Technical data
Cisco AS5300 Configuration 2-27
Step 8—Setting Up IP Address Pools
Step 8—Setting Up IP Address Pools
Create a pool of IP address to support remote nodes dialing in. As remote node devices connect, they
request an IP address from the central site.
It is important to determine how your intranet/Internet backbone will route packets to the addresses
in this pool. There are several ways to do this, such as using addresses off a subnet defined on the
access server (for example, on the loopback or Ethernet interface).
Note Administrators commonly create a loopback interface and new subnet if their existing
Ethernet subnet has all its IP addresses already consumed. Loopback interfaces are very stable and
do not go up and down as LAN interfaces may.
Configure
To set up the address pool, use the following commands beginning in global configuration mode:
Verify
Enter the show ip local pool command to verify the configuration:
hq-sanjose# show ip local pool
Pool Begin End Free In use Cache Size
dialin_pool 10.1.2.2 10.1.2.97 96 0 20
Step Command Purpose
1
hq-sanjose(config)# interface loopback 0
Create loopback interface 0.
2
hq-sanjose(config-if)# ip address 10.1.2.1 255.255.255.0
Assign an IP subnet and address
to loopback 0. This subnet is
used for the creation of your IP
address pool
1
.
1. This subnet is now dedicated to this Cisco AS5300 for remote node support. This subnet cannot be used in other places in your network.
3
hq-sanjose(config-if)# exit
Exit back to global
configuration mode.
4
hq-sanjose(config)# ip local pool dialin_pool 10.1.2.2 10.1.2.97
Create a pool of IP addresses for
assigning to the remote nodes
2
.
2. A remote LAN is typically a router that has a next hop address and its own IP subnet. It also requires IP routing support from the backbone, which is commonly
accomplished with a static IP route. A remote node gets an IP address out of a central pool of IP addresses. Remote LANs and remote nodes are primarily
differentiated by this IP addressing scheme. Remote LANs can appear as remote nodes by using PAT.
5
hq-sanjose(config)# async-bootp dns-server 10.2.2.3 10.2.3.1
Specify the domain name
servers on the network, which
can be used for clients dialing in
with PPP.