India joined 1 year ago
8 questions
14 comments
Datacenter technician from Pune. Mostly Huawei and H3C.
An out-of-the-box ES-48-Lite (1.9.3) was connected to an EdgeRouter Infinity ER-8-XG (2.0.9-hotfix.2) with a UF-RJ45-10G module on each side and a Cat6 cable. A laptop on the switch obtained a DHCP lease from the router only after about a minute and then could not reach the router or the internet…
Used Intel 82599ES 10-Gigabit SFI/SFP+ NICs from eBay were connected with 10Gtek SFP+ DACs and, via QNAP switches, with 10Gtek SR transceivers over OM3. On Linux dmesg looped NIC Link is Up 10 Gbps / NIC Link is Down; on FreeBSD the interface showed no carrier and DHCP failed. allowunsupportedsfp=1…
In a home lab with an Aruba S2500 PoE switch and an Intel X520-DA2, three of thirteen cheaply bought Intel AFBR-703SDZ-IN2 SFP+ modules (around 15 USD each) failed within three months: links dropped with dark activity LEDs, two on the switch side and one on the NIC side. Warm and cold reboots…
On a Supermicro SYS-1019D-FRN8TP running VyOS 1.4 rolling the on-board Intel X722 (i40e) did not recognise an ISP-supplied 1310/1270 nm single-fibre SFP nor other spare optics; ethtool -m returned Cannot get module EEPROM information: Invalid argument. The poster asked how to apply the well-known…
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…
We have a dark fibre span of roughly 80 km where the owner will lease us exactly one strand - a second core is either not there or priced like a small building. Both ends terminate on chassis with XFP cages, and the service on top of it has to be 10 GbE. So what I need is a single-fibre BiDi XFP…
A brand-new retail Intel E810-XXVDA2 on Windows Server 2022 (Intel driver 1.12.164.0 from release package 28) was connected to an SFP28 port of a Ubiquiti USW-Pro-Aggregation switch. With an SFP28 DAC the link came up at 25G immediately, but with SFP28 optical transceivers (Ubiquiti…
Two Cisco Catalyst C1200-48T-4X switches were connected back-to-baack with Cisco SFP-10G-LR modules in the ge49/te1 SFP+ slots. Both switches recognize the transceivers, the interfaces are administratively up, both ends transmit light and the DOM optical values are good, yet no link is established…