16
Cisco 350XG & 550XG Series 10G Stackable Managed Switches
307
IP Configuration
IP interface addresses can be configured manually by the user, or automatically
configured by a DHCP server. This section provides information for defining the
device IP addresses, either manually or by making the device a DHCP client.
This section covers the following topics:
•
•
IPv4 Management and Interfaces
•
IPv6 Management and Interfaces
•
Overview
The MTU for traffic is limited to 9000 bytes.
The factory default setting of the IPv4 address configuration is
DHCPv4
. This
means that the device acts as a DHCPv4 client, and sends out a DHCPv4 request
during boot up.
If the device receives a DHCPv4 response from the DHCPv4 server with an IPv4
address, it sends Address Resolution Protocol (ARP) packets to confirm that the IP
address is unique. If the ARP response shows that the IPv4 address is in use, the
device sends a DHCPDECLINE message to the offering DHCP server, and sends
another DHCPDISCOVER packet that restarts the process.
If the device does not receive a DHCPv4 response in 60 seconds, it continues to
send DHCPDISCOVER queries, and adopts the default IPv4 address:
192.168.1.254/24.
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 device.
