Cisco Routers and ADSL/Cable connections.

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3nvy

104 posts

Master Geek

#20936 10-Apr-2008 16:52

Hi everyone,

Before I begin I've gotta point out that my knowledge of Cisco routers and Cisco router scripting is VERY limited.

Now, today I had some basic training in setting up and configuring a Cisco router. We were run through the difference between different models, some having an ADSL connection and the others having ethernet connections.

One of the guys mentioned that the dialer interface was pretty much interchangable between both models, which got me thinking.

What would stop you from assigning the dialer script (assuming you've created the correct PPoA and PPoE settings in the ATM interface) to any of the ethernet ports on the inbuilt switch.

Would this not allow you have to an ethernet dialer interface and an ADSL dialer interface on the same unit?

This... probably doesn't make any sense. Im struggling to get across the concepts and ideas we just discussed.

Thanks guys,

igi

6 posts

Wannabe Geek

#122654 10-Apr-2008 20:03

If you wish to do that you certainly can. A dialer interface is a logical interface which you configure how to "dial" and how to authenticate/authorize to become active. The physical interfaces are selected through the pool-membership. The physical interfaces can be pretty much anything, Serial, BRI, ATM, Ethernet, etc.
If you have several different connections to the SP, you can of course configure all of them (e.g. PPPoE to a ADSL modem or PPPoA on the ATM VC). If the dialer parameters are all the same, you can even put them into the same pool for the dialer interface. If different credentials are required use mutliple dialer interfaces. In the later case you have to tell the router which interface to use by routing - for example, all IPv4 traffic through one interface and all IPv6 through the other or 0.0.0.0/1 through one and 128.0.0.0/1 through the other (just an example).
So it does make sense what you thought about. You just need to know how to use the multiple connections.

3nvy

104 posts

Master Geek

#122761 11-Apr-2008 08:49

So, just to clarify...

You could in effect, buy the model with an ADSL interface and use it to connect to a cable connection (via ethernet)?

igi

6 posts

Wannabe Geek

#122772 11-Apr-2008 09:21

Provided you got the software that supports PPPoE - yes.

I think it requires an "advanced Feature set" (you probably know that Cisco routers can run different software (depending on the $ you want to spend) providing different features).

3nvy

104 posts

Master Geek

#122798 11-Apr-2008 11:05

Thats pretty damn sweet.

I hear its a mission to set up a redundancy between two connections though, which is a shame.