Popular discussions about programming, compatibility and testing of optical transceivers.
A 2920-48G-PoE+ (J9729A) rejected a J9283B 3 m SFP+ DAC with 00536 FFI: port 45 Transceiver type not supported in this port even though HP lists the cable as compatible; the same cable worked in a 2530 with SFP+ slots. Firmware had been updated without effect. A later reader noticed an old J9283B…
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…
The poster has a stack of two Cisco Catalyst 3850-48T switches, each fitted with a 2x1G/2x10G fiber uplink network module. Two 10G fiber links already run in slots 2/1/3 and 2/1/4. When a single-mode 1G SFP is inserted into 1G slot 2/1/1, the switch reports the module as unsupported and places the…
Small office, one Firebox M470 on the perimeter, and I wanted to move the link to the core switch off copper and onto the built-in SFP+ ports. Bought a pair of generic SFP+ modules for it, one for each end. The switch side lights up straight away, the Firebox side never does. Kit: WatchGuard…
We run a three-node cluster with the nodes cabled directly to each other over 100G DAC, no switch in the path, and the interfaces put into a broadcast bond so replication traffic has its own fabric. Before I put real load on it I wanted a baseline, and the numbers do not agree with each other. 3x…
On an HPE 5510 24G SFP 4SFP+ HI (JH149A, Comware 7.1.045 R1111P01) genuien JD119B and JD118B 1G SFPs were accepted at first (OPTMOD/4/MODULEIN: The transceiver is 1000BASESXSFP), but after a cold power reboot the same modules were reported as UNKNOWNSFPPLUS with OPTMOD/5/CHKSUMERR: Transceiver…
The poster, validating their product against Cisco Nexus 9000 switches (a Nexus C9332D-GX2B chassis), is blocked by bug CSCwo18785: configuring 200G on a QSFP-200G DAC fails with 'ERROR: The transceiver doesn't support this speed'. The cable is a Mellanox MCP1650-H002E26 200GbE DAC; connected…
A MikroTik CCR1036-8G-2S+ with S-31DLC20D 1.25G single-mode SFPs reported link OK but no traffic flowed; TX power was blank and RX was -9 dBm. The identical module on the same fibre worked in a CCR1036-12G-4S. Port disable/enable, forcing 1G full duplex on both ends and support tickets did not…
The poster had third-party SFP+ optics for both the on-board Intel X553 ports of a Netgate XG-7100 and an add-in X520-DA2 and had found that hw.ixgbe.unsupportedsfp=1 in /boot/loader.conf enables them. Questions: does it apply to both on-board and PCIe Intel ports, what is the difference between…
A pfSense router on a Supermicro R210 II with an AOC-STGN-i2S (82599-based X520 clone) was connected throguh an FS.com SFP+-to-RJ45 module to a cable modem with a 2.5 Gbps port. No link negotiation happened; pfSense offered only auto and 10G speeds and never 2.5G. Hardware involved: Supermicro…
Two Cisco Catalyst 3750-X switches (WS-C3750X-24P-L and WS-C3750X-48P-L) run identical code. A Cisco GLC-SX-MMD is detected normlly in Gi1/1/1 of the first switch, but the second switch reports 'media type is Not Present' with 'link type is force-up' on Gi1/1/1, and 'show idprom interface Gi 1/1/1'…
Replacing the ISP ONU with a Baudcom DB-1234-SFM GPON SFP stick in a hEX S: the stick registered with the OLT and obtained an IP with the spoofed MAC, but with sfp1 as WAN pings returned network unreachable, although the same configuration on ether1 (behind the ISP ONU) worked and Winbox showed no…
Two FS.com 1G BiDi SFPs (1490/1310 and 1310/1490 nm) in a MikroTik CRS326-24G-2S+ running SwOS 2.9 detected incoming light around -6 dBm but never established a link; the same optics linked on a Netgear switch. The poster asked whether a manual speed setting was needed and whether RouterOS would…
The thread starter had a set of Cisco EEPROM images (SX, LH, ZX types) but no CWDM images and wanted CWDM SFP modules to show up on Cisco switches as CWDM/WDM optics rather than being misidentified as SX or LX. Without a correct image the switch either reported the module as unsupported or forced…
