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Cisco ME 3400 EthernetAccess Switch SoftwareConfiguration Guide
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Chapter32 Configuring IP Unicast Routing Configuring IP Addressing
Assigning IP Addresses to Network Interfaces
An IP address identifies a location to which IP packets can be sent. Some IP addresses are reserved for
special uses and cannot be used for host, subnet, or network add resses. RFC 1166, “Internet Numbers,”
contains the official description of IP addresses.
An interface can have one primary IP address. A mask identifies the bits that denote the netw ork number
in an IP address. When you use the mask to subnet a network, the mask is referr ed to as a subn et mas k.
To receive an assigned network number, contact your Internet service provider.
Beginning in privileged EXEC mode, follow these steps to assign an IP address and a network mask to
a Layer 3 interface:
IRDP Disabled.
Defaults when enabled:
•Broadcast IRDP advertisements.
•Maximum interval between advertisements: 600 seconds.
•Minimum interval between advertisements: 0.75 times max interval
•Preference: 0.
IP proxy ARP Enabled.
IP routing Disabled.
IP subnet-zero Disabled.
Table32-1 Default Addressing Configuration (continued)
Feature Default Setting
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 interface interface-id Enter interface configuration mode, and specify the Layer 3
interface to configure.
Step3 no shutdown Enable the interface if necessary. User network interfaces
(UNIs) are disabled by default; network node interfaces (NNIs)
are enabled by default.
Step4 no switchport Remove the interface fr om Layer 2 c onf igura tion mode ( if it is a
physical interface).
Step5 ip address ip-address subnet-mask Configure the IP address and IP subnet mask.
Step6 end Return to privileged EXEC mode.
Step7 show interfaces [interface-id]
show ip interface [interface-id]
show running-config interface [interface-id]
Verify your entries.
Step8 copy running-config startup-config (Optional) Save your entries in the configuration file.