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?
What do the port states in the switchshow output of a Brocade Fibre Channel director or switch mean, and which of them point at the transceiver rather than the fabric?
A UCS 6332 fabric interconnect has only 40G QSFP+ ports, but the upstream switches are 10G. How can the FI be uplinked at 10G, and why does the breakout option not appear on some ports?
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 used IBM Emulex dual-port 10GbE SFP+ PCIe card (bent bracket, loose heatsink) made both TrueNAS Core and a Windows 10 PC hang for a long time during boot; the switch showed a link but neither OS saw the interface as active. Hardware involved: IBM Emulex dual-port 10GbE SFP+, Chelsio NICs, Intel…
On an inexpensive firewall appliance (Intel Atom C3758R, six 1GbE igc ports and two SFP+ cages wired to the CPU) OPNsense showed four ix interfaces instead of two and the SFP+ ports stayed red/down with a copper SFP+ RJ45 module, although the link LEDs lit. ifconfig -v identified ix0/ix1 as the…
A FortiGate 500E displayed the message This port is using a third-party transceiver on an SFP+ port; the poster asked whta it meant and which SFP+ specification to use. There were no errors or link problems, only the log line, so the real question was whether it signals a fault, degrades support…
On Zyxel XGS4600 switches, 10G and 1G SFP+ transceivers (including an FS.com DWDM-SFP10G-80) intermittently stopped transmitting; only removing and reinserting the module restored the link. Transceiver statistics at that moment showed TX power -inf dBm, voltage at the 3.00 V low alarm and TX bias…
Cisco-compatible CWDM SFP modules that had worked in Dell PowerConnect 6024 and 6224 switches produced a transmit failure error in a PowerConnect 8024F, presumably because the 8024F ports are SFP+. The poster considered Finisar FWLF1524P2Vxx modules but wanted confirmation from someone with a…
After a complete power loss a Dell R740 with a four-port Broadcom NDC (2x SFP+, 2x 1GbE) booted normally but the fibre SFP+ modules stayed unpowered and disconnected; a reboot did not help and only physically removing and reinserting the modules restored them. Dell support pointed at drivers and…
The poster wanted to connect a UDM SE (10G SFP+) to an Enterprise XG 24 switch (25G SFP28) and asked whether an SFP+ DAC would work with the SFP28 port falling back to 10G, or whether an SFP28 DAC was preferable. The concern was whether the SFP28 cage would fall back to 10G with an ordinary SFP+…
On two sites a UNAS Pro (UniFi RJ45 SFP+ module) and a UNVR (UniFi fibre SFP+ module) dropped to 1G after every firmware update or power cycle; rebooting the device, the port or the switch did not help, only physically pulling and reinserting the module (or reseating the fibre) restored an…
After UniFi Network 10.0.140 / switch firmware 7.2.123 several operators saw SFP+ ports (UI optics, UACC-OM-MM-10G-D, MikroTik XS+DA0001 DACs, UACC-CM-RJ45-MG copper modules) flapping on US-XG-16, USW Pro Max, UDM Pro and USW-24-Pro units, with STP State Flapping alerts, ports blocked, and switches…
On a CRS226-24G-S2+RM (RouterOS 6.42.11 long-term) the SFP+ port stayed at no link, not running, slave after a power loss, while software reboots were fine; disabling and re-enabling the interface fixed it manually. The problematic module was a Huawei MA5671A GPON SFP, other SFPs behaved, and the…
FS.com 40 km 1550 nm SFP+ modules (item 11592) showed their information in a MikroTik CCR1016 but never linked in the SFP+ ports, whatever the auto-negotiation, 1G/10G speed or flow-control settings; standard 10G modules (item 29851) worked in the same ports, and the 40 km modules ran at 1G in…
We are moving the office uplinks from copper to fibre and the quote that came back has DrayTek-branded optics in every line. Before I start arguing about the difference against ordinary 10G modules I would like to know whether the hardware actually cares what sits in the cage, because the…
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…
I look after a two-building site and the access switches were replaced with Aruba 2540s a while back. The fibre between the buildings has not been touched, but since the swap the uplink refuses to come up. Aruba 2540 on our side, ports 51 and 52 used for the uplinks Aruba J4858D 1000SX in the 2540…
Bringing up a 10G uplink from a PA-3220 to a new core switch. The module went into a free cage on the firewall, the switch side is configured and waiting, and the interface simply refuses to come up. The port LED blinks, which is what made me assume the module was at least being powered. Palo Alto…
Bench work: re-coding a small batch of SFP+ modules so they carry the vendor string and part number the customer's kit expects. The edit itself is trivial in a hex editor, the write goes through, the read back matches byte for byte what I wrote - and the host still throws the module out. generic…
I look after a small office network and put in a DrayTek VigorSwitch FX2120 to get a 10G core. Both 10G links, to the router and to the NAS, came up on their own within seconds. What I cannot do is get a single 1G device onto the switch through the SFP+ cages. Switch: DrayTek VigorSwitch FX2120…
