Subnet Calculator

By arfs -
Don't be confused to calculate subnet of your IP Address. Please download and try this tool from Boson. Also useful to check wildcard Mask. It displays Host IP address, mask bits, the class of address, range of addresses for that class and the binary representation of that address.

Popular posts from this blog

Examining the DR/BDR Election Process

By -
Image
Routers Used : 3640 w/ NM-1FE-TX IOS : c3640-jk9s-mz.124-16a Objective : In this lab, observe the OSPF DR and BDR election processing using debug commands. Then assign each OSPF interface a priority value to force the election of a specific router as a DR. Scenario The backbone of International Travel Agency’s enterprise network consists of three routers connected using an Ethernet core. Asterix1 has more memory and processing power than the other core routers. Unfortunately, other core routers are continually elected as the DR under the default settings. In the interest of optimization, ensure that Asterix1 is elected the DR, because it is best suited to handle associated extra duties, including management of Link State Advertisements (LSA) for Area 0. Investigate and correct this situation. Step 1 Build and configure the network according to the diagram. Use the configuration files from the previous lab if available . Configure OSPF on all Ethernet interfaces. A switch or hub is req
Read more

Cisco binary image unpacker

By arfs -
Image
Cisco binary image unpacker is a software that allows you to unpack the IOS and ASA images. Follow this steps to use this software for GNS3. With this way the Router loading process can be faster. This is useful for those of you that do start and stop Router frequently. Donwload Cisco image unpacker 0.1  for Windows. Extract thi zip file to your specific folder.. Copy the IOS file to this folder, for example "c3640-jk9s-mz.124-16a.bin". On windows command prompt, type the following command: "unpack c3640-jk9s-mz.124-16a.bin" (without ""). The output file stored in temporary folder, in my case "C:\Documents and Settings\dion\Local Settings\Temp". Open the folder and you will find the unpacked file "C3640-JK.bin", file size is about twofold. Copy "C3640-JK.bin" to your IOS folder. Your can also rename the file to "c3640-jk9s-mz.124-16a(unpacked).bin" Open GNS3, On the Edit menu, choose IOS image and hyper
Read more

How to find Cisco IOS with Google

By -
I used Google as my primary search Engine. I will show you some trick to search Cisco IOS out of the Internet by using this powerful search engine. Type this keyword in Google.com: intitle:index.of ios parent directory bin Or just clickt here . You can also search for unique Cisco series. 7200 search with: intitle:index.of c7200*.bin -site:cisco.com Or just click here 3640 search with: intitle:index.of c3640*.bin -site:cisco.com Or just click here 2600 search with: intitle:index.of c2600*.bin -site:cisco.com Or just click here PIX search with: intitle:index.of cisco pix*.bin -site:cisco.com Or just click here
Read more