United Kingdom joined 5 months ago
9 questions
9 comments
NOC shift lead from Manchester. Mostly Arista and Mellanox.
Replacing the ISP ONU with a Baudcom DB-1234-SFM GPON SFP stick in a hEX S: the stick registered with the OLT and obtained an IP with the spoofed MAC, but with sfp1 as WAN pings returned network unreachable, although the same configuration on ether1 (behind the ISP ONU) worked and Winbox showed no…
A first-time SFP+ deployment between a UniFi 16XG switch and a Tehuti Networks TN9310 SFP+ adapter, with transceivers the reseller called compatible, produced an Rx fault indication in the UniFi controller. Swapping the fibre ends (polarity) did not help. Hardware involved: Ubiquiti US-16-XG…
With two dual-port Mellanox ConnectX-4 cards, a MikroTik SFP+ switch, 1 m OM4 patches and mixed 10G/25G transceivers from several vendors, one NIC port showed link UP but got no DHCP and could not route, 25G transceivers negotiated only 1G, and previously stable 10G links dropped intermittently…
On Debian 8.11 (kernel 3.16) the poster ran ethtool -m on a Mellanox MT26448 adapter to read optical diagnostics (TX/RX power, temperature, voltage, thresholds) and got Cannot get module EEPROM information: Input/output error. Hardware involved: Mellanox MT26448 ConnectX-2, SFP+ optic with DDM…
I do small business installs, and this one is a fibre service handed off on an ADVA FSP 150-GE102Pro. The customer wants the WAN terminated on their own router instead of the carrier box, so it has to land in the SFP+ cage of a MikroTik RB4011iGS+. Nobody told me what fibre the service actually…
The two SFP ports (F1/F2) of a Brocade ICX6450-C12-PD, licnesed for 10G, would not come up with either a Brocade 1000BASE-LR SFP (33211-100) or 10GBASE-SR moduls over a 5 m single-mode patch to an ICX6450-24P. show media saw the transceivers but the interface reported GigabitEthernet1/3/1 is down…
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…
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…
The poster uses Ubiquiti (UBNT) SFP and SFP+ modules, both multimode and single-mode, in Cisco switches. They work perfectly in Catalyst 9300 and 3650 switches with current IOS, but in a Catalyst C1000 and a Catalyst 2960 the modules are detected on insertion yet reported as 'unknown' in 'show…