Technical data

5-6 Dial Solutions Quick Configuration Guide
Configuring Point-to-Point Protocol (PPP) Access
You also must configure the client software on client PCs to obtain IP addresses from a DHCP server.
Refer to the documentation that accompanied the PC client software for more information about
configuring IP addressing options.
For a comprehensive configuration example for PPP dialing to an IP network, refer to the section
“Dial-In Configuration Examples” later in this chapter.
Method 3: Assign Static IP Addresses to Each PC
To configure the access server to statically define IP addresses to each client dialing in to the
network, enter interface configuration mode and issue the peer default ip address address
command, as shown in the following example:
2511(config)# interface async 1
2511(config-if)# peer default ip-address 172.16.42.26
Note To prevent duplicate IP addresses from being assigned on two or more interfaces, you cannot
assign a static IP address to a group asynchronous interface. A single IP address on a group
asynchronous interface permits assignment of the same address to more than one dial-in client. For
the same reason, this command also cannot be applied to dialer rotary groups or to ISDN interfaces.
The IP address you assign must be the same as the address specified on the remote dial-in client.
Refer to the documentation that accompanied the PC client software for more information about
configuring IP addressing options.
For a comprehensive configuration example for PPP dialing to an IP network, refer to the section
“Dial-In Configuration Examples” later in this chapter.
Configuring Other IP Dial-in Parameters
Though optional, you generally identify the IP domain name and IP name server on the LAN
segment, as shown in the following example:
2511(config)# ip domain-name eapp.com
2511(config)# ip name-server charlatan
Table 5-1 lists other parameters that are often useful for administrators configuring IP dial-in using
PPP.
Caution If you have configured network protocol support, PPP encapsulation, and an IP addressing
method, IP clients can dial in to your network. Ensure that you configure security, as described in
the chapter “Security Configuration” in this guide. Also, the configuration examples at the end of
this chapter show IP configuration examples with security.
Table 5-1 Additional PPP Dial-in Parameters
Command Purpose
ip tcp header-compression passive (interface
configuration command)
Instructs the access server port to perform compression of
TCP headers if requested by the client.
asynchronous dynamic address (interface
configuration command)
(IP only.) Enables the client to select an IP address
dynamically when dialing in.