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Friday, November 29, 2013

Visualizing Wildcard Mask: Simple Calculation Tool in Excel

(Original subject: "Simple visual tool to calculate Cisco IOS Wildcard Mask")


I create this tool for you to easily calculate equivalent Wildcard Mask for any given IPv4 address and subnet mask.

You can make use of this tool when you have to configure Cisco IOS Access Control List, "network" command in routing protocols, and you can also do a quick double-check about whether the wildcard mask is matching the designated subnets or not.

In fact, this tool is revised from another tool I have posted before.

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