Cisco Cisco Prime IP Express 8.3 Technical References
use-dns-update-prereqs. By default (enabled), the DHCP server
adds prerequisites to DNS update messages to assure that the
current client uses the domain name, before updating the client
with the current lease (IP Address).
If disabled, the DHCP server assumes that the current client is
entitled to the domain name (and hence not add prerequisites to
DNS update message) and associates the client's current lease
with that domain name.
Note: The DHCP server always adds prerequisites to the DNS
update message while adding a new domain name record on behalf of
a client acquiring a new lease and removing the domain name record
when client release its lease or the lease expires.
adds prerequisites to DNS update messages to assure that the
current client uses the domain name, before updating the client
with the current lease (IP Address).
If disabled, the DHCP server assumes that the current client is
entitled to the domain name (and hence not add prerequisites to
DNS update message) and associates the client's current lease
with that domain name.
Note: The DHCP server always adds prerequisites to the DNS
update message while adding a new domain name record on behalf of
a client acquiring a new lease and removing the domain name record
when client release its lease or the lease expires.
default = false
Indicates whether gss-tsig should be used for updates.
(address=1, client-id=2, hashed-client-id=3) default = address
Controls what the DHCP server appends to the synthetic name stem when
synthesizing the fully-qualified domain name for a client. This
option is used when client does not supply any hostname in its
request.
address:
Identifies the v4 address of client.
client-id:
Client-id or DUID given by DHCPv4 client in its request
(Option 61).
hashed-client-id:
The hashed client id. The rightmost 64-bits of the SHA-256 hash
over the client id appended with the forward zone name
(in DNS wire format) is used to generate a 13-character base 32
encoded string.
synthesizing the fully-qualified domain name for a client. This
option is used when client does not supply any hostname in its
request.
address:
Identifies the v4 address of client.
client-id:
Client-id or DUID given by DHCPv4 client in its request
(Option 61).
hashed-client-id:
The hashed client id. The rightmost 64-bits of the SHA-256 hash
over the client id appended with the forward zone name
(in DNS wire format) is used to generate a 13-character base 32
encoded string.
Defines an expression that evaluates to the synthesized host name
to be used. If undefined or the expression returns "", the
configured host name synthesis is used. If the expression returns
a null value, no host name will be used.
to be used. If undefined or the expression returns "", the
configured host name synthesis is used. If the expression returns
a null value, no host name will be used.
(duid=1, hashed-duid=2, cablelabs-device-id=3, cablelabs-cm-mac-addr=4) default
= hashed-duid
Controls what the DHCP server appends to the synthetic name stem
when synthesizing the fully-qualified domain name for a client:
duid
The raw client DUID. This is formatted as a hexadecimal
string with a hyphen as separator between each octet.
hashed-duid
The hashed client DUID. The rightmost 64-bits of the SHA-256
hash over the client's DUID appended with the forward zone
name (in DNS wire format) is used to generate a 13-character
base 32 encoded string. This is the default method and the
fallback method if the configured type is not possible
(that is, the option needed to generate the selected type
does not exist for the client).
cablelabs-device-id
The Cablelabs CL_OPTION_DEVICE_ID option data is used, if
available. This is formatted as a hexadecimal string with a
hyphen as separator between each octet. This might be used
for names generated for DOCSIS 3.0 cable modems.
cablelabs-cm-mac-addr
The Cablelabs CL_CM_MAC_ADDR option data is used, if
available. This is formatted as a hexadecimal string with
a hyphen as separator between each octet. This might be
used for names generated for CPEs behind a customer's
DOCSIS 3.0 cable modem (if the customer has multiple CPEs,
a name collision and disambiguation will likely result).
Note: Several of these methods may cause privacy concerns if
the DNS is accessible from the Internet.
when synthesizing the fully-qualified domain name for a client:
duid
The raw client DUID. This is formatted as a hexadecimal
string with a hyphen as separator between each octet.
hashed-duid
The hashed client DUID. The rightmost 64-bits of the SHA-256
hash over the client's DUID appended with the forward zone
name (in DNS wire format) is used to generate a 13-character
base 32 encoded string. This is the default method and the
fallback method if the configured type is not possible
(that is, the option needed to generate the selected type
does not exist for the client).
cablelabs-device-id
The Cablelabs CL_OPTION_DEVICE_ID option data is used, if
available. This is formatted as a hexadecimal string with a
hyphen as separator between each octet. This might be used
for names generated for DOCSIS 3.0 cable modems.
cablelabs-cm-mac-addr
The Cablelabs CL_CM_MAC_ADDR option data is used, if
available. This is formatted as a hexadecimal string with
a hyphen as separator between each octet. This might be
used for names generated for CPEs behind a customer's
DOCSIS 3.0 cable modem (if the customer has multiple CPEs,
a name collision and disambiguation will likely result).
Note: Several of these methods may cause privacy concerns if
the DNS is accessible from the Internet.
Identifies the view associated with the forward and
reverse zones used for DNS update.
reverse zones used for DNS update.
dhcp-interface