We are a small regional ISP rebuilding the optics budget for next year. Every 10G spare on our shelf is coded for exactly one platform, so the spares pool is roughly three times larger than our failure rate justifies. The idea on the table is to buy re-codable modules and code them ourselves as…
Commissioning a 10G handoff for a customer on a 3930 that was already on site. The module is Ciena's own, pulled from our stock, and the port does come up - but the operational state is UCTF instead of Ena and the uncertified transceiver alarm sits there permanently. The acceptance test includes a…
I am putting together a switchless Fibre Channel setup at home: one box holds the storage and has to act as the FC target, the other two are plain initiaators. No FC switch in the middle, just direct cables between HBAs. Hardware: QLogic QLE2694 in the storage box, the one that should be the target…
I look after a small pool of FreeBSD boxes and I am adding 10G to one of them. The card went in, the machine boots fine, but the OS refuses to make an interface out of it. Server on FreeBSD 12.1-RELEASE-p1, stock GENERIC kernel QLogic FastLinQ QL41112 dual-port 10GbE SFP+ adapter SFP+ optics in…
I run a backup storage system in a data center. A pair of DD9900 in HA, network ports on the NDC QLogic. After a reboot or reseating the module, port ethMa stops seeing the transceiver, and it's not a one-off - it's a stable, repeating pattern. Dell DD9900, DD OS 7.2.0.95, HA configuration NDC…
We run a pair of ThinkSystem NE1032 RackSwitch units as top of rack in a small colo cage. The Lenovo-branded optics we inherited only cover half the ports, so the rest got filled with generic SFP+ modules and a couple of short DACs out of the same batch we already use on other vendors' switches…
I look after a mixed Zyxel estate on one site and I am putting together a vrey basic optical health check for the fibre uplinks: temperature and Rx power per port, so I can see a link degrading before the users report it. What is involved: Zyxel GS1910, older access switch with SFP uplinks Zyxel…
We are adding capacity to a small FC fabric and bought compatible 16G short-wave SFP+ from an optics supplier instead of paying the switch vendor price. The switch refuses them. Brocade G610, Fabric OS 9.x generic-coded 16G SWL SFP+, correct wavelength and reach according to the label Brocade-coded…
Second hand HPE 5130 for the rack at home, and it arrived with four HPE JD092B X130 10G SFP+ SR modules in the box. I bought new OM4 LC patch cords, wired one SFP+ port to the 10G card in the server, and got absolutely nothing. HPE FlexNetwork 5130 24G PoE+ 4SFP+ EI (JG936A) 4x HPE JD092B X130 10G…
I run a Turris Omnia NG at home and the last thing sitting on the metallic WAN port is a two metre hop to the ISP router. I would like to move that hop into the SFP+ cage and free the copper port for the lab side. The official Turris SFP+ copper module (RTROM01-RTSF-10G) costs about what a small…
Building a storage box at home and picked up a dual 10GbE Solarflare SFN7122F (SFC9120) because it was cheap. The card itself looks healthy, the system sees it and both ports enumerate, but not one of my existing multimode SFP+ modules will bring up a link in it. Solarflare SFN7122F, dual port…
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…
We run packet capture on a handful of Napatech cards and I am putting together the optics order for the next rack. Before spending anything I want to understand what the qualified module list actually means in practice, because the wording leaves room for interpretation. Napatech NT40E3 and NT20E3…
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…
We are lighting a handful of channels over one metro pair with passive mux and demux at both ends, 100 GHz plan. Everything I can actually source is fixed-wavelength DWDM SFP+, a separate part number per channel, and keeping spares that way is getting silly. 10G aggregation at both ends, SFP+ cages…
New ESXi host going into a rack that hangs off a campus 3850. Management on copper came up without drama, the 10G uplinks did not: as soon as the server boots, the switch port drops into err-disable and the host sees nothing on that vmnic. Lenovo ThinkSystem SR650, 7X06CTO1WW, with an Emulex VFA5.2…
Home setup, and I am trying to get rid of the ISP router on a Cosmote GPON line. The idea is to run the fibre straight into the UDM-Pro and let the stick do the ONU job, but the provider only accepts the session if the 12-character serial and the device model string of the old CPE are presented, so…
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…
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…
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…
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…
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…
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…
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…
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…
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…
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…
