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microcs default:\
:sm=255.255.255.0:gw=132.245.22.66:\
:hn:vm=auto:to=-18000:
terminator:\
:ht=1:ha=00802d004879:ip=132.245.22.6
:tc=microcsdefault:
In the previous example:
•
sm is the subnet mask;
•
gw is the load/ dump gateway address; ht is host type (1=Ethernet);
•
ip is the Micro-CS's Internet Address; ha is the Micro-CS's hardware
address (Ethernet Address); and
•
vm is the Vendor Magic Cookie.
When the Micro-CS receives a BOOTP response with the sm, gw, and ip
set, it sets the respective parameters: subnet_mask,
load_dump_gateway, and inet_addr. The Vendor Magic Cookie must
be set to auto. This indicates that bootpd should respond to the client
(Micro-CS in this case) with whatever format the client requests; the
Micro-CS (client) always requests in the decimal dot notation format
(99.130.83.99). The bootpd adds the address of the host on which it is
running as the Server Address in the bootp response message. The ROMs
use the Server Address as the preferred load host and store it in the
pref_load_addr parameter.
The bootpd must be running on the Micro-CS's preferred load
NOTE
host.
2.5.2
Retrieving Boot Information Using RARP
If the Micro-CS does not receive a successful BOOTP response it uses
RARP to get the boot information. For a successful RARP retrieval,
TCP/IP must be running on a host that is on the same network as the
Micro-CS and the host's ARP table must be initialized with the
Micro-CS's Internet and Ethernet addresses (see the arp man page,
arp -s).
Micro-CS Installation Guide
Auto-Initializing the ROMs
2-7
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