A 1000BASE-T copper SFP (Arista SFP-1G-T) in an Arista switch does not link to a device that only rnus 100 Mbit/s, and a 10GBASE-T SFP+ does not fall back to a lower rate either. How does EOS handle speed negotiation for copper SFP modules?
The poster programmed an OEM copper SFP with a 256-byte firmware dump; the switch recognised the type but the module received no data, whereas the original worked, and no password error appeared. It failed on several units. Hardware involved: OEM copper SFP (24C02 EEPROM). Reported…
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…
A FLYPRO SFP-1G-CS-100M 1000BASE-T module in a MikroTik CRS112-8P-4S (RouterOS 6.47.10) was detected but reported no-link with sfp-rx-loss: yes, whatever the far end (MikroTik LHG/RB750Gr3, Ubiquiti, Cisco). Fixed 1G speeds, other module units and rebootts were tried; only a Ubiquiti switch linked…
After upgrading a CRS305-1G-4S+ to SwOS 2.12, SFP-GE-T 1000BASE-T copper SFPs stopped linking although the switch still identified them in the SFP tab; the same modules kept working on a CRS317-1G-16S+ with the same firmware. Modules inserted before the upgrade continued to work, modules inserted…
On a CRS326-24G-2S+ with RouterOS 7.7 three third-party 1G RJ45 SFPs failed: an HP 453156-001 (FCLF-8521-3-HP) showed no-link with auto-negotiation: failed, a Foundry E1MG-TX showed no-link with sfp-rx-loss: yes even with manual speed, and a Ubiquiti UF-RJ45-1G also stayed at no-link. Hardware…
Home setup, everything in one rack. I want to connect the NAS to the switch faster than gigabit, but I don't want to run fiber: the distance is about five meters, a plain patch cord covers it. D-Link DGS-1250-28X switch, SFP+ ports free TerraMaster F4-424 Max NAS, copper RJ-45 port short Cat6a…
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…
A QSFPTEK 10GBASE-T SFP+ module installed in port ix1 of a passively cooled Netgate 6100 reported 73 C through DDM although the room was at 20 C; the module is specified for 0-70 C and up to 2.5 W. The poster asked for known-good RJ45 SFP+ modules that stay within spec. Hardware involved: Netgate…
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 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…
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…
H3C-SFP-10G-T-SO 10GBASE-T copper modules (from FS or Solid Optics) worked out of the box in a FlexFabric 5940 (JH398A) with the JH181A 24-port SFP+ card, but in a FlexFabric 5945 (JQ076A) with the same card the ports only came up after manually running port up-mode on the interface. The poster…
Home rack, and the RB5009 has exactly one SFP+ cage. I wanted a second copper gigabit uplink out of it rather than pulling fibre across the room, so a copper module went in instead. MikroTik RB5009UG+S+IN, RouterOS 7.1rc4 MikroTik S-RJ01 1000BASE-T copper SFP in sfp-sfpplus1 Cat6 patch, about three…
