Hitachi Storage Navigator Modular 2 User Guide

							Recording Navigator 2 SettingsC–3
Hitachi Storage Navigator Modular 2 User’s Guide 
						

							C–4Recording Navigator 2 Settings
Hitachi Storage Navigator Modular 2 User’s Guide 
						

							Understanding IP addressesD–1
Hitachi Storage Navigator Modular 2 User’s Guide
D
Understanding IP addresses
Every machine on the Internet has a unique identifying number, 
called an IP address. Computers interpret IP addresses as binary 
values of 0 and 1. To make this value easier for humans to 
understand, this binary value is expressed in decimal format as a 
“dotted decimal number”. For example, 192.168.0.17 is an 
example of an IP address.
This chapter provides a brief background about IP addresses. It 
covers the following key topics:
ˆWorking with IP address settings
ˆViewing your PC’s IP address settings
ˆChanging your PC’s IP address settings
ˆInternet Protocol version 6 
						

							D–2Understanding IP addresses
Hitachi Storage Navigator Modular 2 User’s Guide
Working with IP address settings
An IP address is the unique address for each device connected to the 
Internet, such as your computer or Simple Modular Storage array. An IP 
address consists of four numeric segments called “octets” that are 
separated by periods (for example, 192.168.0.100).
As you learned from installing Storage Navigator Modular 2 (Navigator 2), 
IP addresses can be static, in which case a permanent number is assigned 
to your computer (by your network or administrator), or they can be 
dynamic, meaning a temporary number is assigned each time you connect 
to the network.
Viewing your PC’s IP address settings
The Navigator 2 installation required you to ascertain the IP address of your 
PC. The manual or online help for your operating system should describe 
how to view your PC’s IP address. With Windows XP or 2000, for example, 
you can perform the following steps to see what IP address, default 
gateway, and subnet mask your PC is using:
1. Click the Start button and select All Programs (Windows XP) or 
Programs (Windows 2000). 
2. Select Accessories, then Command Prompt.
3. At the command prompt, type ipconfig and press the Enter key. Your 
PC’s IP address, subnet mask, and default gateway are displayed (see 
Figure D-1).
4. To close the command prompt, type exit and press Enter.
Figure D-1:  Example of Using ipconfig
If your PC has Internet access, you can also visit www.ShowIPAddress.com. 
The site will display your IP address and other information about your 
system. 
						

							Understanding IP addressesD–3
Hitachi Storage Navigator Modular 2 User’s Guide
Changing your PC’s IP address settings
To change your PC’s IP address in WIndows XP and Windows 2000
1. Click on the Start button and select Control Panel.
2. Click on Network and Internet connections.
3. In the Control Panel widow, double-click on Network Connections. 
Icons for each Local Area connection are displayed.
4. Either double-click a Local Area Connection or right click a Local Area 
Connection and select Properties. The Local Area Connection 
Properties dialog box widow appears (see Figure D-2).
Figure D-2:  Local Area Connection Properties Dialog Box
5. Under This connection uses the following items, scroll down until 
you see Internet Protocol (TCP/IP). Then select this connection type 
and click Properties. The Internet Protocol (TCP/IP) Properties dialog 
box appears (see Figure D-3 on page D-4). 
						

							D–4Understanding IP addresses
Hitachi Storage Navigator Modular 2 User’s Guide
Figure D-3:  Sample Internet Protocol (TCP/IP) Properties Dialog Box
6. Click Use the following IP address. The IP address, Subnet mask, 
and Default gateway fields become available.
7. Enter the required IP address, subnet, and gateway in the appropriate 
fields.
8. Click the OK button to return to the Local Area Connection Properties 
dialog box.
9. Click the OK button to exit the Local Area Connection Properties dialog 
box.
Internet Protocol version 6
Most of today’s Internet uses Internet Protocol version 4 (IPv4). However, 
with the popularity of IP-enabled devices that access Internet and packet-
switched internetworks, there is an increasing shortage of IPv4 addresses. 
As the next-generation Internet protocol, IPv6 fixes the problem of dealing 
with a limited number of available IPv4 addresses. 
IPv6 guidelines
Some Navigator 2 screens allow you to enter IPv6 addresses, as well as 
IPv4 addresses. This section provides guidelines when using IPv6 addresses 
with Navigator 2. 
						

