It’s makes me a sad engineer when I walk into a mess like this, it only makes the troubleshooting a nightmare.
Just a short note to you all know what has been happening for the last three months and why there hasn’t been any new content posted to the site.
It’s been a busy three months , took the ROUTE exam , work projects then changing job roles.
I recently picked up the CCIE Routing and Switching Certification Guide, (4th edition). SO I will be pouring of that soon.
I have about a donzen GNS labs that I want to add to the site along with my commentary, problems I had with GNS3 and issues I ran into to make them work.
I be writing up my own guide on how to setup GNS3 for the Mac Pro using Lion OS and lastly I plan to the move the site theme to a Thesis theme, been playing around with this of and on for the last month or so. So far I think it will allow allot more flexibility to how I can display content on the site.
This is what I have plan for August, by then the dust in the new office will be settled and I can start adding more content to the site.
PuTTY does not write its settings to a file, for people who wish to install this on an USB stick poses a challenge. When you run putty on a system that never ran it before, it will not have any of your saved settings. Only solution (that i know of) is to merged your registry settings with the system you running it on. (a bit intrusive.) So in just seven easy steps you can now have your PuTTY settings on your USB drive.
From your Windows start panel, click on “run”
Type “regedit” in the your run box.
Press “CTRL-F” (this will bring up the search box)
In the search box type “SimonTatham” (no space)
Click off Values and Data
You should now have the SimonTatham highlighted in your registry
Right click and select “Export”
I saved mine to the desktop and named it something that I would not forget what it it.
Once you have the file you can move it to your USB key and import or merge
it to which ever system you are working on.
That’s it, you’re done!
- Has full time IPSEC
- Eliminates the need for broadcast.
- Uses UNICAST (one to one)
- Uses MULTICAST FF01: (one to many)
- Uses ANYCAST (one to closest)
- Eliminates the need for HSRP/VRRP
- NAT is not longer used
- No more private addresses (the old v6 unique site local address is eliminated)
- Uses Global scope address 2000::/3 (internet2 address 2001::/16)
- Uses Link Local FE80: layer 2 auto generated
- Think 169.254.0.0
- (MAC – FFFE – MAC) = last 64 bits (48 bit MAC Address + 16 bit FFEE IPV6 )
- Smaller Harder size ( more secure)
- No need for a DHCP (uses auto generated prefix from the router)
- Easier localhost address ::1 oppose to V4’s 127.0.0.1
- IPv6 has eight blocks of 16 bits for a total of 128 (called hextets)
IPV4 RFC 791, September 1981 http://tools.ietf.org/pdf/rfc791.pdf
IPV6 Original RFC 1884, December 1995 (Now obsolete) http://tools.ietf.org/pdf/rfc1884.pdf
Revised July 1998 RFC 2373 (Now obsolete) http://tools.ietf.org/pdf/rfc2373.pdf
Revised April 2003 RFC 3513 (Now obsolete) http://tools.ietf.org/pdf/rfc3513.pdf
Current RFC 4291, February 2006 RFC 4291 http://tools.ietf.org/pdf/rfc4291.pdf
V 4’s 4.2 billion address pales in comparison to what V6 offers.
V6 has 340,282,366,920,938,463,463,374,607,431,768,211,456 available numbers
Three hundred and forty undecillion, two hundred and eighty-two decillion, three hundred and sixty-six nonillion, nine hundred and twenty octillion, nine hundred and thirty-eight septillion, four hundred and sixty-three sextillion, four hundred and sixty-three quintillion, three hundred and seventy-four quadrillion, six hundred and seven trillion, four hundred and thirty-one billion, seven hundred and sixty-eight million, two hundred and eleven thousand, four hundred and fifty-six.
http://www.thefreedictionary.com/undecillion < hear the pronunciation here.
The above is meant as a reference, information is not static.
Keep moving along folks there is really nothing to see here…. nothing really new to report here, people always said the end was near, the real news is that they thought this day would have taken place 8 years earlier. .. below is my brief editorial of what took place Feb 3 2011.
AfricNIC, APNIC, ARIN, LacNIC and the last of the last goes to RIpeNCC
http://www.nro.net/media-center/video-archive-3-february-2011 < video press conference here.
Side note, APNIC has half of the worlds population and the majority of the IP4 addresses.
APNIC walked away with three /8 blocks (2 which were received earlier this year)and predict that it will hand them all out within the next 3 to 6 months.
A side note;
OSPF (Open Shortest Path First) has many configurable topologies. One of being the Stubby Area, as if that didn’t confuse you enough they introduced the Totally Stubby Area when this was first explain to me, I couldn’t grasp the concept of what the instructor was talking about, at least not until I drew the network out and configured it out in GNS3, it was then I was able to seen it for myself.
FYI OSPF overview, stubby networks only used for a small area that need to block all the external routes in their routing table. Routing will show a default internal route pointing to their ABR. Generally in the OSPF world all things must connect to Area 0, the ISP link would normally flow out Area 0 ASBR I think of Area 0 as the OSPF body and other area as limbs (the analogy works for me). Click topology for larger pic.
If a network goes down, EIGRP will send out query messages to its neighbors to find an alternate route. EIGRP will do this for 180 seconds (three minutes) it will keep sending the query messages even if a path is reported within that time frame, the path will simply set in queue until all queries have been answered. While this message waits the link can become “stuck in active” and after the 3 minute period all neighbor relations will be torn down and the link will become active, afterward the rest of the neighbor relations are restored.
As a potential engineer one of the many basic skills you’ll need to master in your career is setting up a newly purchased router. Surprisingly I know a lot of Engineers that have worked in NOC’s (Network Operations Centers) for years, troubleshooting all sorts Cisco devices and various issues and never really having to configure anything. This is truly one of the down sizes of working in a large company; you tend to get pigeon-toed into doing on particular thing all the time.
Two skills are needed to know from memory.
• Basic setup a router or switch
• Basic password recovery for a router or switch Continue reading
While working on another article dealing with telnet and SSH. I ran across a command I never used or seen before. Originally I wanted see the configuration for line console and typed out “show run line console 0” but instead, for some reason or another I hit the enter key after I typed “sho run line” and saw this.
ConfigBytes#sho run line
Current configuration : 1034 bytes
1 : !
2 : version 12.4
3 : service timestamps debug datetime msec
4 : service timestamps log datetime msec
5 : no service password-encryption
6 : !
7 : hostname ConfigBytes
8 : !
9 : boot-start-marker
10 : boot-end-marker
11 : !
12 : logging buffered 4096 emergencies
13 : !
14 : no aaa new-model
15 : memory-size iomem 5
16 : ip cef
17 : !
18 : !
19 : !
20 : !
21 : no ip domain lookup
I just finished my CVOICE test. A requirement for work, the nice thing is that this will grant me the CCNA-Voice certification. Big thanks to Cisco Press CVOICE by Kevin Wallace.
The toughest hurdle in this book for was getting pass chapter 2 which goes in great lengths describing how a fax transmission flows through a VoIP network. I found myself re-reading certain paragraphs and full pages several times. Just to grasp the concept.
After reading this book I have defiantly walked away a better understating of dial-peers and how h.323 works. I want to emphasize that reading this book alone will not help you pass your CVOICE exam, this was merely an addendum of various materials I have gathered, to include a Cisco 1751 router purchased from eBay for 15 bucks.