Dual Hardware Management Consoles; Internet Protocol Conventions For Ipv4 And Ipv6 - IBM DS8000 User Manual

Dual Hardware Management Consoles

Internet Protocol Conventions for IPv4 and IPv6

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4. Click Browser. The Web Browser is started with no address bar and a Web
page titled WELCOME TO THE DS8000MANAGEMENT CONSOLE is
displayed.
5. Click the link "IBM System Storage DS Storage Manager" to access the DS
Storage Manager.
An external management console is available as an optional feature and can be
used as a redundant management console for environments with high-availability
requirements.
The loss of a single hardware management console configuration will not prevent
the DS8000 from working. The DS8000 will not be able to call home, change its
configuration, and start or stop remote Copy Services through the GUI, CLI, or
API. When either an external or internal management console is pared with a
single internal management console controlling a single DS8000, this is referred to
as a 2X1 configuration. This dual configuration is appropriate for customers with
high-availability requirements (particularly with remote Copy Services
requirements).
The DS8000 supports the use of Internet Protocol Version 4 (IPv4) and Internet
Protocol Version 6 (IPv6). Customer network ports can be configured using the
hardware management console (HMC) to use either or both standards. IPv6
provides a higher level of security than IPv4.
An IPv4 address is 32 bits. An IP Address is shown as 4 decimal numbers
representing 4 bytes: d.d.d.d where d = decimal number (0 - 255). High order bits
are the network identifier and lower order bits are the host identifier. The number
of bits in a network identifier is defined by a subnet mask which looks like an IP
address with all 1s in high order bits and all 0s in low order bits (for example,
255.255.255.0). An IP address with the host identifier set to all 1s is a broadcast
address for all hosts on the network. An IP address can also include a port
number. The port number follows the IP address and is separated by a colon (for
example, 250.250.250.1:8451).
An IPv6 address is 128 bits. The preferred IP address format has 8 hexadecimal
numbers representing 16 bytes (for example, x:x:x:x:x:x:x:x (x = X'0' - X'FFFF')). An
IPv6 address can contain an imbedded IPv4 address. The format has 6 hexadecimal
and 4 decimal numbers representing 16 bytes (for example, x:x:x:x:x:x:d.d.d.d (x =
'0'x - X'FFFF' and d = 0 - 255)). A compressed form allows one string of 0s to be
replaced by '::' (for example, FF01:0:0:0:0:0:0:1A2 can be represented by FF01::1A2).
High order bits are for the subnet prefix. Lower order bits are for the interface
identifier.
An IPv6 adddress can have a number of bits in a subnet prefix that are defined by
a decimal prefix following the IP address (for example, FF01::101/96 has a 96–bit
subnet prefix and a 32–bit interface identifier). Most IPv6 address are required to
have a 64–bit prefix length. Specific high order bit combinations in the subnet
prefix are defined for specific purposes. An IPv6 IP address can also specify an IP
port number (for example, [x:x:x:x:x:x:x:x]:p, where p = decimal number).
Multiple IPV6 addresses can be assigned to an interface:
Chapter 5. IBM System Storage Management Console
89