Latest questions from the community.
Small tower site: an RB4011 in a ventilated roadside cabinet feeding a couple of radios, with one 10GBASE-T copper hop over to the switch because there was already cable in the duct. The port drops out on warm afternoons and comes back at night, which points fairly clearly at the module rather than…
After upgrading to Proxmox VE 8 with the 6.x kernel, on-board Intel X553 SFP+ ports that worked on kernel 5.15.108 showed NO-CARRIER even with the cable and module connected. The regression was traced to an upstream ixgbe commit (565736048bd5) that broke auto-negotiation handling for X550/X553…
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…
On Proxmox VE 6.0 (kernel 5.0.18-1-pve, ixgbe 5.1.0-k) an Intel X520-DA2 exposed ens1f0/ens1f1 but any inserted thirrd-party SFP+ module produced failed to load because an unsupported SFP+ or QSFP module type was detected, and the driver had to be reloaded to detect module changes at all. Hardware…
A Dell R720 with the integrated i350/X520 daughter card ran Proxmox VE; Cisco-branded 10G multimode LC SFP+ modules that worked elsewhere were rejected as unsupported. Adding options ixgbe allowunsupportedsfp=1 to the module options had no visible effect. Respondents walked through GRUB kernel…
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…
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…
On an HP 5820-24XG-SFP+ (JC102A) the ports cabled with genuine HP X240 10G SFP+ 3 m DACs (JD097C) came up but logged OPTMOD/4/FIBERSFPMODULENOWINVALID: This is not a supported transceiver for this platform, and broadcast/multicast counters on those ports grew faster than normal. The cable is lisetd…
On a Minisforum MS-01 running Proxmox (i40e, kernel 6.8.12-10-pve) the X710 SFP+ port enp2s0f0np0 recogniesd a Ubiquiti SFP+-to-RJ45 module (ethtool listed 10G Base-SR capability) but the link never came up: Link detected: no, interface DOWN, no dmesg errors, ip link set up made no difference…
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 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…
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 are adding a G610 to an existing fabric and there is a box of non-Brocade 16G/32G FC SFP+ left over from another build. Before I plan any ports around them I put one into a spare port on the bench to see what the switch makes of it. Brocade G610, Gen 6 third-party 32G FC SFP+, no Brocade…
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…
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 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…
We run a small regional network and pulled a spare 7050T out of stock to use as a DWDM aggregation box. Arista-coded DWDM optics for it quote close to the price of the switch, so we bought third-party DWDM SFP+ instead, and now the switch will not talk to them. Arista 7050T, EOS 4.10.6 generic…
On an Aruba 1930 (JL685A, software 2.6.0) two D-NET DN-SFP-LX modules in SFP+ ports 49 and 50 actually carried traffic, yet the web dashboard showed both ports as DOWN and, without a CLI, the poster could not check whether the modules were identified. The question was whether this was a bug, an…
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…
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…
The poster configured new HP 2530-48G switches (J9281B) with J9775A SFP+ direct-attach cables bought as accessories. The ports stayed down and the log said FFI: port 49 Transceiver type not supported in this port; show tech transceivers first showed nothing and, afer upgrading from YA.15.12.0007 to…
I picked up a couple of second-hand Arista switches for the lab and ran straight into the optics gate. Arista-coded modules link up, passive DAC cables link up, and anything third-party leaves the port down. The lab side: DCS-7150S-24, bought used, no support contract and no account team behind me…
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 push traffic from a lab server into a CRS518-16XS-2XQ over a 100G QSFP28 uplink, and it leaves the switch through a MikroTik S+RJ10 copper SFP+ into a plain 1G RJ45 host. The receiving side is missing a large share of the packets and I cannot pin it on anything obvious. Setup: MikroTik…
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…
On an HP 5120-EI the poster inserted an Allied Telesis AT-SPEX 1310 nm SFP and got a PHONY ENTITY trap plus OPTMOD/4/FIBERSFPMODULENOWINVALID: This is not a supported transceiver for this platform; the port never came up. The poster looked for a command to disable enforcement of SFP coding. Later…
Homelab, nothing exotic. An Odroid H2 does routing duty on its 2.5GbE ports, and I wanted to hang it off one of the 10GbE SFP+ cages of the switch through an RJ45 copper module instead of pulling fibre across the room. QNAP QSW-M408S, copper module in one of the 10GbE SFP+ cages Odroid H2 router…
