Tag Archives: cli

Cisco IOS – Understanding IGP Network Statements

One of the things that I find both counterintuitive and often misunderstood is the role of the network command in interior gateway protocols. This command is used in the router configuration mode on Cisco devices. While there are some protocol … Continue reading

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Thoughts on Cisco Learning Labs

For some time, I’ve been wanting to write an article about the product offering known as Cisco Learning Labs. My lack of familiarity of this offering has held me back from commenting in any significant way. A couple of weeks … Continue reading

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Using Notepad++ Vertical Selection for Mass Changes

Notepad++ has a really cool feature that I’d like to share with those who haven’t already stumbled onto it. This feature is the ability to select vertically. The typical linear selection found in text editors works most of the time, … Continue reading

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Cisco VIRL – The Virtual Internet Routing Lab

Cisco has been talking for some time about a product that I’m really excited about. This product is known as “VIRL”, pronounced like “viral”. VIRL is short for Virtual Internet Routing Lab. The promise is this will use IOU, short … Continue reading

Posted in Blogroll, Career, CCIE Security, CCNA, CCNA Security, Certification, Cisco Live, Events, General, Network, Technology | Tagged , , | 1 Comment

Changing Privilege Levels For Cisco IOS Commands

Over the past couple of weeks, the concept of privilege level has been addressed from the perspective of the user. This article will make use of the privilege by moving IOS commands from their default levels of 0, 1 and … Continue reading

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Setting Privilege Levels With Local Usernames

Last week we looked at options for configuring privilege levels in Cisco IOS devices. I mentioned that there are three primary methods for doing this. The first method, which we focused on last week, was using the enable command. This … Continue reading

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Using the “enable” Command To Set CLI Privilege Level

Last week I introduced the topic of privilege levels in Cisco IOS. I covered the fact that a user at privilege level x had access to any command that was less than or equal to x. In an effort to keep … Continue reading

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Cisco Privilege Levels

One of the concepts that is mentioned in the IINS Blueprint in the “Security and Cisco Routers” section is securing the management plane. A key concept dealing with management plane security is the “privilege level”. Over the next few weeks, … Continue reading

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Using an Alternate Telnet Port in Cisco IOS

I have occasionally been asked how to change the telnet port in Cisco IOS. One would expect a simple command like “ip telnet listening-port <x>”. However a logical command like that doesn’t seem to exist. Since a command to change the port … Continue reading

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VTY access-class Behavior With VRFs

Over the past few weeks, I have posted several introductory articles that deal with the concept of VRFs. One behavior that is modified when VRFs are introduced is the VTY access-class command. A router that is configured for VRFs will … Continue reading

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Saving Time with CLI Filters

If you have dealt with routers or switches for any time at all, you realize how long and cumbersome the configuration can get. This is especially true when dealing with router configurations that include voice, zone-based firewall or anything else … Continue reading

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Using Only the Cisco CLI to Decode Type 7 Passwords

For various reasons, I often find myself needing to decode a type 7 cisco password. There are many third party tools that can do this for you. This article describes a way to get IOS based routers to show the clear … Continue reading

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