Popular discussions about programming, compatibility and testing of optical transceivers.
A TP-Link T1700G-28TQ (V3, firmware 3.0.0) with a TL-SM311LM module was linked to a Netgear ProSafe GS716T with a SkyLane SFP85P55GE0B989 module. The TP-Link port showed 1000M with a flashing LED while the Netgear port stayed down, and throughput was about 1 Mbps; with a media converter the link…
On an IOS XR router (RSP-based ASR 9000 class, observed on IOS XR 4.x and 5.x), the poster configured a tunable DWDM XFP with 'controller dwdm 0/1/0/0', 'admin-state maintenance', 'wavelength 55', 'admin-state in-service' and then brought the TenGigE interface up. The running configuration shows…
A Python library to create, read and modify the 256-byte A0h page of SFP EEPROM per SFF-8472. It exposes named fields (vendor, part, serial, wavelength, bit rate, encoding, link lengths, diagnostics options), generates images from scratch or from a binary, and validates/recalculates checkssums. It…
A DGX Spark with a ConnectX-7 NIC was connected to an existing 10G SFP+ optical network through an inexpensive QSFP-to-SFP+ adapter bought on AliExpress; neither DACs nor standard optical modules produced any link. The poster asked whether the setup could work at all and how to configure it…
The poster needed to connect stacked Aruba 6300F (JL665A) switches to a 6300M core (JL658A) at 10 Gbps over more than 3 m. J9283D 3 m DACs worked for short runs and the older 3810/2930 platforms supported a 7 m J9285D cable, but that cable is not listed for the 6300. The question was whether the 5…
The poster owned a MikroTik RB962UiGS-5HacT2HnT (hAP ac) with a single SFP cage and had two spare 850 nm modules on hand: a Cisco-branded AFBR-57F5PZ-CS1 and an Intel-branded FTLX8571D3BCVIT1. The ISP delivered the service over a single fibre strand rather than a duplex pair, and the posster wanted…
We keep a couple of ONIE boxes in the lab rack for testing, and one of them is an Edgecore AS5114-48X-O-AC-F-EC running dentOS. Port 18 is supposed to carry a 10G link to a neighbouring switch and it simply refuses to cmoe up, even though the platform clearly sees the module. Switch: Edgecore…
The poster was building a server that needed a 1 Gbps single-mode fibre uplink and wanted a PCIe card with two to four SFP cages so any optic could be used later. The core doubt: switches usually accept plain 1G SFP optics in SFP+ ports, but is the same true for 10GbE server NICs, or would the NIC…
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…
An operator asked how to use non-Intel SFP+ modules for 10G fibrre on Intel adapters under Linux. The replies summarised the practical rules: for 82599/X520 class NICs the ixgbe module parameter allowunsupportedsfp must be set, and on dual-port cards it must be given per port…
After upgrading a CRS309-1G-8S+IN from RouterOS 6.48.6 to 7.14.1 (and 7.15beta8), ports 5 and 7 with 10Gtek ASF-GE-T (FTRJ8519P1BNL-PT) copper SFPs showed sfp-rx-loss: yes and no-link when auto-negotiation was enabled; disabling auto-negotiation and forcing 1G full duplex restored the link…
The poster bought a Cisco SFP-10G-SR on eBay (markings suggesting 2007 manufacture) and, warned about counterfeit Cisco optics with longevity and safety risks, asked how to tell whether it was genuine before deploying it. Hardware involved: Cisco SFP-10G-SR. Reported symptoms/messages: authenticity…
The poster connected a Dell server to a Cisco Catalyst C9500-48Y4C (IOS XE 17.9.3) using a Dell L56SF018-SD-R 3 m DAC (DAC-SFP-3M). The cable is not in Cisco's optics compatibility matrix, and 'show interface status' shows port TwentyFiveGigE1/0/35 as err-disabled. Logging shows…
Several pairs of 3COM 2928 switches (JE007A-like, HP 1910-24G family) were linked over J9281B SFP+ DACs. After upgrading from 5.20 1108P01 to 5.20 1519P03 the links no longer came up. Before the update display transceiver interface showed STACKSFP / Tyco Electronics and simple LINK UPDOWN events…
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…
