Nagios: Monitoring Interface Bandwidth Utilization Using Cacti Data

One area where Nagios is severely lacking is bandwidth utilization monitoring of network devices. Since I already have a fully-functioning Cacti server and a scaled up Nagios server, I wrote my own python plugin to do the job. (more…)

Cisco Nexus 5000 Series vPC Design and Configuration

Cisco Nexus 5000 Series vPC Design and Configuration

Whether you’re looking at the Cisco Nexus 5000 line for the Unified Fabric feature, the 1.92Tbps of throughput, or simply as an upgrade from the traditional Catalyst 6509 chassis, you will definitely want to take advantage of its Virtual Port-Channel (vPC) capability.


Cisco ASA: Configuring LDAP over SSL

Cisco ASA: Configuring LDAP over SSL

The Cisco ASA documentation for configuring LDAP over SSL authentication for VPN clients is limited in scope and extremely Microsoft-specific. If you’re running an OpenLDAP server or experiencing non-network related connectivity issues, there aren’t a lot of resources available to help. (more…)

Cacti Interface Traffic Graph

Dress Up Your Cacti Graphs

Cacti has been around for over a decade and is a terrific tool for graphing everything on your network from interface traffic to temperature and voltage. Unfortunately the default templates give you bland-looking graphs. Since you’re going to be eying your graphs on a daily basis why not give them a little more pizzazz? (more…)