Multiple ethernets on one cable modem

[NKavanagh at psgroup.com (Niall Kavanagh)]

Okay, so the modem is doing the filtering based on the MAC that YOUR NIC
reports to it, not some M1X database? I think that's where I was confused. I
thought people were saying the modems were smart enough to query a list
somewhere and decide if it's an "authorized" MAC.

So if I throw in a new NIC, power cycle the modem so it picks up the new
MAC, will I still be able to get an IP address?

Sorry if I'm starting to bug you. I'm starting to irritate myself. ;)

FYI, I'm pretty sure Derek is back online. His DNS record update went
through yesterday, so if he's subscribed via his @netria.com address he
should be getting mail there. I'm not sure if his work email is working yet
though.

And thanks to all who are enlightening me!

Niall

> -----Original Message-----
> From: Jerry Feldman {75562} [mailto:gzf at gbrmail.msd.ray.com]
> Sent: Thursday, December 02, 1999 8:53 AM
> Cc: 'discuss at blu.org'
> Subject: Re: Multiple ethernets on one cable modem
> 
> 
> Niall Kavanagh wrote:
> 
> > MediaOne SAYS they require your MAC address before things get up and
> > running.
> > 
> > If this is the case, and according to the information we've 
> tossed around so
> > far, new devices with invalid MACs will not have their 
> packets forwarded by
> > the modem?
> That is correct. M1X will not let any traffic through unless 
> it has the
> registered MAC address. If you change MAC addresses, M1X will 
> also assign
> you a new IP address. I don't know the extent of the code in the cable
> modem. Unfortunately, Derek Martin's email has had some 
> problems, and may
> not get to him. When I switched NICS a while back, it took 
> about 5 mins for
> the tech to update the database. At that time it took a few 
> days for the new
> IP address to get into the DNS server, but I think that they have this
> process more under control these days. 
> 
> -- 
> Jerry Feldman (HP On-Site Consultant) http://gbrweb.msd.ray.com/~gzf/
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