IBM Storwize V7000 Unified Manual page 80

Table 40. CIDR subnet mask information (continued)
Subnet Mask CIDR Equivalent
255.255.0.0 /16
255.254.0.0 /15
255.252.0.0 /14
255.248.0.0 /13
255.240.0.0 /12
255.224.0.0 /11
255.192.0.0 /10
255.128.0.0 /9
255.0.0.0 /8
254.0.0.0 /7
254.0.0.0 /6
252.0.0.0 /5
248.0.0.0 /4
224.0.0.0 /3
192.0.0.0 /2
128.0.0.0 /1
0.0.0.0 /0
Authentication Method Decision Tree:
The Storwize V7000 Unified systems require one, and only one, authentication
system to allow network users to access file systems or file sets exported (shared)
by the Storwize V7000 Unified system. The authentication system may also be
used to provide User ID mapping. Several authentication methods are supported.
They are:
v
v Lightweight Directory Access Protocol (LDAP)
v Network Information Service (NIS
A local LDAP server can also be used which runs on the file modules, but this is
limited. For example it does not support asynchronous filesystem replication to
another Storwize V7000 Unified system. Refer to Managing authentication and ID
mapping, located in the Information Center.
Use the flow chart below to assist in deciding which authentication method is right
for you. The factors that influence the decision are the types of client hosts, the
existing authentication infrastructure (if any), and if asynchronous file system
replication is to be utilized.
60
IBM Storwize V7000 Unified: Adding Storwize V7000 File Modules to an existing Storwize V7000 system 2073-720
Microsoft Active Directory - with or without SUA / SFU
Note
Class B
2 Class Bs
4 Class Bs
8 Class Bs
16 Class Bs
32 Class Bs
64 Class Bs
128 Class Bs
Class A
2 Class As
4 Class As
2 Class As
8 Class As
16 Class As
32 Class As
64 Class As
IP space