Specifications

Configuring Asynchronous Lines and Interfaces
Configuration Examples for Asynchronous Interfaces and Lines
DC-39
Cisco IOS Dial Technologies Configuration Guide
High-Density Dial-In Solution Using an Asynchronous Group
The following example configures a Cisco AS5800 access server that is used as a high-density dial-in
solution:
interface group-async 0
ip unnumbered FastEthernet0/2/0
encapsulation ppp
async mode interactive
peer default ip address pool default
no cdp enable
ppp authentication chap
hold-queue 10 in
group-range 1/2/00 1/9/71
Asynchronous Interface Address Pool Examples
The following sections provide examples of the use of Dynamic Host Configuration Protocol (DHCP)
and local pooling mechanisms:
• DHCP Pooling Example
• Local Pooling Example
• Configuring Specific IP Addresses for an Interface
DHCP Pooling Example
The following global configuration example enables DHCP proxy-client status on all asynchronous
interfaces on the access server:
ip address-pool dhcp-proxy-client
The following global configuration example shows how to specify which DHCP servers are used on your
network. You can specify up to four servers using IP addresses or names. If you do not specify servers,
the default is to use the IP limited broadcast address of 255.255.255.255 for transactions with any and
all discovered DHCP servers.
ip dhcp-server jones smith wesson
The following interface configuration example illustrates how to disable DHCP proxy-client
functionality on asynchronous interface 1:
async interface
interface 1
no peer default ip address
Local Pooling Example
The following example shows how to select the IP pooling mechanism and how to create a pool of local
IP addresses that are used when a client dials in on an asynchronous line. The default address pool
comprises IP addresses 172.30.0.1 through 172.30.0.28.
! This command tells the access server to use a local pool.