Re: Anyone using Arris Cornerstone 1000?

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On Tue, 2003-01-28 at 15:49, Justin Ellison wrote:
> CPE --------- CM -------------- CMTS ------ Switch ----- DHCP 
> 1.2.3.5           10.90.0.5           1.2.3.4         |       1.2.3.2
>                                               |       10.90.0.1
>                                               |
>                                               |
>                                            Router 1.2.3.1
>                                               |
>                                               |
>                                            Internet
> 
> I assigned 2 addresses to the Linux box, one globally routable, one
> private network.  
> 
> I assumed that the dhcp server would see the destination IP, and assign
> a subnet related to that, but it appears as though it's looking at the
> gateway. 
I use a 3com cmts but here is my experience:

The way I've got mine setup is basically the same way.  But my CMTS has
2 ip addresses (the cm address-private and the cpe address-public). 
They relay to one ip address for the DHCP server which is setup the same
way as yours, and it gives them is based on the address relaying.

> subnet 1.2.3.0 netmask 255.255.255.192 {  #CPE Network
>       default-lease-time 14400; # 4 hour lease on non-static IP's
>       max-lease-time 28800; # 8 hour max lease
>       filename "noaccess.cm";
>       range xxx.xxx.xxx.xxx xxx.xxx.xxx.xxx;
>       option subnet-mask 255.255.255.192;
>       option routers 1.2.3.1;
> }     # CPE Network
> } # end CPE Shared Network    
so in this case my cpe addy would be 1.2.3.1 as the router/relay point

> # This is the CM network      
> subnet 10.90.0.0 netmask 255.255.0.0 {
>       range 10.90.0.5 10.90.255.254;
>       option subnet-mask 255.255.0.0;
>       option broadcast-address 10.90.255.255;
>       filename "noaccess.cm";
>       option tftp-server-name "x.x.x.35"; 
>       option time-servers x.x.x.35; }
and in this case my cm addy would be 10.90.0.1 as my router/relay point


> tcpdump shows that the destination changes, but source stays the same. 
> If I could assign ip aliases to this CMTS, I'm sure that I could make it
> work.  It's working, it's just that I don't want my cable modems sitting
> on routable IP's.  Anyone have any idea's?  My tcpdump is below:
You might look at how your CMTS assigns addresses to the QAM interface..
it should have a way to specify a Modem default gateway and a User
default gateway, and even a 3rd interface for the ethernet interface.

just an idea.


-- 
Greg <gsml@xxxxxxxxxxxxxxx>


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