[nsp] Docsic Cable modem / Cisco cmts ubr 7246

[Scott Morris]

If the customer is assigning the Ips themselves, then you really have
two options:

Configure your DHCP with static assignments to the customer's IP anyway
and use the cable source-verify dhcp command as before (this will be a
pain because you'll need to update any time they change the MAC address
of the box their IP is assigned to).

Or

Put an access-list or something on the cable modem (will depend on the
specifics of the CM, I know nothing about Surfboards) to limit only that
IP that you assign, and pass that as a secondary config file through the
docsis config.

That's about the only way I can think of for manually handed out Ips.
It would a LOT easier if you did everything through a DHCP server.  Is
there any reason that you aren't runnning a DHCP server to handle all of
these assignments?

Scott

-----Original Message-----
From: cisco-nsp-admin@puck.nether.net
[mailto:cisco-nsp-admin@puck.nether.net] On Behalf Of Raj P Panchal
Sent: Monday, October 14, 2002 2:51 AM
To: Scott Morris
Cc: cisco-nsp@puck.nether.net
Subject: Re: RE: [nsp] Docsic Cable modem / Cisco cmts ubr 7246


Hi scott
I am not using dhcp to assingn ip to the customer. I want to 
assign ip on the pc itself . and i want to set restriction that 
only that ip is is able to access the network through that 
particular cable modem . if the customer replaces / changes the 
modem or ip it should not work
thanks
raj

On Sun, 13 Oct 2002 Scott Morris wrote :
>In the config file, you can set max-cpe to 1.  Otherwise, if you
>want to
>control per PC, you can make the restrictions on the DHCP 
>server-side
>(limit to "known" MAC address (manual config)).  You may be able 
>to set
>individual filters up on the cable modems, but it'll depend on 
>their
>capabilities and specified in the additional filename (in the 
>docsis
>config).
>
>Also, if you have controlled it via the max-cpe 1 and know that 
>everything is supposed to register with your DHCP server to get it's 
>IP, on the CMTS, if you use the "cable source-verify dhcp", your CMTS
>will
>validate through the DHCP server any new IP address that comes 
>through
>the upstream to make sure someone isn't just hocking an unused 
>IP.
>
>Hope that helps,
>
>Scott
>
>-----Original Message-----
> From: cisco-nsp-admin@puck.nether.net 
>[mailto:cisco-nsp-admin@puck.nether.net] On Behalf Of Raj P Panchal
>Sent: Sunday, October 13, 2002 3:06 AM
>To: cisco-nsp@puck.nether.net
>Subject: [nsp] Docsic Cable modem / Cisco cmts ubr 7246
>
>
>dear all,
>I am using docsis 1.0 surfboard cable modem . I am using Cisco ubr7246 
>cmts . The cable modem configuration file is created using
>Cisco docsis cpe configurator v3.6 . I would like to restrict
>access to Internet through the cable modem from only particular
>cpe ( pc ) with particular ip address . can any one help me out
>how to do that ???
>
>thanks
>raj
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