System information

180
AS/400 IBM Network Station: Techniques for Deployment in a WAN
Figure 88. AS/400 Operations Navigator - TCP/IP Server Status
The BOOTP/DHCP Relay Agent now forwards DHCP messages from the
workstation controller interface to the DHCP server, As2.
5.8.7 Changing the DHCP Server Configuration
The twinax subnet addresses that you use must
be a subset of the address
space 10.1.1.x. Because of this, the pool of addresses from 10.1.1.1 through
10.1.1.254 must be divided into two ranges. The pool must also be further
reduced so that it does
not
include the addresses from 10.1.1.192 through
10.1.1.254, as these are used for the twinax subnet.
In this scenario, the address range from 10.1.1.1 through 10.1.1.254 is
divided into two groups by applying masks to the range within the DHCP
configuration. The two groups are then put back together, within the DHCP
configuration, to form one group. DHCP option 1 is also used to specify the
correct subnet mask to pass back to the client.
To divide the group into two ranges and allow the range to end at 10.1.1.192,
a mask of 255.255.255.128 is applied in the DHCP configuration. This allows
two groups of 128 addresses. The first group starts at 10.1.1.1 and ends at
10.1.1.127. The second group then has a mask of 255.255.255.192 applied
to it. This creates a range of addresses from 10.1.1.128 through 10.1.1.191.
Refer to Figure 89 on page 181 for a visual representation of the address
space from 10.1.1.1 through 10.1.1.191.