a customer on a 3930 that was already on site. The module is Ciena's own, pulled from our stock, and the port does come up - but the operational state is UCTF instead of Ena and the uncertified transceiver alarm sits there permanently. The acceptance test includes a…
Running a small virtualization setup: two Proxmox 6 nodes and a target on FreeNAS 11.2. While the HBAs were connected to the target directly, everything ran for months without a single error. Put a used Brocade 200e between them to avoid crossing cables, and that's when it started. two Proxmox 6…
Second hand HPE 5130 for the rack at home, and it arrived with four HPE JD092B X130 10G SFP+ SR modules in the box. I bought new OM4 LC patch cords, wired one SFP+ port to the 10G card in the server, and got absolutely nothing. HPE FlexNetwork 5130 24G PoE+ 4SFP+ EI (JG936A) 4x HPE JD092B X130 10G…
A Raspberry Pi tool for SFP/SFP+ EEPROM: -r prints connector, transceiver spec, wavelength, vendor, part, serial, date and checksums; -d dumps the whole EEPROM; -c recaculates checksums and offers to write the correct value; -m reads DOM sensors (temperature, voltage, bias, power). A vendor variant…
I am wiring per-port optical telemetry into monitoring for a couple of Nexus 9000 fabrics. Collection runs through NAPALM, and the getter I lean on is getoptics(). Nexus 9000 leaf and spine pairs QSFP-100G-CWDM4 modules on the fabric links NAPALM with the nxosssh driver, SSH transport, no NX-API…
We run a small regional network and pulled a spare 7050T out of stock to use as a DWDM aggregation box. Arista-coded DWDM optics for it quote close to the price of the switch, so we bought third-party DWDM SFP+ instead, and now the switch will not talk to them. Arista 7050T, EOS 4.10.6 generic…
