3Com REMOTE ACCESS SYSTEM 1500, Management Manual

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72 C
HAPTER
6: C
ONFIGURING
N
ETWORK
D
IAL
-I
N
IP Addresses You may specify an IP address for your remote computer during the
session. If RAS 1500 is configured to negotiate an IP address with the
remote computer, RAS 1500 automatically detects this address.
If the remote computer does not have an IP address configured and the
address selection type is negotiate, RAS 1500 terminates the call.
Configuring
RAS 1500
You need to perform the following actions to configure RAS 1500 for
network dial-in:
Required Steps
1
Configure IP address pools.
2 Configure IP network users.
Optional Steps
3 Configure PPP parameters for network users.
4 Configure additional dial-up parameters.
IP Address Pool
Overview
RAS 1500 has an option to dynamically assign IP addresses to dial in
network users from a pool each time they connect. This is done on RAS
1500 by configuring IP address pools.
RAS 1500 bundles several IP addresses into one to limit Routing
Information Protocol (RIP) advertisements. The IP pool is created as a
range, starting from an initial address. As PPP users dial in, IP allocates
addresses from this pool and assigns them to users.
Users assigned to more than one pool receive an address from the last
assigned pool in round-robin fashion. As a safeguard, if the administrator
reduces the size of the pool, users who are deleted will not be denied
access until after their calls have terminated.