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Setting UP a cisco 1721 for a T1 - NOOB

Posted on 2007-03-18
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Last Modified: 2010-04-17
OK, before we get started just want to say thanks to whoever helps me out with this one.

Here is the problem: I work with PBX's and t1's all the time setting up the PBX is my main thing I have a t1 provider that is awsome and they setup the routers for me everytime and QOS. The thing is that it couse the $250 per setup and 24.95 for the router least that needs to stop so I need to learn how to set them up. I am in a word DUMB when it comes to this stuff. I nothing about nothing so I need to know how to get this doen from the very start to the very end. So anyone willing to help that would be great like I said I know very very very little about setting up a Cisco. Below is the outline that I need to learn.

1:Setting the Cisco Up From the very begining
2: Setting up QOS for the router since there will be VOIP phone running through a switch
3: What is NAT and what is it going to do for me
4: Setting up all IP information for the router
5: Anything else I forgot or don't know that needs to be done

Thanks Alot For The Help.
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Question by:hitek4905
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nwalter earned 125 total points
ID: 18758254
If you're not familiar with CISCO IOS commands this is going to be difficult.

Here's some things to get you started.
1.  You will need a computer with a serial port and the blue console cable that came with the router.  If you don't have one you'll have to look up how to make one or buy one somewhere.  Once you have that cable you connect it into the console port of the router on the back and the serial port on your computer.  From your computer you need to open some type of terminal software, in windows hyperterminal works fine, and create a new connection to your serial port.  Set the port to 9600 bps, 8 data bits, no parity, 1 stop bit and hardware flow control.  Now turn on the router and you should see it start loading on your terminal screen.  If this is new, out of the box cisco it is going to start a sort of mini-wizard to configure user accounts, security, the router name etc.  Fill in all of this stuff as appropriate but refrain from filling in any IP info for the router yet because the wizard usually does it wrong anyways.

2.  We should skip over QoS until you are familiar with the router and how it works because this is not easy.

3.  NAT - Network address translation.  It translates private IP address space (10.x and 192.168.x) into a public, internet routable address.

4.  Ok, I started to type this out.  But again, honestly it will take me 2-3 hours to walk you through this in text.  So i'm just going to recommend a book, pick up the Cisco Field Manual: Router Configuration, ISBN: 1587050242.  It should have everything you need and all the commands and steps listed out for what you're trying to do.

5. remember copy run-start to save your changes....  Otherwise everything goes poof when you restart the router.  I also highly recommend issuing a sh run or sh start and copying and pasting everything that's listed there into a text file and save it on your desktop after you have the router configured.  If you have this you can just copy and paste it back into the terminal window should you ever lose the config on the router.
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by:Dave_2point0
Dave_2point0 earned 125 total points
ID: 18758453
Wow. Big question.

Ok, here we go.

1. Here's the installation handbook. http://www.cisco.com/en/US/products/hw/routers/ps221/products_installation_guide_book09186a008007e585.html
Start digging through that to find some more specific questions. "How to I install it?" is a bit broad. Narrow it down as best you can and we can get you a little further.

2. There's a reason a guy can charge $250 for setting up stuff and this is one of them. QoS is not that simple to understand and implement. http://www.cisco.com/en/US/tech/tk543/tk759/tsd_technology_support_protocol_home.html may help here.

3. NAT is "Network Address Translation" and is used to translate several ip addresses into a single source address, such as in several computers using an internal network and accessing the internet from a single IP address. Very useful. More info here: http://en.wikipedia.org/wiki/Network_address_translation

4. See part one.
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