Top Ten Cisco IOS commands

[TechBoyJK]

Hi Guys,

I need to brush up on my cisco skills. I'm googling this, but I was curious if anybody could chime in on their most used CISCO commands, and any switches that seem to come along with those commands.

Even if you only have a few, please post and give a short explanation of what they do and why you use them. Thanks!

 

[drebo]

This is pointless...everyone who uses Cisco is going to have different things they look at and different purposes for running Cisco equipment. Context is everything.

For instance, I commonly use the command "sh ip bgp vpnv4 rd (route-distinquisher)". That command is useless to anyone outside of the service provider world.

Need moar context.

 

[spidey07]

sh run int
sh ip int brief
sh ip route
sh int status
sh int
ping
trace
sh spanning-tree
sh ip <routing protocol> nei

 

[alkemyst]

Get the IOS Cookbook by O'Reilly. It's going to be the best bang for buck and is laid out like a real cookbook. You look up what you want to do (configure a vlan for example) and it gives you the recipe.

There is a Version 2 out, so make sure you get the right one.

www.addall.com will find you the best price.

to add to the list above:

show running-config
show startup-config
show arp

 

[imagoon]

Hi Guys,

I need to brush up on my cisco skills. I'm googling this, but I was curious if anybody could chime in on their most used CISCO commands, and any switches that seem to come along with those commands.

Even if you only have a few, please post and give a short explanation of what they do and why you use them. Thanks!

Only 10? 10 won't get you far.

 

[imagoon]

sh run int
sh ip int brief
sh ip route
sh int status
sh int
ping
trace
sh spanning-tree
sh ip <routing protocol> nei

enable!

 

[spidey07]

Only 10? 10 won't get you far.

Fine, I'll give you the only one you need...

?

 

[azev]

uhmmm "wr erase"

 

[spidey07]

deb all

 

[bobdole369]

show
(definitely my most used command)

 

[RadiclDreamer]

deb all

wtf just happened to my router!!!

 

[spidey07]

wtf just happened to my router!!!

Just went 4 paws. As in four paws straight up in the air, he's done.

u all!
u all!
u all, dammit!

 

[Pheran]

deb all

wtf just happened to my router!!!

I had someone do this at work once. Then they asked me why their router was locked up. LOL

 

[spidey07]

I had someone do this at work once. Then they asked me why their router was locked up. LOL

Oh he wasn't locked up. He was just very, very, um....busy.

 

[janas19]

#1: Thou shalt not destroy thy router

 

[SpunkyJones]

sh tech
un all
sh proc cpu his
reload at
no logg console

 

[MtnMan]

enable
sh
conf
int
route
net
ip
no
wr
?

no parameters, just commands

 

[Railgun]

reload at

The fun way to screw with someone.

 

[her209]

show cdp neighbors

 

[RadiclDreamer]

show cdp neighbors

sh cdp neigh det

 

[imagoon]

The fun way to screw with someone.

Reload at and Reload in are safety net commands. Working remotely you basically do:

copy run start
reload in 60 (some amount of time that you know you will finish entering commands)
{stuff}

And either: "hey it worked": Reload cancel
copy run start

or: "Crap I locked myself out of the router"
wait for the 60 minutes to run out
log back in and curse that you did something stupid.

The alternative is walking a phone tree trying to get someone on site to reboot the remote router.....

 

[Railgun]

I know this. But in a non-production environment....

Best practice there would be to have some out of band management to get in via the console.

 

[imagoon]

I know this. But in a non-production environment....

Best practice there would be to have some out of band management to get in via the console.

That works until it is some tiny sub office with a DSL line. They don't often want backup lines / network serial adapter etc.