Daren Matthews

These are specified in the $NAGIOSHOME/etc/checkcommands.cfg file. Where there are parameters available for a command, these can be passed through from services.cfg.

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Booting up the Router

Cisco routers can boot Cisco IOS software from these locations:

1. Flash memory
2. TFTP server
3. ROM (not full Cisco IOS)

There are some options which provide flexibility and fallback alternatives: Read more…

Cisco announced more details on its plans to bring IP routers to the world of satellites (or shall we say ‘solar system of satellites’?).

At its Cisco Live user conference last week, the company said that it was about to launch a trial run of its Internet Routers In Space (IRIS) program with the US defense department.  READ MORE AND VIEW VIDEO:

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If you want to practice radius configuration, or if you are testing a Cisco RADIUS setup without having access to the production server, here is a nice solution and sample config.

The Cisco configuration is for the IOS.  If you want to know how to configure on CatOS, read this post Read more…

This has been available since IOS 12.3(4)T/12.2(25)S. For each configuration command that is executed, the following information will be logged:

• The command that was executed
• The configuration mode in which the command was executed
• The name of the user that executed the command
• The time at which the command was executed
• A configuration change sequence number
• Parser return codes for the command

You can have this information stored in a local buffer or sent to a syslog server.  Here’s a basic configuration that will get you going:

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Have you lost or corrupted an IOS?  These procedures descibe:

• How to recover an IOS from rommon using TFTP
• How to recover an IOS from switch: prompt using Xmodem Read more…

BPDU guard and root guard are similar, but their impact is different. BPDU guard disables the port upon BPDU reception if PortFast is enabled on the port. Read more…

This is the minimum configuration needed to support inbound SSH sessions on a router (you might want to add transport input ssh to the line configuration if you want to disable telnetaccess to the router): Read more…

Another aide-memoir Read more…

Scenario: Say a device in your network performs incremental backups out to a server on the internet.  These backups consume bandwidth and ruin the quality of your VoIP calls.  You wish to throttle the bandwidth for this server traffic between 6 and 10pm (when you feel you need good phone quality). Read more…