HP 200 Series Services And Applications page 273
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Also See for 200 Series:
- Installation manual (144 pages) ,
- Hardware support document (95 pages) ,
- Instructions manual (7 pages)
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addresses will not be used. Thus, the subnet mask 255.255.255.252 is the
minimum subnet mask that will provide only two addresses per subnet. Now
that a suitable subnet mask for use on point-to-point links has been deter-
mined, subnet numbers and addresses must be selected.
Table B. Point-to-Point Subnet and Address Definition
16 Bits
8 Bits
Upper 6 Bits
Network
Subnet
Subnet Extension
Number
Number
Component
170.200
5
000000
170.200
5
000001
170.200
5
000010
170.200
5
000011
The following method of selecting subnet numbers and point-to-point link
addresses illustrates one method of allocating addresses that seemingly
maintains the address structure used in allocating LAN subnets. The first
point-to-point subnet defined in figure 4 was subnet 170.200.5.x, the second
was 170.200.6.x, and so on. To maintain consistency with that addressing
scheme, the point-to-point subnets to be defined will use 170.200.5.x as the
base for selecting link addresses. The last octet (the "x" octet) will be used
to define individual point-to-point subnets and addresses. Table B shows the
allocation of subnets and point-to-point addresses. Extending the subnet
mask to include the upper 6 bits of the last octet for point-to-point links
provides enough address space for 64 point-to-point links.
Routing with OSPF
Conserving IP Address Space
Lower 2 bits
32 Bits/32 Bits
Link Address
Full Point-to-Point Link
Component
Addresses
01/10
170.200.5.1/170.200.5.2
01/10
170.200.5.5/170.200.5.6
01/10
170.200.5.9/170.200.5.10
01/10
170.200.5.13/170.200.5.14
3-79
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