Network Services home page
Network Services home page
This is a collection of networkinging guides and examples that I've put together over the years, as a result of my learning from successful installations and more than a few mistakes. It's organized into areas of general information, network diagrams, descriptions of procedures, and example configurations of real network scenarios.
May they help your network installations to be pleasant ones.
Open Source tools for managing networks
http://insight.zdnet.co.uk/communications/networks/0,39020427,39197003,00.htm
I have been on the hunt recently for tools to make managing my ever increasing mountain of cisco kit easier. This is what i came up with:
The COSI (Cisco-centric Open Source Community) is a good place to start.
After perusing COSI's Web site, I came up with a list of some of the tools that I think could be particularly useful to Cisco administrators.
- ARPTrack: This Perl script maintains a history of MAC/IP pairs in a Cisco router's ARP table.
- Ciscocmd: This script sends commands to a large number of Cisco routers.
- CiscoConf: This program fetches Cisco configurations anytime syslog indicates that a router's configuration has changed. This could serve as a "poor man's system integrity verifier," similar to a very basic Rancid or Tripwire.
- cosi-ciscotool: This tool executes configuration changes on Cisco routers.
- GrotG: Also known as Gary's real-time on-demand traffic grapher, this script lets you monitor an interface (inbound, outbound, or both) in real-time.
- MRTG: Also known as Multi-Router Traffic Grapher, this tool helps monitor traffic patterns. (For more information on MRTG, check out "Configure IT Quick: Use MRTG to monitor Linux routers and firewalls.")
- RouteCheck: These Perl scripts check a router's routing table for stability.
- Show CPU load: This Perl script offers a quick look at the CPU load on a Cisco router.
WINDOWS:
WinAgents IOS Config Editor $99, so not free, but still OK.
Kiwi Syslog Daemon again not free ($99)
Paessler Router Traffic Grapher (PRTG) does one router for free. otherwise $50
Sys Admin > v15, i09: Network Device Configuration Management
Sys Admin > v15, i09: Network Device Configuration Management
Rancid is a combination of shell, Perl, and Expect scripts that work together to provide configuration management. Although the name implies Cisco-only support, the tool has grown to work with a multitude of devices from most major vendors. Adding extensions for new device classes is also fairly easy. Details about supported devices can be found at:
http://www.shrubbery.net/rancid/
howto configure Cisco 2503 over console from linux
Just another brick in the wall. » howto configure Cisco 2503 over console from linux
So, you want to connect to your Cisco device and yer wondering… dubya tea eff.
As one who absolutely sucks at hardware, allow me to introduce my own little tutorial or howto on how to connect to a Cisco router using the console from a linux box.
Psion Epoc Internet and Web Software
Psion Epoc Internet and Web Software
When you need a terminal, don't forget you already have the Comms application built into your Psion (except Revo models). Read the manual on the PsiWin disk. When you need more than that, here are some sources.
Mconsole (click to download) is a psion app specifically for accessing cisco units. You will need an mconsole cable. I am sure that you coiuld make one using the standard serial upload cable. If you want to know the pinouts then message me.
http://flipsidereality.com/blog/Uploads/mconsole-cisco.SIS
Lovely little explanation of ICMP (pdf Object)
Icmp.pdf (application/pdf Object)
Nice little pdf that explains how ICMP works, with data transfer diagrams of ping, traceroute and source quench (what red & wred use)