Installation guide

Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards

How to Configure EtherSwitch HWICs

Cisco IOS Release 12.3(8)T4

OL-6454-01

Beginning in global configuration mode, follow these steps to remove an IP address.

SUMMARY STEPS

1. interface vlan 1

2. no ip address

3. end

DETAILED STEPS

Caution If you are removing the IP address through a telnet session, your connection to the switch

will be lost.

Specifying a Domain Name and Configuring the DNS

Each unique IP address can have a host name associated with it. The Cisco IOS software maintains a EC

mode, and related Telnet support operations. This cache speeds the process of converting names to

addresses.

IP defines a hierarchical naming scheme that allows a device to be identified by its location or domain.

Domain names are pieced together with periods (.) as the delimiting characters. For example, Cisco

Systems is a commercial organization that IP identifies by a com domain name, so its domain name is

cisco.com. A specific device in this domain, the FTP system, for example, is identified as ftp.cisco.com.

To track domain names, IP has defined the concept of a domain name server (DNS), the purpose of which

is to hold a cache (or database) of names mapped to IP addresses. To map domain names to IP addresses,

you must first identify the host names and then specify a name server and enable the DNS, the Internet’s

global naming scheme that uniquely identifies network devices.

Specifying the Domain Name

You can specify a default domain name that the software uses to complete domain name requests. You

can specify either a single domain name or a list of domain names. When you specify a domain name,

any IP host name without a domain name has that domain name appended to it before being added to the

host table.

Specifying a Name Server

You can specify up to six hosts that can function as a name server to supply name information for the

DNS.

Command Purpose

Step 1

Router(config)# interface vlan 1

Enters interface configuration mode, and enters the VLAN to

which the IP information is assigned.

VLAN 1 is the management VLAN, but you can configure any

VLAN from IDs 1 to 1001.

Step 2

Router(config-subif)# no ip address

Removes the IP address and subnet mask.

Step 3

Router(config-subif)# end

Returns to privileged EXEC mode.