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…
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…
I swapped the ISP ONU for an ODI DFP-34X-2C2 GPON stick in my Turris Omnia so the fibre terminates in the router instead of another box on the shelf. That part worked: the line is registered, traffic flows, no complaints. The problem is the rate. It never goes above 1Gbps, and 2.5G was the whole…
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…
Running a CWDM ring at the access layer, Catalyst 3750 at aggregation. I got plain modules with no vendor encoding, case marking TTG965D1, 1470-1610 nm grid. The link comes up, traffic flows, but the switch treats them as SX modules: in both inventory and monitoring it shows SX instead of CWDM, so…
I run a small ISP's network and regularly reflash cheap modules for HP. Usual task: flash the vendor module's image into cheap Chinese 1.25G WDM modules so the switch accepts them without complaint. Donor is a J4859C, target hardware is an HP 2530-24G J9776A. What's on the bench: HP 2530-24G J9776A…
We are bringing up a pair of AS9716-32D as a 400G spine in the lab, on a community SONiC image with the PDDF platform layer. The optics are not the problem, the peer links fine, but everything the switch says about them is wrong. Edgecore AS9716-32D (x8664-acctonas971632d-r0) community SONiC build…
I keep a shelf of pulled SFPs at home and I would like to be able to read their EEPROM, repair a module whose checksum got mangled, and occasionally recode one for a switch that is picky about vendor strings. Buying a commercial programmer for a handful of modules a year makes no sense here, so I…
The poster operated old HP/H3C A5800 switches (JC100A, JC103A) with many SFP modules of mixed coding. Modules with H3C in A0h bytes 60h-62h worked but logged This is not a supported transceiver for this platform, and DDM plus serial/date information were unavailable. Copying the full data from a…
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…
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…
I keep a small pool of shared modules: the nodes are scattered around the city, and I have to recode SFP modules for almost every switch that isn't mine. With gigabit modules the routine has been solid for a long time, but a 10G one just stopped me cold. What's on the bench: a programmer with an…
I am replacing the operator ONT with an SFP GPON stick on the Linux box that terminates our WAN, and the stick behaves nothing like a transceiver. Push it in and the cage stays silent for half a minute or more, long enough that I twice assumed the module was dead, and when the kernel finaally does…
We look after the switch management firmware on our own hardware, and ever since the SP/FPGA interface was changed from memory mapped buffers to a FIFO, the transceiver inventory has been coming back as junk on some ports. QSFP28 optics, all of them AFBR-89BDDZ out of the same batch reads go over…
On a Juniper EX4600 running Junos 14.1X53-D27.3 the poster inserted a non-certifiied 1G single-mode WDM (BiDi) SFP, 20 km, TX 1550 / RX 1310 nm with DDM, into ge-0/0/1. The interface never appeared: show interfaces returned error: device ge-0/0/1 not found, and the log recorded XCVR: Unit 1, Fibre…
