Review: rob​tex​.com — DNS and Peering Tool

An aston­ish­ing resource that provide a lot details on BGP AS, IP address­ing, own­er­ship, whois, DNS check­ing and much more.

Reloading IOS Config at CLI for Dynamips/​Dynagen

David Sudjiman show us how to save and reload Cisco IOS con­fig­ur­a­tions from the com­mand line in Dynamips /​ Dynagen.

Dynamips, Dynagen, GNS3 0.7, IOS15.0 and Snow Leopard OSX

It works.

Using Choosy for OSX. A Better Way to Use Multiple Browsers.

I use mul­tiple web browsers all day. One for typ­ical web, and another for net­work man­age­ment. I need a way to eas­ily select which one I want.

Notes on Cisco Catalyst 6500 Architecture. (Or What Does 720 in Supervisor 720 Mean ?)

What does the ‘720’ in the Supervisor 720 stand for ? Or, what do you need to know about Cisco C6500 switch architecture.

Key Change for Cisco IOS 15 — Feature Licensing and How We Work.

Welcome to IOS 15, Feature licens­ing and com­plic­ated main­ten­ance procedures.…

Cisco Announces EOS and EOL Cisco IOS Software Release 12.4

Cisco announces the End of Life and End of Support dates for 12.4. Before IOS 15.0 is even warm­ing up, the pre­vi­ous ver­sion of 12.4 is already on life support.

Can You Learn Anything From Google or Facebook Data Centers ?

Google and Facebook have been puff­ing them­selves up about how clever they are at solv­ing tech­nical prob­lems. Is it just cheap mar­ket­ing, and is there actu­ally any­thing that Enterprise com­put­ing can learn from what they have shared ?

Google DNS — Not Proving to Be ‘All That’

So I have been test­ing Google DNS server with the new tool that they just released. It might be early days, but it ain’t as fast as the altern­at­ives for me.

Configuring Network Locations in Mac OSX.

When you are work­ing in a lab envir­on­ment, you often need to con­nect your laptop to dif­fer­ent net­works so that you can test stuff. For simple change like an IP address or a default gate­way a script is use­ful. But you may want to have a much more soph­ist­ic­ated pro­file, such as dif­fer­ent proxy serv­ers and mul­tiple eth­er­net ports. And if you are work­ing on dif­fer­ent sites, each one with dif­fer­ent IP address­ing and DNS details, and maybe even dif­fer­ent proxy set­tings or 802.1x. Mac OSX has a way for con­fig­ur­ing mul­tiple pro­files for your Ethernet con­nec­tion ( or Airport wireless).

Install GNS3 on Mac OSX Leopard

This post looks at installing GNS3 on Snow Leopard and has a num­ber of screen­shots and some tips on mak­ing it go well.

Putty, the Command Line and NO Clicky Clicky

While it may be a per­sonal pref­er­ence for me, I believe that you should only use the mouse when you don’t know what are doing. If you have a repet­it­ive task, then click­ing the same thing over and over shows that you are poor engin­eer. Lets hack putty to work from the com­mand line.

Setting the Defaults for PUTTY

Putty is is a great piece of soft­ware. Because it works and it’s free I find it installed on most cor­por­ate desktops as the default soft­ware for ter­minal cli­ent on Windows but not every­one seems to know how to set the defaults.

IOS: “Terminal Monitor” on, Off — Logging to Your Terminal

I get asked this ques­tion just often enough to post an art­icle. When you have enabled ‘term mon’, how do you turn it off ? How can you tell it’s work­ing ? And so on.

IOS: Console, Terminal, Monitor, VTY — What Is What ?

Sometimes when I talk­ing with other engin­eers about con­nect­ing a con­sole or ter­minal to a router, they don’t use the right terms. So, here is an art­icle that cov­ers the con­ven­tions for the terms con­sole, mon­itor and terminal.

IOS: Clearing an Interface Configuration

You need to clear an inter­face in IOS but there are a load of con­fig­ur­a­tion ele­ments there. Once com­mand can clear the lot.

IOS: Setting Terminal Window Length

Why does IOS always make you press the ‘more’ key all the time when dis­play­ing configs ?

Cisco IOS Order of Operation — Updated, Again

I often need to refer to the IOS order of oper­a­tion when I start stack­ing mul­tiple func­tions in an IOS configuration.

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