C
HAPTER
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| Initial Switch Configuration
Basic Configuration
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ASSIGNING AN IPV4 ADDRESS
Before you can assign an IP address to the switch, you must obtain the
following information from your network administrator:
◆ IP address for the switch
◆ Network mask for this network
◆ Default gateway for the network
To assign an IPv4 address to the switch, complete the following steps
1. From the Global Configuration mode prompt, type “interface vlan 1” to
access the interface-configuration mode. Press <Enter>.
2. Type “ip address ip-address netmask,” where “ip-address” is the switch
IP address and “netmask” is the network mask for the network. Press
<Enter>.
3. Type “exit” to return to the global configuration mode prompt. Press
<Enter>.
4. To set the IP address of the default gateway for the network to which
the switch belongs, type “ip default-gateway gateway,” where
“gateway” is the IP address of the default gateway. Press <Enter>.
Console(config)#interface vlan 1
Console(config-if)#ip address 192.168.1.5 255.255.255.0
Console(config-if)#exit
Console(config)#ip default-gateway 192.168.1.254
ASSIGNING AN IPV6 ADDRESS
This section describes how to configure a “link local” address for
connectivity within the local subnet only, and also how to configure a
“global unicast” address, including a network prefix for use on a multi-
segment network and the host portion of the address.
An IPv6 prefix or address must be formatted according to RFC 2373 “IPv6
Addressing Architecture,” using 8 colon-separated 16-bit hexadecimal
values. One double colon may be used to indicate the appropriate number
of zeros required to fill the undefined fields. For detailed information on the
other ways to assign IPv6 addresses, see "Setting the Switch’s IP Address
(IP Version 6)" on page 568.
Link Local Address — All link-local addresses must be configured with a
prefix in the range of FE80~FEBF. Remember that this address type makes
the switch accessible over IPv6 for all devices attached to the same local
subnet only. Also, if the switch detects that the address you configured
conflicts with that in use by another device on the subnet, it will stop using
the address in question, and automatically generate a link local address
that does not conflict with any other devices on the local subnet.
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