Chapter 15: Configuring Ip Information; Management And Ip Interfaces - Cisco 200 Series Administration Manual

Configuring IP Information

Management and IP Interfaces

Cisco Small Business 200 Series Smart Switch Administration Guide
IP interface addresses are configured manually by the user, or auto-configured by
a DHCP server. This chapter provides information for defining the switch IP
addresses.
It includes the following topics:
• Management and IP Interfaces
• Configuring ARP
• Domain Name Systems
IP Addressing
The factory default setting of the IP address configuration is DHCP. This means
that the switch acts as a DHCP client, and sends out a DHCP request during boot
up.
If the switch receives a DHCP response from the DHCP server with an IP address,
it sends Address Resolution Protocol (ARP) packets to confirm that the IP address
is unique. If the ARP response shows that the IP address is in use, the switch sends
a DHCPDECLINE message to the offering DHCP server, and sends another
DHCPDISCOVER packet that restarts the process.
If the switch does not receive a DHCP response in 60 seconds, it continues to
send DHCPDISCOVER queries, and adopts the default IP address: 192. 1 68. 1 .254/
24.
IP address collisions occur when the same IP address is used in the same IP
subnet by more than one device. Address collisions require administrative actions
on the DHCP server and/or the devices that collide with the switch.
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