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?
With auto-negotiation on, CRS317 and CRS326 SFP+ interfaces ran at 10G; with auto-negotiation=no, speed=10Gbps and full-duplex=yes the log still reported link up (speed 1G, full duplex) regardless of the advertise settings. On a CCR1009 the same configuration produced no-link instead, showing that…
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…
Standing up 25G uplinks from a QFX5120-48Y towards a second switch and a couple of new servers. Before I hand the segment over I want the link settings written down properly, and I cannot find where auto-negotiation lives on these ports. Juniper QFX5120-48Y 25G optics in the SFP28 cages et…
Small office, we are dropping the ISP-supplied box and terminating the fibre straight on the router. The handoff is AON, the provider only asks for a VLAN tag, no PPPoE and no ONT registration. What is in the rack: TP-Link ER7412-M2 V1, firmware 1.0.1, fibre into port 11 (SFP WAN) a TP-Link…
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…
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…
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…
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…
I inherited a Sun Network 10GbE Switch 72p with a couple of legacy boxes hanging off it that will never do more than a gigabit. The plan was to drop a 1G capable module into one of the SFP+ cages and be done with it. Sun Network 10GbE Switch 72p, SEFOS CLI over the serial console x2129a dual-rate…
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…
Rebuilding aggregation at one of our sites: a CRS326-24S+2Q+RM takes the custmer SFP+ ports and uplinks over 40G into a Huawei S6720. Short run inside the same rack, so a passive DAC rather than optics. MikroTik CRS326-24S+2Q+RM, QSFP+ port qsfpplus1-1 Huawei S6720-54C-EI-48S-AC, plain 40GE port…
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…
We are bringing up a leaf on an Accton AS9716-32D running SONiC master (build master.207726). Four of the 400G-capable ports have to run at 100G towards a firewall pair, and not one of them will link. Accton AS9716-32D, SONiC master.207726 INNOLIGHT TR-FC13R-N00 QSFP28 LR4 in the switch cage…
The poster asked whether a 10G SFP+ SR or LR optic in one switch can auto-negotiate down to 1G to link over fiber with a 1G SFP in another switch, and if not, how to attach a handful of 1G optical connections from a 1G switch to a 10G switch. They understood that Cisco SFP+ optics run only at 10G…
