DEC Digital Alpha VME 4/224 User Manual page 317

Environment
Variable Field
EWA0_INETADDR Internet address
of the network
interface (EWA0)
EWA0_SINETADDR Internet address of
the remote server
EWA0_GINETADDR Internet address
of the remote
gateway
EWA0_INETFILE A file to be booted,
formatted as a
string
The Internet addresses use Internet standard dotted decimal notation, for
example,
16.123.16.53
3. Initialize the database. The database is marked as initialized on the first
occurrence of any of the following:
Invoking BOOTP
Invoking TFTP
The most common way for initializing the database is the invocation of
TFTP. When TFTP is invoked and the database has not been marked as
initialized, the initialization occurs automatically, based on the definition of
the environment variable EWA0_INET_INIT. If EWA0_INET_INIT is set to
BOOTP (the default), the BOOTP driver broadcasts a BOOTP request and
stores the response in the database, initializing the database. If EWA0_
INET_INIT is set to NVRAM, the database is initialized by copying the
contents of five nonvolatile default variables into the five database fields.
However, these five nonvolatile default variables must be set in advance.
The five nonvolatile default variables are:
EWA0_DEF_INETADDR
Description
Local address. TFTP and the Address
Resolution Protocol (ARP) do not
operate properly without the correct
address.
The address of a server, which may
or may not be on the local network.
Usually, this is the server from which
to boot. This is the default remote
host contacted by TFTP.
The address of an Internet gateway
on the local network. TFTP cannot
communicate beyond the local
network if this gateway address is
not correct.
Use a fully qualified file name,
according to whatever rules are
specified by the TFTP server on the
remote host. This is the default file
name requested by TFTP.
.
boot
Console Commands 13–9