An M290 with the optional two-port fibre module was fitted; can ports A0 and A1 be used as ordinary interfaces, for example for an ISP fibre handoff, and can a 1 Gb SFP be used in them?
With auto-negotiation off and 10G configured on sfp1/sfp2 of a CCR1036-12G-4S (RouterOS 6.43.8), MikroTik S+DA0001 and Amphenol DACs still run at 1G and the Cisco side shows no link at 10G. Which part of this link should be checked first?
Some Cotsworks SFF fibre modules ship with invalid data in the first EEPROM bytes (physical ID, extended physical ID, connector type) and with checksums programmed before the fields were finalised, so the Linux phy/sfp driveer does not detect them as valid modules. A kernel fixup rewrites the three…
An ODI DFP-34X-2C2 GPON ONU SFP failed to advertise its 2500BASE-X capability because its EEPROM (or virtual EEPROM) did not provide correct speed information to the Linux sfp driver, so the interface did not run at the expected rate. A kernel patch adds a quirk to force the right speed. Hardware…
On a Banana Pi BPI-R4 running OpenWRT 24.10.0 an SFP module failed with kernel logs failed to read EEPROM: -ENXIO and warnings that the module was slow to respond. The internet still worked but the log filled with the error, and the poster was unsure whether it pointed to a faulty stick, a GPON…
A user guide for an SNR SFP/SFP+ reprogramming solution: USB programmer plus Windows/Linux software (FTDI drivers required) supporting SFP and SFP+ per INF-8053, SFF-8472/8431, INF-8077i and INF-8438. The workflow is connect, read the module to display vendor/model/wavelength, load a new firmware…
A USB coding-board product line to reprogram optical transceivers so they match different equipment vendors. Supported form factors span GBIC, SFP, SFP+, SFP28, XFP, QSFP, QSFP28, QSFP-DD plus RJ45, DAC and AOC. The software reads, decodes, edits and writes module memory, ships about 400 well-known…
Replacing an old Dell switch with an Extreme 5420M-24, the same SFP module that had worked in the Dell would not bring the network up: the uplink port was active with rising TX counters but RX stayed at zero, no DHCP address, no ping to the firewall, and a new SFP+ module behaved the same. Ethernet…
A T2600G-28TS (TL-SG3424) uplinked over fibre to another building using D-Link transceivers and media converters showed the SFP port UP and transmitting but never receiving packets. Restart, factory reset and other SFP ports were tried. Another user returned the switch after failing to link it to…
I do industrial installs, mostly Hirschmann switches in cabinets nobody wants to open twice. On the last couple of projects the optics were the line item that hurt: the switches expect Hirschmann-coded modules, and the original M-SFP parts cost several times an equivalent generic module, with lead…
I do small business installs, and this one is a fibre service handed off on an ADVA FSP 150-GE102Pro. The customer wants the WAN terminated on their own router instead of the carrier box, so it has to land in the SFP+ cage of a MikroTik RB4011iGS+. Nobody told me what fibre the service actually…
We are pushing Wi-Fi into an outbuilding on a campus site. The only fibre going that way is a single strand, so the plan was to hang an AP-375 out there and feed it over a BiDi pair we already had on the shelf. Aruba AP-375, ArubaOS 8 Cisco BiDi SFP in the AP cage, its matching partner wavelength…
Installing a new MES2324FB at a site to replace old hardware. The uplink is 1G fiber to an Alcatel 6224, Foxgate modules from the same batch as at neighboring sites. Setup: Eltex MES2324FB, firmware 4.0.4.7, also tried 4.0.6 - no difference 1G SFP Foxgate on both ends of the link far end - Alcatel…
We pick up a 1GE carrier handoff on a Ciena 3930 and I am putting together a spares kit for it. The module quoted for that circuit is XCVR-A10Y31, a 1000BASE-LX/LC part: 1310 nm, 10 km single mode. Nothing exotic about it, and I have a drawer of generic optics with exactly that specification…
I am specifying a fibre ring for a customer's plant network and the switch choice is already fixed: Moxa EDS-518A. The BOM went out with generic 1G optics, because our stock room is full of them, and now the customer's own engineer insists that only Moxa-branded modules may be fitted. switches…
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…
Two SRX1500 sit in separate data centres a few kilometres apart, joined by dark fiber pairs we own end to end. They have to come up as a chassis cluster, which means the control link has to cross that fiber instead of a patch cord inside one rack. The setup: two Juniper SRX1500, identical hardware…
We run a pair of FortiGate 101F units for a 40-person office, nothing exotic. port17 carries an SFP uplink to the core switch, port19 is an RJ45 run to the server room, both of them inside the shared RJ45/SFP block (ports 17-20). In the maintenance window last month we took the pair up to FortiOS…
One physical server on our ERS 8600 talks to nothing, and the switch is quite convinced everything is fine. The port has been in this state since the server was moved from copper to fibre. Avaya ERS 8600, server on a 1G SFP port in slot 3, port 12 server NIC with its own SFP, fibre patch through…
A DS14-MK4 shelf came my way for almost nothing and I would like to hang it off an ordinary tower server as bulk storage at home. It is fully populated with its original carriers, it powers up, fans spin, front panel looks alive - but I cannot get a single disk to appear on the host. NetApp…
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…
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…
Coming from ordinary office switching, so treat this as a beginner question on the industrial side. I am replacing a long copper run between two panels with fiber on a pair of Stratix 5700 switches and I have never used the SFP slots on these. What I have: two Stratix 5700 switches, one per panel…
We had a 200 m OM4 backbone pulled between two buildings a while back and I am trying to light it with kit we already own. Both ends are 2530s, both modules are the HPE part, and the link simply will not come up. 2x Aruba 2530-48G 2x J4858C 1000SX, port 51 on each side roughly 200 m of freshly…
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…
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…
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…
At home I've got Rostelecom fiber with the carrier's ONT installed, and I'd like to get the extra box out of the cabinet: plug an SFP ONU straight into the router and distribute it myself from there. I bought the stick, but I can't get past the first step. Keenetic Giga router, SFP port free Eltex…
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…
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…
