Just wondering... Because if it can, couldn't you use it as your cable modem router?

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As long as you are running the correct IOS version, then yes, it does support NAT. Take a look at Cisco's feature navigator to determine the correct IOS version for you particular router.

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Has anyone used a 2500 for their cable/dsl router? I'm trying to think where the RJ-45 cable modem would plug into a 2500.. Could you plug it into a serial port with a connector?

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Your cable router is most likely using an ethernet connection. So if you put two and two togeather you can assume you would plug it into a ETHERNET PORT.

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quote:

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Originally posted by NewTecker
Your cable router is most likely using an ethernet connection. So if you put two and two togeather you can assume you would plug it into a ETHERNET PORT.

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What is the exact 2500 series router you have? 2501? 2514? 2524? 25xx. Some 2500 series routers have RJ-45 jacks for the ethernet connections. I used to have a 2524 that had single RJ-45 jack instead of the AUI port. The 2505 router comes with a 8 port hub with 8 RJ-45 Jacks. If your router has a AUI port on then you get the AUI transceiver and connect it to those.

Now of course if you have only a single ethernet port port I suppose you could connect your cable modem directly to a hub or switch along with the router and all the other devices on the LAN. Then assign each device on the LAN an IP address and the default gateway to a sub interface on the ethernet port. Then have the another sub interface on the ethernet interface assigned an IP from the ISP.

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I don't think a 2500 can talk to Cox, Comcast, AT&T through its S or E port and do what you are trying to do - which is get a dynamically assigned address, and share that connection using NAT.

Perhaps if you connected the WAN connection link to a ehternet port on the 2500, and configured it with an IP config that matches what your ISP gives you, and set up routes to forward.

I dunno, I'm just a caveman with IOS trauma.

How many E ports do you have on yer router?

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quote:

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Originally posted by NewTecker
What is the exact 2500 series router you have? 2501? 2514? 2524? 25xx. Some 2500 series routers have RJ-45 jacks for the ethernet connections. I used to have a 2524 that had single RJ-45 jack instead of the AUI port. The 2505 router comes with a 8 port hub with 8 RJ-45 Jacks. If your router has a AUI port on then you get the AUI transceiver and connect it to those.

Now of course if you have only a single ethernet port port I suppose you could connect your cable modem directly to a hub or switch along with the router and all the other devices on the LAN. Then assign each device on the LAN an IP address and the default gateway to a sub interface on the ethernet port. Then have the another sub interface on the ethernet interface assigned an IP from the ISP.

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yes, you can.

I have 2514 and I used it back when I had cable internet. make sure you have IOS 12.x so it can support NAT. I have e0 connected to the cable modem and recieved the ip via cable modem dhcp and e1 was my home dhcp server and NAT.

so I know for sure 2514 will go nat and be better then any broadband router you can buy that compUSA.

Unfortunatly I could not get my router to play nice with my MSN dsl.

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Now I can't decide if I want to try what xakeP says or just get the Cisco uBR. I do not know how to set up NAT on the IOS yet, though.

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