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Hello, I have just swapped our network over to v3 of the ISC DHCP server and
a couple of issues have come up which we did not pick up in testing.

First, the man page states

The DHCP server will normally assume that the configuration information
about
a given network segment is known to be correct and is authoritative. So if a
client requests an IP address on a given network segment that the server
knows
is not valid for that segment, the server  will respond with a DHCPNAK
message,
causing the client to forget its IP address and try to get a new one.

In practice however, when a client workstation comes up on a new subnet, its
requests for its previous address were being ignored rather than nacked.
Adding
the authoritative statement was needed rather than being the default as
stated.
Probably everybody except me already knew this but I thought I'd mention it.


Second, when a bootp client is served (novells lan workplace) it sends the
users
login name rather than a workstation name. Can I configure the DHCP to
exclude
the dynamic BOOTP ranges from updating the DNS? My current subnet
declarations
look like

subnet 155.128.88.0 netmask 255.255.255.0 {
  range 155.128.88.50 155.128.88.199;
  range dynamic-bootp 155.128.88.200 155.128.88.254;
  option routers 155.128.88.1;
  option broadcast-address 155.128.88.255;
}

the global section has

server-identifier 165.118.92.5;
authoritative;

# option definitions common to all supported networks...

option domain-name "blah.blah";
option domain-name-servers 155.128.92.5;
option netbios-name-servers 155.128.81.17,165.118.19.23;
option subnet-mask 255.255.255.0;
ddns-domainname "blah.blah";
ddns-rev-domainname "in-addr.arpa";
default-lease-time 1209600;
max-lease-time 1209600;


thanks


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