05-04-2008
DHCPDECLINE error
I have a dhcp server and I am am using fixed-address to specify fixed address for my machines like so:
subnet 1.2.3.0 netmask 255.255.255.0 {
option routers 1.2.3.1;
host myhost {
hardware ethernet 00:00:00:00:00:11;
fixed-address 1.2.3.4;
}
}
In the dhcpd.log I get a whole bunch of DHCPDECLINE errors for all the fixed-address hosts like so:
dhcpd: DHCPOFFER on 1.2.3.4 to 00:00:00:00:00:11 via 1.2.3.1
dhcpd: DHCPREQUEST for 1.2.3.4 (xx.xx.xx.xx) from 00:00:00:00:00:11 via 1.2.3.1
dhcpd: DHCPACK on 1.2.3.4 to 00:00:00:00:00:11 via 1.2.3.1
dhcpd: DHCPDECLINE of 1.2.3.4 from 00:00:00:00:00:11 via 1.2.3.1: not found
There is no other device with the address of 1.2.3.4, why is the client refusing the IP address? More over, when I boot the client or restart its network, it does get the IP address offered by the dhcp, i.e. 1.2.3.4. Why does it produce those errors if it does in fact use the address? And those errors are produced every minute for every server with the fixed-address.
I have changed the address to protect the innocent.
Any help would be appreciated.
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LEARN ABOUT SUSE
netmasks
netmasks(4) File Formats netmasks(4)
NAME
netmasks - network mask database
SYNOPSIS
/etc/inet/netmasks
/etc/netmasks
DESCRIPTION
The netmasks file contains network masks used to implement IP subnetting. It supports both standard subnetting as specified in RFC-950 and
variable length subnetting as specified in RFC-1519. When using standard subnetting there should be a single line for each network that is
subnetted in this file with the network number, any number of SPACE or TAB characters, and the network mask to use on that network. Network
numbers and masks may be specified in the conventional IP `.' (dot) notation (like IP host addresses, but with zeroes for the host part).
For example,
128.32.0.0 255.255.255.0
can be used to specify that the Class B network 128.32.0.0 should have eight bits of subnet field and eight bits of host field, in addition
to the standard sixteen bits in the network field.
When using variable length subnetting, the format is identical. However, there should be a line for each subnet with the first field being
the subnet and the second field being the netmask that applies to that subnet. The users of the database, such as ifconfig(1M), perform a
lookup to find the longest possible matching mask. It is possible to combine the RFC-950 and RFC-1519 form of subnet masks in the net-
masks file. For example,
128.32.0.0 255.255.255.0
128.32.27.0 255.255.255.240
128.32.27.16 255.255.255.240
128.32.27.32 255.255.255.240
128.32.27.48 255.255.255.240
128.32.27.64 255.255.255.240
128.32.27.80 255.255.255.240
128.32.27.96 255.255.255.240
128.32.27.112 255.255.255.240
128.32.27.128 255.255.255.240
128.32.27.144 255.255.255.240
128.32.27.160 255.255.255.240
128.32.27.176 255.255.255.240
128.32.27.192 255.255.255.240
128.32.27.208 255.255.255.240
128.32.27.224 255.255.255.240
128.32.27.240 255.255.255.240
128.32.64.0 255.255.255.192
can be used to specify different netmasks in different parts of the 128.32.0.0 Class B network number. Addresses 128.32.27.0 through
128.32.27.255 have a subnet mask with 28 bits in the combined network and subnet fields (often referred to as the subnet field) and 4 bits
in the host field. Furthermore, addresses 128.32.64.0 through 128.32.64.63 have a 26 bits in the subnet field. Finally, all other
addresses in the range 128.32.0.0 through 128.32.255.255 have a 24 bit subnet field.
Invalid entries are ignored.
SEE ALSO
ifconfig(1M), inet(7P)
Postel, Jon, and Mogul, Jeff, Internet Standard Subnetting Procedure, RFC 950, Network Information Center, SRI International, Menlo Park,
Calif., August 1985.
V. Fuller, T. Li, J. Yu, K. Varadhan, Classless Inter-Domain Routing (CIDR): an Address Assignment and Aggregation Strategy, RFC 1519,
Network Information Center, SRI International, Menlo Park, Calif., September 1993.
T. Pummill, B. Manning, Variable Length Subnet Table For IPv4, RFC 1878, Network Information Center, SRI International, Menlo Park, Calif.,
December 1995.
NOTES
/etc/inet/netmasks is the official SVr4 name of the netmasks file. The symbolic link /etc/netmasks exists for BSD compatibility.
SunOS 5.10 7 Jan 1997 netmasks(4)