Juniper-networks J4350 Bedienungsanleitung PDF herunterladen (Seite 147)

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 specifi

c router is required by the network, then the IP address of an

intermedi ary router must be sp ecified . 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, au toinstallation attempts to

download a co

nfiguration file using one of the following methods:

Host-specif

ic configuration. If the DHC P server specifie s the name of the

host-specific configuration file (b oot file), the specific filename is used in the

TFTP server request. The new Se rv ices Router makes three unicast TFTP

requests fo

r the specified boot file. If these attempts fail, then the router

makes three broadcast requests to any available TFTP server looking for the

specified b oot file.

Default configuration. If the boot file cannot be lo cated , or the new Services

Router doe

s not receive a sp e cified bo ot filenam e from the DHCP s er ver, the

autoinstallation process then unicasts or broadcasts TFTP requests for a default

router configuration file called network.conf . The default configuration file,

network.c

onf , contains hostname-to-IP address mapping information.

If th ere is

no entry for the n ew 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 config uration file,

router.c

onf .

After the

configuration file is downloaded from the TFTP server, it is

loaded onto the Services Router and committed.

Before Y

ou Begin

To confi

gure a network for autoinstallation of Services Routers,

complete the follow ing tasks:

Configure a DHCP server on your network to m eet your ne twork requirements.

Before You Begin 127

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