Configuring The Dns Server; Configuring The Gateway; Preparing The Interfaces Used For Automatic Configuration; Starting And Completing Automatic Configuration - HP 10500 Series Configuration Manual

Configuring the DNS server

A DNS server is required in the following situations:
The TFTP server does not have a host name file. However, devices need to perform the following
•
operations:
Use their IP addresses to obtain their host names.
Obtain configuration files named in the host name.cfg format from the TFTP server.
• The DHCP server assigns the TFTP server domain name through the DHCP reply message. Devices
must use the domain name to obtain the IP address of the TFTP server.

Configuring the gateway

If the devices to be automatically configured and the servers for automatic configuration reside in
different network segments, you must perform the following tasks:
Deploy a gateway and make sure the devices can communicate with the servers.
•
Configure the DHCP relay agent feature on the gateway.
•
Configure the UDP helper feature on the gateway.
•
When a device sends a request through a broadcast packet to the file server, the UDP helper
changes the broadcast packet to a unicast packet and forwards the unicast packet to the file server.
For more information about UDP helper, see Layer 3—IP Services Configuration Guide.
Preparing the interfaces used for automatic
configuration
The device uses the following steps to select the interface for automatic configuration:
1. Identifies the status of the management Ethernet interface at Layer 2. If the status is up, the device
uses the management Ethernet interface.
2. Identifies the status of Layer 2 Ethernet interfaces. If one or more Layer 2 Ethernet interfaces are in
up state, the device uses the VLAN interface of the default VLAN.
3. Sorts all Layer 3 Ethernet interfaces in up state first in lexicographical order of interface types and
then in ascending order of interface numbers. Uses the interface with the smallest interface number
among the interfaces of the first interface type.
4. If no Layer 3 Ethernet interfaces are in up state, the device waits 30 seconds and goes to step 1 to
try again.
For fast automatic device configuration, connect only the management Ethernet interface on each device
to the network.

Starting and completing automatic configuration

1. Power on the devices to be automatically configured.
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