[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Dynamic IP
On Wed, 28 May 1997 Gilad_Gam@vocaltec.com wrote:
> I think what Ira was referring to was the allocation of fixed addresses
> from the _server's_ side. You, as a client, connects to a different modem
> every time you call, so it still seems to be dynamic IP. If Netvision were
> to give _you_ a fixed ip address, it would means a completely different
> setup than that, hence the bloated price (I think they give you an address
> in a completely different class c than the ones used by the modem pools).
you're quite right in this sence. it seems that there are few waysfor
providers to assign IP addresses for PPP/SLIP connections.
1. assinging a fixed IP address per MODEM. the customer gets a different
IP address on each call.
2. assigning a pool of IP addresses using a DHCP server, in which case
the IP addresses are not fixed even per modem. again the customer sees
a different IP on each connection. as far as i know, IBM uses this
method, or at least used it in the past.
3. assigning fixed IP per customer - this is a rare phenomena, since these
days its quite hard to get enough networks to provide the demands. this
method wastes a lot of IP addresses (about an order of magnitude), and
is VERY problematic if one needs to renumber (i.e. move to a new set of
IP networks due to switching to a different provider).
excuse me for making a 'publicity stunt' here, but the fixed IP addresses
service does exist at some places (at least the one i know is actcom, but,
well.. i know, i'm biased). i think the netvision service you described
gives you a full class-C (or a chunk of it) for a dial-up conenction of a
network, not a fixed IP for a single computer.
guy