Juniper J4350, Руководство по началу работы

Страница: 147 / 284

Configuring Autoinstallation
specified, a DNS server must be available to translate the name of the TFTP
server into an IP address.
If the TFTP server is not on the same LAN segment as the new Services Router,
or if a specific router is required by the network, then the IP address of an
intermediary router must be specified. This address is used as the location to
receive TFTP requests for autoinstallation.
Automatic Configuration of a New Services Router
After a new Services Router obtains an IP address, autoinstallation attempts to
download a configuration file using one of the following methods:
Host-specific configuration. If the DHCP server specifies the name of the
host-specific configuration file (boot file), the specific filename is used in the
TFTP server request. The new Services Router makes three unicast TFTP
requests for the specified boot file. If these attempts fail, then the router
makes three broadcast requests to any available TFTP server looking for the
specified boot file.
Default configuration. If the boot file cannot be located, or the new Services
Router does not receive a specified boot filename from the DHCP server, the
autoinstallation process then unicasts or broadcasts TFTP requests for a default
router configuration file called
network.conf . The default configuration file,
network.conf , contains hostname-to-IP address mapping information.
If there is no entry for the new Services Router, the autoinstallation process
sends out a DNS request and attempts to resolve the hostname. If the J-series
Services Router can determine its hostname, a TFTP request is sent for the
hostname.conf file. The variable, hostname , is replaced by the hostname of
the router. If the new Services Router is unable to map its IP address to
a hostname, then TFTP requests are sent for the default configuration file,
router.conf .
After the configuration file is downloaded from the TFTP server, it is
loaded onto the Services Router and committed.
Before You Begin
To configure a network for autoinstallation of Services Routers,
complete the following tasks:
Configure a DHCP server on your network to meet your network requirements.
Before You Begin
127