Table of Contents
Advertisement
Linksys
Chapter 10 IP Interface
IP Interface
This section describes IP interfaces and covers the following topics:
•
IPv4
•
IPv6
IPv4
This section describes IPv4 configuration . It covers the following topics:
•
Overview
Overview
Layer 2 IP Addressing
The device has one IPv4 address and up to two IPv6 interfaces in the
management VLAN . This IP address and the default gateway can be configured
manually, or by DHCP . The static IP address and default gateway are configured
on the IPv4 Interface page . The device uses the default gateway, if configured, to
communicate with devices that are not in the same IP subnet as the device . By
default, VLAN 1 is the management VLAN, but this can be modified . The device
can only be reached at the configured IP address through its management VLAN .
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 . 1 68 . 1 .251/24 .
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 .
When a VLAN is configured to use dynamic IP addresses, the device issues
DHCPv4 requests until it is assigned an IPv4 address from a DHCPv4 server . The
management VLAN can be configured with a static or dynamic IP address .
The IP address assignment rules for the device are as follows:
Unless the device is configured with a static IPv4 address, it issues
•
•
DHCPv4 queries until a response is received from a DHCPv4 server .
If the IP address on the device is changed, the device issues gratuitous ARP
•
packets to the corresponding VLAN to check IP address collisions . This rule
also applies when the device reverts to the default IP address .
The system status LED changes to solid blue when a new unique IP address is
•
received from the DHCP server . If a static IP address has been set, the system
status LED also changes to solid blue . The LED flashes when the device is
acquiring an IP address and is currently using the factory default IP address
192 . 1 68 . 1 . 251 .
The same rules apply when a client must renew the lease, prior to its
•
expiration date through a DHCPREQUEST message .
With factory default settings, when no statically defined or DHCP-
•
acquired IP address is available, the default IP address is used . When the
other IP addresses become available, the addresses are automatically
used . The default IP address is always on the management VLAN .
IPv4 Interface
To manage the device by using the web-based configuration utility, the IPv4
device management IP address must be defined and known . The device IP
address can be manually configured or automatically received from a DHCP
server .
To configure the IPv4 device IP address, do the following:
STEP 1 Click Configuration > IP Interface > IPv4 > IPv4 Interface .
STEP 2 Enter values for the following fields:
Chapter 10 IP Interface
39
39
Advertisement
Table of Contents
