A site decommission left me with a drawer of pulled Cisco optics, a mix of GBICs, 1G SFPs and 10G SFP+, and I have to decide which of them go back into production and which go in the bin. The GBICs I have put aside for now, since nothing on the bench takes them, so everything below is about the SFP…
I look after the access layer at a small ISP and I want our two GPON OLTs to show up in monitoring the same way everything else does. The wish list is not exotic: how hot the chassis runs, CPU and RAM load, counters per port, and the part I actually caare about, the optical side. That means Rx/Tx…
I look after a mixed Zyxel estate on one site and I am putting together a vrey basic optical health check for the fibre uplinks: temperature and Rx power per port, so I can see a link degrading before the users report it. What is involved: Zyxel GS1910, older access switch with SFP uplinks Zyxel…
We hand customer circuits off on MRV OptiSwitch demarcation boxes - mostly OS906, with a few OS904 and OS912 left on older builds. When a ticket comes in about a circuit that is down or flapping, I want two things over SSH before anyone drives out: what module is actually sitting in the port…
I run a ZTE ZXA10 C320 at a site, 10G uplink. I check levels and status by hand from the console, but I'd like to bring it all into monitoring so I don't have to jump into the CLI for every subscriber complaint. OLT: ZTE ZXA10 C320 uplink: SFP+ in xgei1/21/1 subscribers on gpon-onu1/1/1:1 and…
We poll a handful of Nokia 7705 aggregation routers in LibreNMS and I wanted optical DOM off them for the usual reason - catching a span going soft before the customer notices. Discovery never finishes on those devices. Nokia 7705 running TiMOS LibreNMS 26.3.1 Ordinary single-lane 1G SFPs in the…
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 hand over industrial cabinets with the customer's own monitoring on top, so readable DDMI on the uplink ports is part of the acceptance list. On an RGS200-12P the two ports that matter refuse to print anything at all after DDMI is enabled, even though both links are up and forwarding. Zyxel…
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…
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…
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…
A link between two of our sites: about 27 km of single-mode fiber, MES3324F on both ends. Installed a pair of 1550 nm FANG HANG SFPs sold as 40-km modules. The link comes up, lives for a few dozen seconds, and drops, over and over, until the port gets blocked. 2 x Eltex MES3324F, firmware 4.0.7 SFP…
We are reusing a pile of 10G optics on a whitebox switch running SONiC, so a few QSFP28 cages are fitted with QSA-style adapters (10GTek QSA-100A) carrying plain 10G SFP+ modules. Mechanically and electrically this is fine. The management side is where it falls apart. switch: 1U whitebox, SONiC…
We took over a small aggregation site and one of the 10G uplinks has not come up since the module in it was swapped. The module is listed as incompatible with the CRS226, so that is where suspicion landed first, but the readings do not look like a rejected module to me. MikroTik CRS226 at the…
I am writing a small poller that pulls temperature, voltage, bias and optical power straight off the modules on our whitebox boxes, so we get a trend line instead of someone eyeballing a link after it has already started erroring. The NOS prints pretty values, but I want the raw numbers with the…
