HP 600 Series, Services And Applications

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Station Address Resolution
On each DECnet node, network-layer addresses are resolved to station
(MAC) addresses when the node initializes. The station address on these
nodes will be modified based on the area number and node number that you
have configured on the nodes. This also happens for the network interfaces
(circuit groups) on the router. The station address will always have the
number AA0004h, the DEC vendor code, as its most-significant 24 bits. The
uniqueness of the network-layer addresses preserves the uniqueness of the
station address.
The station address resolution for DECnet node 1.10 is shown in figure 2.
The station address for node 1.10 will be AA0004000A04h.
Decimal Hexadecimal Binary
DEC Vendor Code (24 bits): — AA0004 —
Area Number (6 bits): 1 — 000001
Node Number (10 bits): 10 — 0000001010
Station Address (48 bits, 6 octets)
Conversion
Pattern
Binary
Representation
Hexadecimal
Representation
7 0 7 0
Octet 5
DEC Vendor Code
(3 octets)
1 0 1 0 1 0 1 0 A A h
0 0 0 0 0 0 0 0 0 0 h
0 0 0 0 0 1 0 0 0 4 h
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 h
Node Number 0 0 0 0 1 0 1 0 0 A h
Octet 0 Area Number 0 0 0 0 0 1 0 0 0 4 h
7 2 0 7 2 0
2 most significant
bits of 10-bit Node
Number
Station Address: AA0004000A04h
Figure 2. Station Address Resolution for Node 1.10
DECnet Routing Service
Station Address Resolution
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