Installation and Getting Started Guide

5.Enter the IP address in the IP address field.

6.Enter the sub-net mask in the Subnet Mask field.

7.Enter the default gateway’s IP address in the Default Gateway field.

8.Click the Apply button to save the change to the device’s running-config file.

9.Select the Save link at the bottom of the dialog. Select Yes when prompted to save the configuration change to the startup-config file on the device’s flash memory.

Configuring Domain Name Server (DNS) Resolver

The Domain Name Server (DNS) resolver feature lets you use a host name to perform Telnet, ping, and traceroute commands. You can also define a DNS domain on the device and thereby recognize all hosts within that domain. After you define a domain name, the device automatically appends the appropriate domain to the host and forwards it to the domain name server.

For example, if the domain “newyork.com” is defined on a device and you want to initiate a ping to host “NYC01” on that domain, you need to reference only the host name in the command instead of the host name and its domain name. For example, you could enter either of the following commands to initiate the ping:

HP6208# ping nyc01

HP6208# ping nyc01.newyork.com

Defining a DNS Entry

You can define up to four DNS servers for each DNS entry. The first entry serves as the primary default address. If a query to the primary address fails to be resolved after three attempts, the next gateway address is queried (also up to three times). This process continues for each defined gateway address until the query is resolved. The order in which the default gateway addresses are polled is the same as the order in which you enter them.

USING THE CLI

Suppose you want to define the domain name of newyork.com on the HP 6208M-SX and then define four possible default DNS gateway addresses. To do so, enter the following commands:

HP6208(config)# ip dns domain-name newyork.com

HP6208(config)# ip dns server-address 209.157.22.199 205.96.7.15 208.95.7.25 201.98.7.15

Syntax: ip dns server-address <ip-addr> [<ip-addr>] [<ip-addr>] [<ip-addr>]

In this example, the first IP address in the ip dns server-address...command becomes the primary gateway address and all others are secondary addresses. Because IP address 201.98.7.15 is the last address listed, it is also the last address consulted to resolve a query.

USING THE WEB MANAGEMENT INTERFACE

To map a domain name server to multiple IP addresses:

1.Log on to the device using a valid user name and password for read-write access. The System configuration panel is displayed.

2.Do one of the following:

•On the HP 6208M-SX – Select the DNS link to display the DNS panel.

•On a routing switch – Click on the plus sign next to Configure in the tree view, then click on the plus sign next to IP, then select DNS to display the DNS panel.

3.Enter the domain name in the Domain Name field.

4.Enter an IP address for each device that will serve as a gateway to the domain name server.

NOTE: The first address entered will be the primary DNS gateway address. The other addresses will be used in chronological order, left to right, if the primary address is available.

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