FirstDigest » Cisco-technology

Cisco: Quick IOS check in 4 simple steps

Calin — Tue, 10 Feb 2009 11:25:50 +0000

This post is rather for the beginners in Cisco’s world than for advance professionals, but still I encounter situation when IOS image was corrupted even if it was uploaded to the device by a network guru. Why? It’s quite simple! Because you can be the master of the Cisco networking, but still sometime you cannot control the device behavior or the transport of the packets to destination.

The problems is that in case of a corrupted IOS image being uploaded on a Cisco device, and [...]

Cisco: Layer 1 link failure detection

Calin — Mon, 12 Jan 2009 11:59:03 +0000

It has been a while since I didn’t post anything here, but it was holidays and I used that time to relax and rest after a year of work. Following this idea I wish you all “Happy New Year” and all the best in 2009.

Today I planned to write about something easy to implement (just to get in shape), but ignored by some network engineer. For me, Layer 1 issues are very annoying, and here I’m talking mostly about the cases when everything look [...]

Cisco: Multilink PPP over Frame Relay (MLPoFR)

Calin — Tue, 18 Nov 2008 23:20:44 +0000

In this tutorial I propose to show something that is not very used these days, or at least not every day, but which can be tricky if you don’t know how to approach this type of configuration. To understand this, I assume that you know the basics about PPP, FR and Multilink. I will make a short summary here but I will not go into details:

PPP or Point-to-Point protocol is used to establish direct connection between two network points. It can provide authentication, encryption [...]