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Chapter 5. System management 83
The DHCP service starts after the SDMC installation is completed. You can also
manually start or stop the DHCP service by using the following commands:
chnetcfg -c dhcp -s enable Starts the DHCP service.
chnetcfg -c dhcp - disable Stops the DHCP service.
If you removed a system from the SDMC previously, SDMC places the IP
address of the removed system in a file. Any IP address in this file is not
automatically discovered by SDMC. When you run the smcli mksysconn -o auto
command, it removes all the IP addresses from that file. If you want to rediscover
a specific system that you had previously removed, you can do that by executing
the following command:
smcli rmsysconn -o rediscover {-m managed-system | -e managed-frame}
The change in IP addresses are automatically handled in a DHCP and auto
discovery setup, but this does not apply to systems that were manually
discovered. In that case, you have to remove the system from SDMC and
rediscover it to reflect the change in the IP address.
5.1.5 IP address rules
System discovery in SDMC supports both the IPv4 and IPv6 protocols. The IP
addresses specified in the System Discovery page must adhere to the following
rules:
򐂰 The maximum permitted range of IP addresses is 256.
򐂰 For IP address ranges, the starting IP address must be less than the ending
IP address, where only the last piece of the starting and ending IP addresses
are unique.
򐂰 All IP addresses in a valid IPv4 address range must occur in the same class
C subnet.
򐂰 The IPv6 address compression can be used to replace one or more
consecutive instances of “0” in an IP address.
򐂰 The IPv6 loopback address (0:0:0:0:0:0:0:1 or ::1) is not supported.
򐂰 The prefix length and scope ID for IPv6 addresses are not supported.
򐂰 Use the smallest range possible when discovering with a range of IP
addresses.