The difference is with the cable network, TelstraClear own the cable modem and present you with an RJ45 ethernet port (or cable, not sure which). The 827 only has one ethernet port, so you have to have your internal and external network on the same segment. As Philip mentioned, you won't be able to run NAT as it's going in and out the same logical/sub interface. Things like firewalling will be a bit suspect having the two networks on the same segment, but as a token gesture, it works :).

With ADSL on the 827, you use two ports (the ADSL port and the ethernet port), hence you get proper separation of networks so firewalling and NAT and others work properly.

Cheers,

Chris

> -----Original Message-----
> From: Keith & Deby [mailto:camaro69@xtra.co.nz]
> Sent: Tuesday, January 21, 2003 6:58 PM
> To: Philip D'Ath; rdawson@xtra.co.nz; adsl@lists.unixathome.org
> Subject: Re: CISCO 827 question.
>
>
> I have a 827, forgive me as Im still trying to get my head
> around cisco.
> We are on adsl with 6 machines conected, serving on
> occasions, ftp, gaming,
> rodger wilco, from several of the machines with the ports
> req'd opened to
> the machine that runs the server.
> I dont understand why the 827 couldnt also be used on cable
> in the same way.
> ----- Original Message -----
> From: "Philip D'Ath" <pid@ifm.net.nz>
> To: <rdawson@xtra.co.nz>; <adsl@lists.unixathome.org>
> Sent: Tuesday, January 21, 2003 5:06 PM
> Subject: RE: CISCO 827 question.
>
>
> > DHCP, yes.
> > NAT, no. The NAT code only activates when a packet traverses from
> > one interface to another. Your packets would be going in
> the Ethernet
> > interface, and straight back out again.
> >
> > -----Original Message-----
> > From: owner-adsl@unixathome.org
> [mailto:owner-adsl@unixathome.org] On
> Behalf
> > Of Ross Dawson
> > Sent: Tuesday, 21 January 2003 4:42 p.m.
> > To: adsl@lists.unixathome.org
> > Subject: CISCO 827 question.
> >
> >
> > Hi All.
> >
> > I have a spare CISCO 827 router, and I have the following question.
> >
> > Background:
> >
> > I am now on cable modem, hence don't need the CISCO 827 as a modem
> anymore.
> >
> > THE QUESTION:
> >
> > Can I use the Cisco 827 as a router for my cable modem,
> thus picking up
> it's
> > dhcp and nat/natpt functions.
> >
> >
> >
> > --
> > This message is part of the NZ ADSL mailing list.
> > see http://unixathome.org/adsl/ for archives, FAQ,
> > and various documents.
> > To unsubscribe: send mail to majordomo@lists.unixathome.org
> > with "unsubscribe adsl" in the body of the message
> >
>
> --
> This message is part of the NZ ADSL mailing list.
> see http://unixathome.org/adsl/ for archives, FAQ,
> and various documents.
> To unsubscribe: send mail to majordomo@lists.unixathome.org
> with "unsubscribe adsl" in the body of the message
>
>
>

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