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…
Small office, two buildings, and all I want is a plaain 1000M fibre link between the racks. Both ends are configured for 1000M, both stay dark, and this has been dragging on for weeks now. TP-Link TL-SG3452P, hardware V3, firmware 3.20.4, link taken from one of its SFP cages PLANET IGS-6329-8UP2S4…
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…
We are collapsing two aggregation rows onto FortiSwitch, and the last piece is a 25G interconnect between an FS2048 and an FS648 in adjacent racks. Everything else in the design came up on the first attempt; this one link refuses to. FortiSwitch 2048, 25G front-panel port FortiSwitch 648, 25G…
Joining two campus buildings into one network. In building A there's an Avaya VSP 4400, and only 1G SFP ports are free there: the dedicated uplinks have long been taken for other purposes. In building B there's an Extreme Summit X690-48x-2q-4c, and there only 10G SFP+ ports are free, no other…
We are bringing up a pair of 8360-32Y4C as leaves and the downlink plan is deliberately mixed: mostly 25G to servers, a couple of 50G ports to a compute chassis, and a few slow copper drops for out-of-band gear. Because the SFP56 downlinks are grouped and the speed is set per group, I want to…
Small vSphere cluster, two 10G uplinks per host into a pair of top-of-rack switches. After the ToR was rebooted for a firmware update, part of the VMs on one host went silent and vMotion failed on both uplinks - yet ESXi never marked anything down and the adapter LEDs stayed lit the whole time…
An HP 5900AF-48XG-4QSFP+ (Comware 7.1.045 R2311P01) logged OPTMOD/4/PHONYMODULE: This is not a supported transceiver for this platform for two 10G SR SFP+ modules; display transceiver interface identified them as Avago and JDSU 10GBASESRSFP with DDM. The poster wanted to know which SFP+ to buy and…
The poster asked whether third-party optics can be used in an HPE FlexFabric 5700 40XG 2QSFP+ (JG896A) and whether the ProVision command allow-unsupported-transceiver exists on it. The answer clarified how Comware differs from ProVision: there is no allow-list of supported transceivers, so unlisted…
Four HP A5500-HI switches in an IRF stack logged unsupported transceiver messages for six rear-module (JD368B) ports that were cabled with HP J9281B SFP+ DACs to ProLiant Gen8 servers with 530SFP+ NICs. display transceiver interface shwed Transceiver Type STACKSFPPLUS, Connector COPPER, Vendor Name…
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 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…
Across about forty ProCurve/Aruba switches the poster had used J4858C and J4858D 1G SX SFPs without issues, but eight newly purchased J4858D units logged Unsupported Transceiver on 2530-8G (J9774A, YA.15.16.0006), 2530-8G (J9777A, YA.15.12.0007) and 2530-24G (J9776A, YA.15.10.0003). show tech…
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…
A FlexFabric 5900AF running Comware 7.1.035 R2208P01 reported a third-party transceiver as not supported when inserted, while the same class of modules worked in a FlexFabric 7904 on 7.1.045. The poster asked whether support could be enabled by command and whether the Comware versin mattered…
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…
Small home rack, one server and one switch. I replaced an XGS1250-12 with an XS1930-10 and the only thing that did not survive the swap is the server uplink. Zyxel XS1930-10, SFP+ port with media type set to DAC10G Asus XG-C100F in the server 10Gtek CAB-10GSFP-P5M, 5 m passive twinax, AWG26 a…
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 run pfSense on a small box with a Chelsio T580 and I want one of the QSFP+ ports feeding four 10G hosts instead of a single 40G link. The breakout cable is still on its way, so I would rather have the card in the right mode before it lands. pfSense box, Chelsio T580, one QSFP+ port sitting on a…
Setting up 10G between a server and a TP-Link switch, nothing exotic. The card shows up in the system, driver loads normally, but there's no link on the port at all - no errors, no negotiation attempts. server: Intel X710, four 10GbE SFP+ ports, firmware 9.140.76856 TP-Link switch, SFP+ port cable…
We pulled a pair of G8124E out of a decommissioned rack and I am rebuilding them as the aggregation layer for an internal test environment. Budget for branded optics is zero, so everything goes in with generic 10G SR modules of the type we already run elsewhere. Lenovo RackSwitch G8124E, ex-IBM…
My firewall is a Supermicro E300-9A running pfSense Plus 22.05, and both 10G SFP+ ports refuse to come up. Neither ix2 nor ix3 ever shows carrier, whatever I put in the cage. Hardware: Supermicro E300-9A, pfSense Plus 22.05 Ubiquiti DAC-SFP10-0.5M and a 10Gtek passive twinax cable Supermicro…
