Bay Networks 8000 RAC Installing Manual page 78

Chapter 3 ROM Monitor Commands
Installing the Model 8000 Remote Access Concentrator
3-6
The RAC must have an Internet (IP) address in its memory before it can
load its operational image across the Ethernet via the IP protocol.
Therefore, you must enter the IP address before booting the RAC from a
UNIX load host. If you do not define a subnet mask, the RAC uses the
generic mask for the specified IP address.
The subnet mask must be set correctly for the network you are
using or erratic operation will result (boot failure or ICMP
"redirect" storms are likely results).
The RAC tries to boot from a preferred UNIX load host. If you do not
define a preferred load host, the RAC broadcasts its load request and loads
software from the first host that responds.
If the part of the IP address containing the network or subnet address
differs from that of the preferred load or dump host, the host must be
reached through a gateway (router). The addr command prompts you for
this gateway's IP address.
The RAC uses the broadcast address parameter when loading a file. If
this parameter contains a specific address (for example, 132.245.6.255),
the RAC uses only that address for broadcasting. If the value is all zeros
(0.0.0.0), the ROM Monitor tries various combinations of broadcast
addresses and subnet or network broadcasts. The RAC broadcasts its
request three times for each possible combination of broadcast addresses.
You can specify the IP encapsulation type as either ethernet for DIX
Ethernet-II, or ieee802 for IEEE 802.2/802.3. The default IP
encapsulation is ethernet. All systems that have Ethernet interfaces are
IEEE 802.3 compliant, but very few actually use 802.3 packet
encapsulation.
Do not change this parameter unless you know for certain that
your Ethernet hosts are using IEEE 802.2/802.3 packet
encapsulation. An incorrect encapsulation type prevents your
RAC from booting.