Basic System Configuration Guide Boot Options
Edition: 01 3HE 11010 AAAC TQZZA 141
5.1.2.3 Configuration Discovery
During the configuration discovery stage, the DHCP server receives the DHCP
DISCOVER message and replies with a DHCP OFFER message that contains an IP
address assigned to the network interface. Table 17 describes the options included
in the DHCP OFFER. If any of the required options are not included, the packet may
be dropped and not processed.
DHCP OFFER messages are not dropped if they contain a yiaddr that does not
match the local configured subnets on the DHCP relay interface. This applies only to
regular IES and VPRN interfaces with no lease-populate configured on the DHCP
relay interface.
Option 67 contains further configuration information in the form of keyword text files
interpreted by ADP as instructions and executed during the Configuration and Test
phases. For basic reachability, option 67 is not mandatory; however, it can be used
to send the system IP address of a newly discovered node, making it possible to
communicate with the NSP NFM-P and complete ADP.
If a system IP address is made available with the DHCP OFFER and a template
configuration file is also executed using the load-cfg keyword, then the system IP
address specified in the template configuration file is used instead of the one in the
DHCP OFFER.
Table 17 DHCP OFFER Message Options
Option Name Description Required
yiaddr Client Ip-Address The network interface IP address
For network consistency, it is
recommended that this IP address be a
fixed IP address, not assigned randomly
from a DHCP server IP pool
Yes
1 Subnet Mask The network interface subnet mask Yes
3 Router The network interface default gateway
Only the first router is used – all others are
ignored
No
12 Host Name The network interface host name No
51 Lease Time The least time, validated as infinite Yes
54 Server Address Identifies the DHCP server No
67 Bootfile Name Contains the ADP instructions or a URL to
an ADP instructions file
No
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