							Understanding IP addressesD–5
Hitachi Storage Navigator Modular 2 User’s Guide
Hitachi Storage Navigator Modular 2 graphical interface
Table D-1 lists the Pv6 support conditions for the Hitachi Storage Navigator 
Modular 2 (Navigator 2) graphical interface.
IPv6 link-local addresses
Based on RFC 2462, all IPv6 nodes automatically configure a link-local 
address for each interface. By default, the IPv6 protocol for the supported 
Microsoft Windows operating systems in Table D-1 on page D-5 configure 
link-local addresses for each interface that corresponds to an installed 
Ethernet network interface card (NIC). Link-local addresses have the prefix 
FE80::/64. The last 64 bits of the IPv6 address is referred to as the interface 
identifier. It is derived from the 48-bit Media Access Channel (MAC) address 
of the NIC.
To create the IPv6 interface identifier from the 48-bit (6-byte) Ethernet MAC 
address:
• The hexadecimal digits 0xFF-FE are inserted between the third and 
fourth bytes of the MAC address.
• The Universal/Local bit (the second low-order bit of the first byte of the 
MAC address) is complemented. If it is a 1, it is set to 0; if it is a 0, it is 
set to 1. 
Table D-1:  Microsoft Operating Systems That Support IPv6 
Operating SystemSystem PackIPv6 Support
Windows 2000 Service Pack 3/ 
Service Pack 4Not supported
Windows XP Service Pack 2 Although the IPv6 protocol can be used by 
installing Microsoft TCP/IP version6, 
Navigator 2 does not support it because the 
Web browser cannot use the IPv6 literal 
address in colon-delimited hexadecimal 
notation.
Windows Server 
2003 (x86)Service Pack 1 Supported
Windows Server 
2003 (x86)Service Pack 2 Supported
Windows Server 
2003 R2 (x86)Service Pack 1 Supported
Windows Server 
2003 R2 (x64)Service Pack 1 Supported
Windows Vista (x86) Service Pack 1 Supported
Windows Server 
2008 (x86)Service Pack 1 Supported
Windows Server 
2008 (x64)Service Pack 1 Supported 
						

							D–6Understanding IP addresses
Hitachi Storage Navigator Modular 2 User’s Guide
For example, for the MAC address of 00-60-08-52-F9-D8:
• The hexadecimal digits 0xFF-FE are inserted between 0x08 (the third 
byte) and 0x52 (the fourth byte) of the MAC address, forming the 64-
bit address of 00-60-08-FF-FE-52-F9-D8.
• The Universal/Local bit, the second low-order bit of 0x00 (the first 
byte) of the MAC address, is complemented. The second low-order bit 
of 0x00 is 0 which, when complemented, becomes 1. The result is that 
for the first byte, 0x00 becomes 0x02. 
As a result, the IPv6 interface identifier that corresponds to the Ethernet 
MAC address of 00-60-08-52-F9-D8 is 02-60-08-FF-FE-52-F9-D8.
The link-local address of a node is the combination of the prefix FE80::/64 
and the 64-bit interface identifier expressed in colon-hexadecimal notation. 
As a result, the link-local address of this example node, with the prefix 
FE80::/64 and the interface identifier 02-60-08-FF-FE-52-F9-D8, is 
FE80::260:8FF:FE52:F9D8.
You can view your link local address using the netsh interface ipv6 show 
interface command. When you run this command without any additional 
parameters, a list similar to the following is displayed:
For more detailed output, you can designate a connection name as a 
command parameter (for example, netsh interface ipv6 show interface 
“Local Area Connection 2). Using the interface parameter (with either 
an interface name or an interface index number) results in the following 
output, which includes the link local address for the connection:
NOTE:If you use IPv6 addresses with your array, we recommend you set 
IP addresses manually on the Navigator 2 Set up Management Ports 
screen. If you select Use DHCP in the Navigator 2 Set up Management Port 
screen, the IPv6 address changes if you replace arrays, since the IPv6 
address is created based on the array’s MAC address. This will require you 
to perform the Navigator 2 search array and registration.
TIP:For the range of the IPv6 address set manually, use the global unicast 
address 2001::/16.
Idx 
___Met 
___MTU 
___State 
__________Name 
__________
501500ConnectedLocal Area Connection
401500ConnectedLocal Area Connection 2
311280Connected6to4 Tunneling Pseudo-Interface
201280ConnectedAutomatic Tunneling Pseudo-Interface
101500ConnectedLoopback Pseudo-Interface 
						

