Cisco 2600 - novice question

[mrkan]

I have to configure two routers...

So I have question:
How do I assign IP address? I need to start Fast Ethernet 0/0, Fast Ethernet 0/1 and Serial Interface 0/0.
I have no idea how to produce IP address for these.
As far as I know, Fast Eth. 0/0 is for local IP addresses, and Fast Eth. 0/1 and Ser. 0/0 are for connections between the routers... for these connection I should use ~.253 or ~.254 ip addresses.

I need some light here.... I've checked many manuals and it was always shown how to set up interface with some ip address, but never how is that address produced.

Thanks.

 

[burtsbees]

router>en
router#conf t
router(config)#int fa0/0
router(config-if)#ip add x.x.x.x y.y.y.y
router(config-if)#no shut
The x.x.x.x is the IP address and the y.y.y.y is the mask. How do you plan to physically connect the two routers?

Burt

 

[mrkan]

thanks for quick reply...

so, how I determine x.x.x.x? The mask I am supposed to use is 255.255.255.0 since prefix for my ip addresses is always 24.

So how I find free ip adress since there could be more routers around. For example, I know that there are some more routers around that I can't see. What are theire ip addresses and do I choose mine simply by selecting one that is not used so far?

Thanks

 

[burtsbees]

Is this a live setup or for a lab? If it's for a lab that will not see the internet, you can use any IP address you want. If it sits behind your router in your LAN, you use an RFC1918 IP address.

Burt

 

[vipergg]

You have to find out what they are currently using for IP addreses on their network and work from there . Someone must have control of this info . The router itself does not produce the addresses , you just input them onto the interfaces . Also you need to know what they need .
1. Are they using a dynamic routing protocol
2. Are they using static routes ?
3. Are they natting any addreses .

If this is just for a lab setup then your best bet is to go to cisco.com and start reading the config guides there .