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How do I set this up???

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by gwnfld 1 view

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I have been asked to setup a wireless network for a small company. Here is all the hardware I will be working with and how they are currently configured.

1. T1 - currently being used to access the internet.
2. Cisco 2600 router - used to connect the T1 line
3. Cisco Aironet Access Point ? All laptops have the wireless cards for access.
4. Netgear hub - used to provide Ethernet connection for the Cisco Aironet Access point.
5. They?re using routable IP addresses for all the workstations 208.252.10*.*** Not a good choice because of security
6. The DNS and Gateway they are using is being provided by the company who is supplying the T1(I think).
7. Their mail is POP3 and have talked about having there own mail they would like to have something like Exchange.
8. There is one Copier/Printer they are using and it is connected through a hub via an Ethernet.

They have a Compaq Proliant ML330 server small but will do the job. They would like an actual wireless network and I am definitely looking for suggestions.

The server is set up with Windows 2000 I will setup as a domain controller and use the Cisco Aironet Access Point as the topology. I will use the following IP range in my DHCP scope;

192.168.32.3 - 192.168.32.25 Workstations and print queues
192.168.32.2 Server address
255.255.255.224 Subnet mask

Currently they are using these addresses:
198.6.1.* DNS Server Pri
198.6.1.* DNS Server Sec
198.6.1.* DNS Server Sec
208.252.10*.*** Default Gateway
255.255.255.224 Subnet mask, provided to them.

After finishing the server setup portion and getting the workstations logging in to the network how do I configure the T1 for internet connection. What configuring needs to be done to the Cisco 2600 router. I have been in this type of router before when I was studying for my CCNA so I?m not afraid to get in it although this will be my first time on a live one. gwnfld@yahoo.com

8 replies

by techrepublic

This isn't a question which can really be answered in this forum. It's a little like listing a bunch of car-parts, saying you've built one from scratch once before and asking for help with this one - via text messages!
I would recommend that you find someone local and sit down with a notebook/white-board and maybe somebody from the client's office and spend an hour or so determining their actual needs and options.

Good luck!

by bohicam1

From what I see, everything checks out except for your subnet mask/ip address choice. Your aironet access point will act as dhcp. as long as it is plugged into the same hub as your server and the hub/switch that goes to the rest of the network, you will have connectivity for all points. The subnet mask you are choosing however is very limited in its addressing scope. Recall from tcp/ip class... a subnet mask of 255.255.255.224 will only yield a few ip addresses that are valid. For instance....the .224 implies that ip addresses can only go in increments of 32 therefore, you can only have ip addresses of 192.168.32.32, .64, .96, .128, .160, .192, .224.
You can use whatever address scheme you like however if you simply go 192.168.1.1....254 with a subnet mask of 255.255.255.0 (like most other networks that are private internally). This will allow you to use any number between 1 and 254 in your addressing scheme. Make the default gateway for the clients the same IP address as the aironetand you are on your way.
Good luck!

Mike
ps. please email me at above address if you need any further explanation, I would be more than happy to help.

by bohicam1

WOW! I am such a bonehead. After posting that I realized that my range of IP addresses is wrong. Using the class "C" fix, your available ranges would be 192.168.32.33 to 192.168.32.63....192.168.32.65 to .95...192.168.32.97 to .127 and so on...in any case, your plan of having assigned ip's of 192.168.32.x to .25 would still not be valid.
Thanks, I hope I didn't confuse you too much

Mike

by ckilday

How many ethernet ports are on your 2600? It sounds like you have a routable network for the desktop machines and are planning on using a non-routable (192.168.x.x) network for the wireless laptops. This can be done on a single ethernet interface,but it's not clean and if you have a problem, troubleshooting will be more difficult and possibly have more of an impact on the organization. You should spend some time diagramming out the network as this will help you identify what addresses are going to be appearing where. Contrary to what Mike said, you can have the addresses you were planning on, but you must configure the router to support them. The commands you will need in the router are "ip classless" and "ip subnet zero", entered from global config mode. This will allow variable length subnet masking (VLSM) and support subnet 192.168.32.0 with your default gateway being 32.1 and your broadcast address being 192.168.32.31.
A tip for your wireless installation: when you configure the AP, put in your own SSID and keep it secure. This will have to be matched on each wireless PCMCIA/NIC. It provides a level of authentication to prevent unauthorized users from gaining access to your network. Also be sure to turn on LEAP. This provides for encryption and also changes keys on a random basis per user every 15-20 minutes. This protocol has not been broken yet, unlike WEP.
If you'd like more assistance, drop me a line at chris.kilday@ctg.com.
Best wishes,
- ck

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