<s>
Cisco	O
Prime	O
Network	O
Registrar	O
(	O
CNR	O
)	O
is	O
a	O
Cisco	O
software	O
product	O
that	O
includes	O
components	O
for	O
Domain	B-Protocol
Name	I-Protocol
System	I-Protocol
(	O
DNS	B-Protocol
)	O
services	O
,	O
Dynamic	B-Protocol
Host	I-Protocol
Configuration	I-Protocol
Protocol	I-Protocol
services	O
,	O
Trivial	B-Device
File	I-Device
Transfer	I-Device
Protocol	I-Device
(	O
TFTP	B-Device
)	O
services	O
,	O
and	O
Simple	B-Protocol
Network	I-Protocol
Management	I-Protocol
Protocol	I-Protocol
functions	O
.	O
</s>
<s>
CNR	O
is	O
a	O
DHCP/DHCPv6	O
server	O
used	O
by	O
cable-based	O
and	O
similar	O
network	O
service	O
providers	O
because	O
of	O
its	O
support	O
for	O
fail-over	O
between	O
redundant	O
servers	O
,	O
Dynamic	B-Protocol
DNS	I-Protocol
updates	I-Protocol
so	O
that	O
DHCP	B-Protocol
leases	O
are	O
reflected	O
in	O
DNS	B-Protocol
data	O
,	O
integration	O
with	O
directory	O
services	O
using	O
LDAP	B-Protocol
Version	O
3	O
,	O
and	O
ability	O
to	O
handle	O
high	O
request	O
rates	O
.	O
</s>
<s>
The	O
DNS	B-Protocol
Server	I-Protocol
in	O
CNR	O
7.1	O
provides	O
both	O
authoritative	O
and	O
recursive	O
service	O
,	O
supports	O
incremental	O
zone	O
transfer	O
,	O
notify	O
,	O
and	O
dynamic	O
update	O
,	O
and	O
can	O
service	O
IPv6	O
requests	O
but	O
does	O
not	O
originate	O
IPv6	O
requests	O
.	O
</s>
<s>
It	O
supports	O
TSIG	B-Protocol
authentication	O
of	O
zone	O
transfers	O
and	O
update	O
but	O
does	O
not	O
support	O
the	O
data	O
origination	O
authentication	O
features	O
of	O
DNSSEC	B-Protocol
.	O
</s>
<s>
There	O
are	O
also	O
facilities	O
for	O
pushing	O
data	O
(	O
DNS	B-Protocol
zones	O
,	O
etc	O
.	O
)	O
</s>