							Understanding IP addressesD–7
Hitachi Storage Navigator Modular 2 User’s Guide
In this example, Interface 4 is an interface that corresponds to an installed 
Ethernet adapter with a link-local address of FE80::2C0:4FFF:FE19:BAD3.
Router discovery
IPv6 solves many problems related to the interaction between nodes that 
are attached to the same link. To accomplish this, an IPv6 host “advertises” 
its presence, various link parameters, and various Internet parameters 
using router discovery — an exchange of Router Solicitation and Router 
Advertisement messages — to ascertain additional addresses and 
configuration settings. 
To accomplish this, routers “advertise” their presence, various link 
parameters, and various Internet parameters. Routers advertise either 
periodically, or in response to a router solicitation message. Router 
advertisements contain prefixes that are used for on-link determination or 
address configuration, a suggested hop limit value, and other purposes.
If you need to change the contents of a router advertisement for a host 
attached to the array, use the command set Router Lifetime and specify 
an expiration date of 0 to disable the previous router advertisement. 
Otherwise, you will have to perform the Navigator 2 search array and 
registration.
Temporary addresses
Computers running Microsoft Windows Vista or Windows Server 2008 by 
default generate random interface IDs for non-temporary autoconfigured 
IPv6 addresses, including public and link-local addresses, instead of EUI-64-
Interface 4: Local Area Connection 2
Addr Type  DAD State  Valid Life   Pref. Life   Address
---------  ---------- ------------ ------------ -----------------------------
Temporary  Preferred    6d4h41m33s     4h38m46s 3ffe:2900:d005:f282:4063:32a8:5c81:62f2
Temporary  Deprecated   5d4h44m24s           0s 3ffe:2900:d005:f282:cd74:3dd7:857b:b57
Temporary  Deprecated   4d4h47m16s           0s 3ffe:2900:d005:f282:d880:d193:f2dd:d929
Temporary  Deprecated    3d4h50m7s           0s 3ffe:2900:d005:f282:7482:2f05:8129:54ba
Temporary  Deprecated   2d4h52m59s           0s 3ffe:2900:d005:f282:d530:25de:57b:7ee0
Temporary  Deprecated   1d4h55m50s           0s 3ffe:2900:d005:f282:c58c:4290:22c6:7b3b
Temporary  Deprecated     4h58m42s           0s 3ffe:2900:d005:f282:8464:acf0:8393:cf6
Public     Preferred  29d23h57m19s  6d23h57m19s fec0::f282:2c0:4fff:fe19:bad3
Public     Preferred  29d23h57m19s  6d23h57m19s 3ffe:2900:d005:f282:2c0:4fff:fe19:bad3
Link       Preferred      infinite     infinite fe80::2c0:4fff:fe19:bad3
Connection Name          : Local Area Connection 2
GUID                     : {433F15CA-E3FD-4DE4-B3FF-7EF4B30CA4E7}
State                    : Connected
Metric                   : 0
Link MTU                 : 1500 bytes
True Link MTU            : 1500 bytes
Current Hop Limit        : 64
Reachable Time           : 4h43m20s
Base Reachable Time      : 8h20m
Retransmission Interval  : 16m40s
DAD Transmits            : 1
DNS Suffix               : example.microsoft.com
Zone ID for Link         : 4
Zone ID for Site         : 1
Uses Neighbor Discovery  : Yes
Sends RAs               : No
Forwards Packets         : No
Link-Layer Address       : 00-c0-4f-19-ba-d3 
						

							D–8Understanding IP addresses
Hitachi Storage Navigator Modular 2 User’s Guide
based interface IDs. As a public IPv6 address is a global address that is 
registered in DNS and is typically used by server applications for incoming 
connections, such as a Web server. 
This default setting can cause many temporary addresses to be registered 
in the hot, increasing processing times. Therefore, we recommend you 
check the temporary addresses and, if there are many, disable them.
To check whether a temporary addresses is enabled or disabled, type the 
following command from the command prompt. 
To disable temporary addresses, type the following command: 
Type the following command to return them to Enabled. 
Connection methods
The following examples show connections between the array and the 
computer in which Navigator 2 has been installed.
Example 1
Figure D-4 shows a configuration where a computer with Navigator 2 and 
the computer have the same IPv6 addresses.
 
Figure D-4:  Sample Configuration 1
In this configuration:
• The array uses 2000/tcp and 28355/tcp to communicate with Navigator 
2. If the array is connected directly to a computer, but cannot 
communicate through the router, the router may have blocked ports. In 
this case, configure the router to permit 2-way communication to ports. C:\> netsh interface ipv6 show privacy
C:\> netsh interface ipv6 set privacy disable
C:\> netsh interface ipv6 set privacy enable