Tag: Cisco
Good News and Bad!
by Ryan on Jan.06, 2012, under General
Bad news is that as of the 2011-12-31 I finished working for my Employer in order to move back to my home country, so I no longer have direct access to (and responsibility for) VMWare (and all the other really cool stuff we had, infini-band, HPC etc.) To top it off I was told before I left they intended to implement vblock (I suspect they just wanted to make me jealous ;) )
Good news is that from the 2012-01-09 I am starting my new job which will be mainly SCCM to start but moving into Citrix as well. So you will likely see no more VMWare posts, however I intend to make it up to you all by posting lots more
SCCM CDP to WMI version 0.0.0.2 out
by Ryan on Nov.01, 2011, under C++, CDP to WMI, Cisco, Coding/Scripting, Projects, SCCM SMS, Windows
After a mass of updates to the code a new version is out, this is still experimental so should only be used in a lab environment.
Capture CDP packets and populate WMI for SCCM
by Ryan on Oct.25, 2011, under C++, Cisco, Coding/Scripting, SCCM SMS, Sys Admin, Windows
This little gem I wrote will listen to all interfaces on a computer for CDP packets. Once it has looped all the interfaces any packets it has captured are processed and added to WMI.
Using the attached SMS_DEF.mof we can extract that information and place it in SCCM. Anyone who knows what CDP is will see the benefit immediately. For the rest; CDP (Cisco Discovery Protocol), Cisco devices send out CDP packets every 60seconds each packet contains information about the port it was sent from and the sender. In a nutshell if my computer receives a packet then I can tell which switch I am connected to, what port on that switch and a few other bits and bobs about the switch. e.g. In a test environment I have a Cisco switch which connects to a Cisco IP phone which then connects to my computer, when exe runs I get two entries in WMI, one for the phone and one for the Switch.
The use case is that helpdesk may not know where a user is physically or where they are connected to the network and the user may be experiencing network issues, this would allow a helpdesk tech to locate the switchport the user is connected to and pass that info to the network team for troubleshooting saving both parties the hassle of tracing cables and also allowing reporting on where a user is plugging in over a period of time.
There is still a bit to be done for this but it does generally work.
It’s official, I’m a CCNA
by Ryan on Aug.21, 2010, under Cisco, General, Misc
As per the title.
I booked my exam on the 15th of July and passed my exam on the 20th of August. Took me about 6 weeks of studying for on average 4-5hours a night.
Cisco Wireless AP – VLANs and Multiple SSIDs Part 3
by Ryan on Jul.13, 2010, under Cisco, Sys Admin, VLANs, Wireless
Introduction
Hello again, welcome to the third and final part of this tutorial. Hopefully you have enjoyed reading Part 1 & Part 2 and have understood it all, so without further adue lets get started.
Cisco Wireless AP – VLANs and Multiple SSIDs Part 2
by Ryan on Jul.07, 2010, under Cisco, Sys Admin, VLANs, Wireless
Introduction
UPDATED 2010-11-23: There were a couple of typos in the code & a few lines in the wrong order. Thanks to Vic for letting me know about them.
Hopefully after reading Part 1 you have a general idea of what is going on. In this part we will do the configuation needed on CS1 and start to configure wlan1. I strongly recommend connecting via the console for this but it should be possible (if you are careful in which order you enter the commands that you could do this over ssh/telnet). During this period wlan1 will be unavailable to the users but wlan2 will be running fine so they shouldn’t notice any down time.
Cisco Wireless AP – VLANs and Multiple SSIDs Part 1
by Ryan on Jul.07, 2010, under Cisco, Sys Admin, VLANs, Wireless
Introduction
The purpose of this document is to explain how to setup and Cisco Aironet 1130ag with two SSIDs one for internal users which will authenticate via a radius server and the other for visitors that will use a wpa pass-phrase and will restrict users to Internet access only. This has (hopefully) been written in such a way that even someone with virtually no knowledge of Cisco should be able to read it and deploy a system successfully.
I should add at this point that I am not a Cisco guru in any way shape or form (though I am intending to get a CCNA & CCNP). So (I got my CCNA on the 20th August 2010) If you are and are reading this and happen to notice any bits that could be done better or are just plain wrong please leave a comment.
This is all based on some work that I have done recently, so I’ll give an example infrastructure and match the config to that example.
