AIS Router AI2524 - Manual (Page 70)

AI2524 Router Card User’s Manual
Page 5-4 August 1997
2524UM
Use a DOS-Based
TFTP Server AutoInstall over Frame Relay and other WAN encapsulations support
downloading configuration files from UNIX-based and DOS-based
TFTP servers. Other booting mechanisms such as RARP and SLARP
also support UNIX-based and DOS-based TFTP servers.
The DOS format of the UNIX network-confg file that must reside on
the server must be eight characters or fewer, with a three-letter exten
sion. Therefore, when an attempt to load network-confg fails, AutoIn-
stall automatically attempts to download the file cisconet.cfg from the
TFTP server.
If cisconet.cfg exists and is downloaded successfully, the server is as-
sumed to be a DOS machine. The AutoInstall program then attempts
to resolve the host name for the router through host commands in
cisconet.cfg.
If cisconet.cfg does not exist or cannot be downloaded, or if the pro-
gram is unable to resolve a host name, DNS attempts to resolve the
host name. If DNS cannot resolve the host name, the router attempts
to download ciscortr.cfg. If the host name is longer than eight charac-
ters, it is truncated to eight characters. For example, a router with a
host name australia will be treated as australi and AutoInstall will at-
tempt to download australi.cfg.
The format of cisconet.cfg and ciscortr.cfg is the same as those de-
scribed for network-confg and hostname-confg.
If neither network-confg nor cisconet.cfg exists and DNS is unable to
resolve the host name, AutoInstall attempts to load router-confg, and
then ciscortr.cfg if router-confg does not exist or cannot be down-
loaded. The cycle is repeated three times.