Cisco Catalyst 3550 Command Reference Manual page 127

Chapter 2 Cisco IOS Commands
If your switch receives its IP address from a Bootstrap Protocol (BOOTP) or Dynamic Host
Configuration Protocol (DHCP) server and you remove the switch IP address by using the no ip address
command, IP processing is disabled, and the BOOTP or DHCP server cannot reassign the address.
A Layer 3 switch can have an IP address assigned to each routed port and SVI. The number of routed
ports and SVIs that you can configure is not limited by software; however, the interrelationship between
this number and the number of other features being configured might have an impact on CPU utilization
due to hardware limitations. You can use the sdm prefer global configuration command to reallocate
system hardware resources based on templates and feature tables. For the Catalyst 3550 Gigabit Ethernet
switches, the tables are based on 16 routed interfaces (SVIs and routed ports. For switches with mainly
Fast Ethernet ports, the tables are based on 8 routed interfaces. For more information, see the
command.
Examples
This example shows how to configure the IP address for the Layer 2 switch on a subnetted network:
Switch(config)# interface vlan 1
Switch(config-if)# ip address 172.20.128.2 255.255.255.0
This example shows how to configure the IP address for a port on the Layer 3 switch:
Switch(config)# ip multicast-routing
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# no switchport
Switch(config-if)# ip address 172.20.128.2 255.255.255.0
You can verify your settings by entering the show running-config privileged EXEC command.
Related Commands Command
show running-config
78-11195-09
Description
Displays the running configuration on the switch. For syntax information,
select Cisco IOS Configuration Fundamentals Command Reference for
Release 12.1 > Cisco IOS File Management Commands > Configuration
File Commands.
Catalyst 3550 Multilayer Switch Command Reference
ip address
sdm prefer
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