An often overlooked aspect of managing network appliances like switches and routers is the necessity of configuration backups. Changes to these devices are usually infrequent, making backups easy to forget after finalizing a configuration. What’s more, network appliances often lack …
Tag Archives: Linux
DRBD and Nested LVM
DRBD is a opensource block-level storage system designed to provide distributed storage in cluster environments. Nodes of a cluster write changes locally and DRBD replicates those changes to other nodes. It supports both Primary/Secondary (master/slave) and Primary/Primary (master/master) configurations. I’m …
Centralized backups using rsync and OpenSSH on Windows 10
I consider backups to be the “desert island” service of IT; if you’re going to provide one service to your users or business, it has to be backups. Data changes all the time, users make mistakes, and disasters happen. What …
Monitoring Log Messages with Nagios Passive Checks
Nagios is powerful, industry-standard monitoring software that can track uptime, generate performance reports, and alert relevant personnel when something goes wrong. It’s probably the most important software I use on a daily basis.
Nagios’s primary mode of “service checking” is …
Tuning Cisco and Linux IGMP for AoIP
Modern AoIP implementations from vendors like Wheatstone or Telos utilize multicast networking to efficiently deliver audio streams among devices on a network. Without multicast, bandwidth usage and latency on the network can spike. Uplinks connecting access switches with the core …