On Huawei switches with 25GE ports the poster asked about using SFP+ transceivers and copper cables; per the troubleshooting docs, when a non-1 m copper cable is connected to a 25GE interface the RS-FEC function must be enabled or the interface goes Down, and mixing different optical modulles at…
We are building out two racks and the switching is settled: a pair of M4500-48XF8C as the leaves with M4350 underneath. What is not settled is the optics BOM. NETGEAR does not put its own label on 25G or 100G modules, and I would rather not discover after delivery that the SFP28 ports dislike what…
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…
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…
The poster's newly acquired Cisco Catalyst 9300 (with an 8-port 10G SFP+ network module) would not link to a Cisco Catalyst 4503-E tat only has 1G SFP ports. Suspecting a 10G-versus-1G speed mismatch, the poster tried to force the 9300's 10G SFP to operate at 1G with the 'speed' command, but the…
For a deployment on Dell PowerEdge R630 and C4140 servers the poster had Intel X520-SR2 adapters (E10G42BFSR) fitted with the bundled Intel FTLX8571D3BCV-I3 10GBASE-SR SFP+ modules (850 nm, 300 m multimode). The uplink switch is a Huawei Quidway 9300 whose SFP+ ports carry 10GBASE-LR (1310 nm)…
We are refreshing the core of a small office and put in a pair of Aruba CX 6200F. The link between the two switches is meant to be a 10G trunk on the SFP+ uplinks, and I cannot get either box to admit that 10G exists on that port. 2x Aruba CX 6200F Switch Series, trunk on port 1/1/25 Cisco…
We recode a small batch of modules for customer hosts most months, nothing exotic: read the original page, write the vendor string the host wants, put the module in the switch and move on. One module out of the current batch refuses every write while reading back perfectly, and before I bin it I…
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…
An Aruba/HPE 2530-48G-2SFP+ on firmware 16.01.0012 logged Port contains a transceiver not made by Hewlett Packard Enterprise with the advice to use onlly genuine transceivers, and refused the modules; ironically one of the rejected transceivers was HP-branded. The poster asked whether a command…
A MikroTik CSS610-8P-2S+ (SwOS Lite) needed to connect its SFP+ ports to a Cisco Nexus 5596UP. The ports showed the transceivers in the web UI but no link, after trying several fibre cables and transceivers. The switch web UI listed vendor and type for each module, yet the port stayed at no-link…
On an Intel S2600WFT board the X722 10GbE SFP+ controller (rev 09, NVM 3.31 0x80000d31 1.1767.0) refused ethtool -m with Cannot get module EEPROM information: Invalid argument, and the kernel logged Module EEPROM memory read not supported. Please update the NVM image. The behaviour was identical…
Four HP ProCurve 6120XG blade switches (516733-B21) refused J9150A 10G SR SFP+ transceivers that the datasheet lists as supported; show tech transceivers reported them as unsupported. The switches ran Z.14.56. The poster asked whether a firmware upgrade or a configuration setting was needed…
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…
We took over a pair of ZS3-2 controllers together with the shelves behind them, and I am the one who has to order optics before they go back into service. The controller service manual is very short on this point: it lists the NIC and HBA options, and for the 10GbE SFP+ card it names exactly two…
SFP+ DACs linked MikroTik-to-MikroTik and OLT-to-OLT, but between a V-SOL EPON OLT 16008D and a CCR2004-1G-12S+2XS or CRS326-24G-2S+RM the OLT reported the interface as disconnected. The same DACs were recognised on both platforms, so the poster suspected a cross-vendor auto-negotiation or…
