Enable DHCP to Provide APs with IP Addresses

Each AP requires a unique IP address on a subnetwork that has connectivity to a managed device. It is recommended you use the DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  to provide IP addresses for APs; the DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  server can be an existing network server or a managed device configured as a DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  server. The APs can avoid IP conflicts due to IP misconfiguration or DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  server malfunctioning. You can now identify and debug IP conflict issue in the local network.

You can use an existing DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  server in the same subnetwork as the AP to provide the AP with its IP information. You can also configure a device in the same subnetwork to act as a relay agent for a DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  server on a different subnetwork. (Refer to the vendor documentation for the DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  Server or relay agent for information.)

The Mobility Master can configure the managed device as a DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  server to assign an IP address to the AP. The managed device must be the only DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  server for this subnetwork.

The following procedure describes how to configure the DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  services:

  1. In the Managed Network node hierarchy, navigate to the Configuration > Services > DHCP tab.
  2. Expand DHCP Server.
  3. Select the check box for either IPv4 DHCP server or IPv6 DHCP server.
  4. In the Pool Configuration table, click +.
  5. Enter information about the subnetwork for which IP addresses are to be assigned. The parameters are described in Table 1.
  6. Click Submit.

Table 1: DHCP Configuration Parameters

Parameter

Description

IP Version

Select the IP version used by the DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  pool configuration

Pool name

Enter the name of the DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  pool.

Default routers

Enter an IP address to assign the DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  default router for the managed device

DNS Servers

Enter an IP address to assign the DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  DNS Domain Name System. A DNS server functions as a phone book for the intranet and Internet users. It converts human-readable computer host names into IP addresses and IP addresses into host names. It stores several records for a domain name such as an address 'A' record, name server (NS), and mail exchanger (MX) records. The Address 'A' record is the most important record that is stored in a DNS server, because it provides the required IP address for a network peripheral or element. server for the managed device

Import from DHCP/PPPoE

Enables/disables importing of DNS Domain Name System. A DNS server functions as a phone book for the intranet and Internet users. It converts human-readable computer host names into IP addresses and IP addresses into host names. It stores several records for a domain name such as an address 'A' record, name server (NS), and mail exchanger (MX) records. The Address 'A' record is the most important record that is stored in a DNS server, because it provides the required IP address for a network peripheral or element. server configurations.

Domain name

Domain name used by the client.

WINS

Enter IP address to assign Windows Internet Name Service servers. When entering multiple servers, each server must be separated by a space.

Import from DHCP/PPPoE

Enables/disables importing WINS server configurations.

Lease days

Length of time a device may lease the DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  in days. Entering 0 indicates no time limit.

Lease hours

Length of time a device may lease the DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  in hours.

Lease minutes

Length of time a device may lease the DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  in minutes.

Lease seconds

Length of time a device may lease the DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  in seconds.

Network IP address

Subnetwork for the pool

Network IP mask

Enter an IP address to assign the netmask Netmask is a 32-bit mask used for segregating IP address into subnets. Netmask defines the class and range of IP addresses. for the DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  pool

Option

DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  option number

Excluding IP Addresses

If there are addresses that should not be assigned in the subnetwork:

  1. Click + in the Excluded Address Range table that corresponds with the IP version used.
  2. Enter the address range in the Add Excluded Address section.
  3. Click Submit.

The following CLI Command-Line Interface. A console interface with a command line shell that allows users to execute text input as commands and convert these commands to appropriate functions. commands configure the DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  services:

(host)[node](config)# ap system-profile <profile>

rap-dhcp-default-router <ip-addr>

rap-dhcp-dns-server <ip-addr>

rap-dhcp-lease

rap-dhcp-pool-end

rap-dhcp-pool-start

rap-dhcp-pool-netmask

rap-dhcp-server-id

rap-dhcp-server-vlan

(host)[node](config)# ip dhcp

adaptive

default-pool

excluded-address

load-balance

ping-check

pool

(host)[node](config)# service

dhcp

dhcpv6

IP Conflict Detection

An IP conflict occurs when the same IP address is assigned to another host on the network. This causes an AP to lose connectivity to the local network. Starting from ArubaOS 8.4.0.0, an AP can detect and resolve an IP conflict in the network using a Gratuitous ARP Address Resolution Protocol. ARP is used for mapping IP network address to the hardware MAC address of a device. probe.

Duplicate Address Detection

Starting from ArubaOS 8.7.0.0, Duplicate Address Detection (DAD) feature is supported for APs in IPv6 deployments.

DAD is an IP conflict detection mechanism that identifies IP conflicts when the AP obtains IPv6 address from static, RA Router Advertisement. The RA messages are sent by the routers in the network when the hosts send multicast router solicitation to the multicast address of all routers., or DHCPv6 server. However, DAD prevents IP conflicts only when the AP obtains IPv6 address from DHCPv6 server. IPv6 conflict usually occurs when two hosts on the same network use the same IPv6 address, which creates unstable connection on both the hosts.

When a new device joins and requests for an IPv6 address, the DHCPv6 server allocates a free IPv6 address from the IP pool. In this process, if the DHCPv6 server malfunctions and assigns multiple devices with a single IPv6 address, or if the AP obtains an IPv6 address from DHCPv6 server that is already allocated to a device in the same network, an IP conflict occurs. For example, if the AP receives 2001:1234::abcd as the IPv6 address from DHCPv6 server during boot process, and another host on the VLAN Virtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN. also uses 2001:1234::abcd IPv6 address, then DAD identifies the duplicate IPv6 address conflict and renews a free IPv6 address from the DHCPv6 server. DAD verifies if a configured unicast IPv6 address is unique and has not been used anywhere else before the unicast IPv6 address is assigned to a VLAN Virtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN. interface on the AP. If the unicast IPv6 address is a duplicate, the address is not used in the deployment.

DAD is enabled and configured on the default IPv6 configuration during AP boot process.