Cisco Catalyst 1924 Switch / 2501 Router Problem

[DL36]

Hello,
I'm not sure if this is the correct place to put a thread such as this, but I figured that you guys would have an answer for me:
I am trying to set up a small network using a Cisco Catalyst 1924 Switch.  I also have (2) Cisco 2501s that can be implemented into this network.

I am not proficient in networking at all, I have the basic knowledge to program the units, but I'm even having problems with the physical setup.

I'm trying to get the computers on the switch to talk to each other, and more importantly, share the connection to the internet.  I'm not sure where I should hook in the ethernet cable that provides the internet connection?

Also, would it be best to use a router in this scenario?  Where should I implement it?  Where should the internet connection be placed in this scenario?

Any help that can be provided would be very appreciated.
Thank you.

 

[mro7]

This kind of raises more questions than it answers;

Is this just 1 network, or multiple? If only "small" as you say, then having 2 routers is probably not necessary, also - your switch has VLAN capabilities, so have you thought about separating network traffic by creating multiple VLANs? You mention an ethernet cable re: internet connection; does this mean you're using ADSL? In which case you'll need a registered IP address for the WAN interface of the router having the net-connection, some NAT, and also some access-lists/firewalling on that interface aswell.
If this is all sounding a bit much, then just get the basics going: plug all the PC's into the switch and check connectivity. I'd recommend doing away with one of the routers, and just use the other one for your internet connection.... and take it from there.... if you're getting stuck, then post some more info

 

[DL36]

Thanks for your help. I have decided to totally throw the routers out of the picture. This will just be one network. Basically, would you be willing to walk me through this step-by-step?

I have heard from another source that I need straight through cables from the PCs to the switch. I was under the impression that I needed to use crossover? What type do I use to link the ADSL line into the transciever / AUI port.

What do you mean registered IPs? NAT? I understand firewalls, etc.

Thanks again for your help.

 

[mro7]

Straight through cables for the PC's to connect to the switch is fine - just any regular CAT5 will do.

Have you got some kind of ADSL router? Or just a wall-box?

 

[DL36]

I have an ADSL router. Is it possible to use cross-over to the PCs? I've already made cables for them...heh.

Is there a way that I can get information to and from you faster? Maybe an Instant Messanger or email address?

Thanks

 

[mro7]

Yeah, you could use X-over cables straight to the PC's, but it would be more usual to use regular cable and plug everything into the switch.
The thing to think about now would be how are the PC's accessing the net, and what IP addresses do they have (if any), is your adsl NAT or NONAT?

 

[TheOldMan346]

DL36,

You've basically got two issues here; creating the LAN and sharing internet access. You can create the LAN with just the switch but I think it will be a bit easier to include a router in the mix. You mention the Cisco 2501's and also an ADSL router. What make/model is the ADSL router?

Creating the LAN

You've decided to make this one network connected with the Cat1924 switch. You DO need to use straight-through cables to connect the computers to the switch. The switch ports are classed as Data Comm Equipment (DCE) connections and the NIC's on the computers are Data Terminal Equipment (DTE). Connection of DTE to DCE requires straight-through. DCE to DCE or DTE to DTE requires a cross-over cable.

All the computers plugged into the switch will be on the LAN. With only a switch, you will need to assign a static IP address to each computer since there is no DHCP server. If the ADSL router includes a DHCP function, you can leave all the computers set to acquire an IP address automatically. They will get the address from the DHCP server in the router.

Sharing the internet

A router joins separate networks. With an ADSL router, the separate networks being joined are the internet (WAN) with your network (LAN). Depending on the make/model of the router, it may be as simple as plugging the switch into the uplink of the router and configuring the proper gateway in the computers.

Post back with the other information and we can follow up on this.
What goes around - comes around.
The Old Man

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