Cisco DNCS System Release 2.7 3.7 4.2 デザインガイド
4000358 Rev B
Guidelines for Configuring the DBDS for DOCSIS
2-5
IP Address Assignment,
Continued
Subnet 2 (10.64.0.0/10) can be further subdivided into two subnets each with a /11
prefix to support registered and unregistered stand-alone cable modems:
•
•
10.64.0.0/11
•
10.96.0.0/11
The first subnet, 10.64.0.0/11, can be partitioned into 1024 subnets with a /21 prefix.
You can assign addresses from these subnets to registered stand-alone cable
modems.
Because the unregistered stand-alone cable modem is a temporary state, a subnet
Because the unregistered stand-alone cable modem is a temporary state, a subnet
with a /24 prefix per CMTS DOCSIS MAC domain would typically be sufficient to
support stand-alone cable modems during registration. Therefore, the second
subnet, 10.96.0.0/11, can be partitioned into 1024 subnets with the /24 prefix. You
can assign addresses from these subnets to unregistered stand-alone cable modems.
The majority of subnet 10.96.0.0/11 can then be reserved for growth.
The following diagram provides an example of how you can partition Subnet 2
The following diagram provides an example of how you can partition Subnet 2
(10.64.0.10) to support registered and unregistered stand-alone cable modems.
Note: In summary, Subnet 1 (10.0.0.0/10) and part of Subnet 2 (10.64.0.0/10) are
Note: In summary, Subnet 1 (10.0.0.0/10) and part of Subnet 2 (10.64.0.0/10) are
used first. The other two Subnets (3 and 4), in addition to some residual IP addresses
from Subnet 2, are left for growth
.