Cisco IOS CLI Regex: sh ip bgp in

Vitaly left a comment on a blog post with a clever IOS CLI Regex tip. I though I would pick that apart as an exercise.

IOS CLI Tip: More accurate pipe commands

Quick tip for m

Cisco Nexus NXOS and Fixing broken “switchto” syntax with alias

Why does Nexus NXOS use ‘switchto’ instead of ‘changeto’ for the CLI ?

show ip eigrp topology all

Once upon a time the command was “show ip eigrp topology” to show EIGRP topology, now it’s “show ip eigrp topology all” and the old command show only Feasible Successors.

Cisco IOS CLI Shortcuts

Mostly for my own reference. I really need to practice using the Delete Buffer commands and Ctrl-R Refesh as part of my muscle memory.

The poor man’s IOS Traffic Generator

This is a feature that I used to use years ago, but had forgotten about. For some reason, I remembered it today and it is still as useful as it ever was. Read on…

IOS: “terminal monitor” on, off – logging to your terminal

I get asked this question just often enough to post an article. When you have enabled ‘term mon’, how do you turn it off ? How can you tell it’s working ? And so on.

IOS: Console, Terminal, Monitor, VTY – what is what ?

Sometimes when I talking with other engineers about connecting a console or terminal to a router, they don’t use the right terms. So, here is an article that covers the conventions for the terms console, monitor and terminal.

IOS: Clearing an interface configuration

You need to clear an interface in IOS but there are a load of configuration elements there. Once command can clear the lot.

IOS: Setting Terminal Window Length

Why does IOS always make you press the ‘more’ key all the time when displaying configs ?

IOS CLI: show run linenum

You probably know this one already, but I have been typing ìwr tî for a long time and never stopped to look. Puts a line number at the side of the config so you can say to the person on the other end of the phone, see line 10………. r2#sh run linenum Building configuration… Current […]

IOS: Setting the TCP timeout on IOS

One of my favourite default commands on IOS is “ip tcp synwait 5″. Lets look into this command and why you might like to use it as well.

IOS: enable and …. disable ?

All these years, and I didn’t realise the opposite of the enable, was disable.

IOS: Reverse SSH console access – Part 2

Following my original post about configuring Reverse SSH on a Cisco console server, I wanted to make some followup to extend the usage.

IOS:Open Source Lab DNS and IP addressing

A number of Cisco Bloggers have talked about making labs available for others to use. However, part of what will be needed is some conventions to make these labs work for the largest number of people. Following Ivan Pepelnjak posting on Private Domain Names, and an earlier posting that I made on Reserved IP Address […]

IOS: Reverse SSH console access

I recently needed to secure the reverse console access using Cisco IOS router. Now for many years, we have been doing this over telnet and the configuration has been straightforward. But configuring it to support SSH instead of telnet is a little bit different, awkward in fact.

ip tcp timestamp

ip tcp timestamp I have seen this command a few times, today I am going to look into it and see what it does. Also, this is probably a classic CCIE lab gotcha.

Cisco ASA and IOS command tip – test aaa-server

I have been working on a VPN setup that loads the Group Policy from a CiscoSecure ACS server. During the process I discovered the test aaa-server command. Its very handy tool when you are doing this kind of stuff.

Read on…..

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