On 1 Jun 99, at 8:24, Kit Mitchell wrote:

> _An_ explanation for IP changes has certainly been given but there are a
> couple of points I seem to either misunderstand or not follow. The MAC
> address should be the physical address of the network device e.g a network
> card. The modem DSL/ATM interface lacks a physical address. So it would
> seem that the storing physical addresses to match to IPs is not what
> happens.

Yes, that was my understanding of the explanation. Why the matching
cannot be stored is interesting.

> Address assignment seems to me to be likely to be via PPP as that is part
> of what PPP can do I thought.

My understanding as well.

>
> On Locking of th modem - did my previous post with the log show up or
> should I resend it.

It showed up.

> It seems that if the modem fails to clear its IP
> address when it renegotiates for any reason then it may be unable to
> accept the IP given by the RAN. This will indeed prevent IP connectivity
> which may very well be described as "locked out " For me it was not the
> crossover per se that suggested that the IP could get stuck but
> observation of the log during a number of resets soft restarts and
> powerdowns - all of which cause the IP to be renegotiated. Not always to
> the same one - the reset ppp I just did gave me yet another IP address.
> however it did get one this time which was not the case on the first
> renegotiation subsequent to the change.

I'm not sure what you mean by crossover.

> Stephen, if some one has physical access to the modem then power down and
> on again should clear the old IP and allow it to renegotiate correctly.

Not that Stephen will then know the IP address. Stephen have you
looked into the dynamic DNS stuff yet?

--
Dan Langille - DVL Software Limited
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