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Table of Contents
Linksys
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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:
192 168 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 IP address, it issues DHCPv4
requests until a response is received from the DHCP 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 192 168 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:
•
Management VLAN—Select the Management VLAN used to access
the device through telnet or the Web GUI VLAN1 is the default
Management VLAN
•
IP Address Type—Select one of the following options:
Содержание Smart Switch LGS3XX
Страница 1: ...Smart Switch LGS3XX User Guide ...
