Specifications

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Cisco AS5x00 Case Study for Basic IP Modem Services
11/24/1999
Section 3 Commissioning the Cisco AS5800 Hardware
Testing Asynchronous EXEC Shell Connections
Step 2
Enter domain-name service global configuration commands to support EXEC shell users:
ip domain-lookup
ip host dirt 172.22.100.9
ip domain-name the.net
ip name-server 172.22.11.10
ip name-server 172.22.12.10
Table 3-10 describes the previous commands:
Task 7. Testing Asynchronous EXEC Shell Connections
This task verifies that the following components are working:

The physical asynchronous data path

Basic modem links

Basic IP functionality to support EXEC shell sessions
The Cisco IOS provides a command-line interface (CLI) called the EXEC.
The EXEC:

Can be accessed by dialing in with a modem

Provides access to terminal EXEC shell services (no PPP) to do the following:
`
Modify configuration files
`
Change passwords
`
Troubleshoot possible problems including modem connections
`
Access other network resources by using telnet
During this task, some administrators try to make complex services function such as PPP-based Web
browsing. Do not jump ahead. Many other elements still need to be configured (for example, PPP and
IPCP). The asynchronous-shell test ensures that the EXEC’s login prompt can be accessed by a client
modem. Taking a layered approach to building a network isolates problems and saves you time.
Note
The Cisco AS5800 is designed to process PPP sessions. To support high ratios of
EXEC-shell users or V.120 users, work with your assistance support team.
Table 3-10 Domain-Name Commands
Command Purpose
ip domain-lookup
Enables IP domain-name lookups.
ip host dirt 172.22.100.9
Creates a local name-to-address map. When the NAS is not
entered in a DNS server, this map is useful.
ip domain-name the.net
Tells the NAS how to qualify DNS look ups. In this example,
the.net is appended to the end of each name that is looked up.
ip name-server 172.22.11.10
ip name-server 172.22.12.10
Specifies the primary and secondary name servers. They are used
for mapping names to IP addresses.