HP Brocade 8/12c Brocade Fabric OS Troubleshooting and Diagnostics Guide - Sup - Page 129

Hexadecimal overview, Example of hexadecimal triplet conversion

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Hexadecimal Appendix B Hexadecimal overview Hexadecimal, also known as hex, is a numeral system with a base of 16, usually written using unique symbols 0-9 and A-F, or a-f. Its primary purpose is to represent the binary code that computers interpret in a format easier for humans to remember. It acts as a form of shorthand, in which one hexadecimal digit takes the place of four binary bits. For example, the decimal numeral 79, with the binary representation of 01001111, is 4F (or 4f) in hexadecimal where 4 = 0100, and F = 1111. Hexadecimal numbers can have either an 0x prefix or an h suffix. The address 0xFFFFFA is the same address as FFFFFAh.This type of address with 6 digits representing 3 bytes, is called a hex triplet. Fibre Channel uses hexadecimal notation in hex triplets to specify well-known addresses and port IDs. Example of hexadecimal triplet conversion Notice the PID in the nsshow output is in hexadecimal, shown in blue in the following example. Switch:admin> nsshow { Type Pid COS PortName NodeName TTL(sec) N 610600; 2,3;10:00:00:00:c9:29:b3:84;20:00:00:00:c9:29:b3:84; na FC4s: FCP NodeSymb: [36] "Emulex LP9002 FV3.90A7 DV5-5.10A10 " Fabric Port Name: 20:08:00:05:1e:01:23:e0 Permanent Port Name: 10:00:00:00:c9:29:b3:84 Port Index: 6 Share Area: No Device Shared in Other AD: No Redirect: No The Local Name Server has 1 entry } 1. Separate the triplets: 61 06 00 2. Convert each hexadecimal value to a decimal representation, using Table 24: 61 = Domain ID = 97 06 = Area (port number) = 06 00 = Port (AL_PA) = 0 (not used in this instance, but is used in loop, NPIV, and Access Gateway devices) Result: hexadecimal triplet 610600 = decimal triplet 97,06,00 Fabric OS Troubleshooting and Diagnostics Guide 109 53-1002150-02

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Fabric OS Troubleshooting and Diagnostics Guide
109
53-1002150-02
Appendix
B
Hexadecimal
Hexadecimal overview
Hexadecimal, also known as hex, is a numeral system with a base of 16, usually written using
unique symbols 0–9 and A–F, or a–f. Its primary purpose is to represent the binary code that
computers interpret in a format easier for humans to remember. It acts as a form of shorthand, in
which one hexadecimal digit takes the place of four binary bits. For example, the decimal numeral
79, with the binary representation of 01001111, is 4F (or 4f) in hexadecimal where 4 = 0100, and
F = 1111.
Hexadecimal numbers can have either an 0x prefix or an h suffix. The address 0xFFFFFA is the
same address as FFFFFAh.This type of address with 6 digits representing 3 bytes, is called a hex
triplet. Fibre Channel uses hexadecimal notation in hex triplets to specify well-known addresses
and port IDs.
Example of hexadecimal triplet conversion
Notice the PID in the nsshow output is in hexadecimal, shown in blue in the following example.
Switch:admin>
nsshow
{
Type Pid
COS
PortName
NodeName
TTL(sec)
N
610600
;
2,3;10:00:00:00:c9:29:b3:84;20:00:00:00:c9:29:b3:84; na
FC4s: FCP
NodeSymb: [36] "Emulex LP9002 FV3.90A7
DV5-5.10A10 "
Fabric Port Name: 20:08:00:05:1e:01:23:e0
Permanent Port Name: 10:00:00:00:c9:29:b3:84
Port Index: 6
Share Area: No
Device Shared in Other AD: No
Redirect: No
The Local Name Server has 1 entry }
1.
Separate the triplets: 61 06 00
2.
Convert each hexadecimal value to a decimal representation, using
Table 24
:
61 = Domain ID = 97
06 = Area (port number) = 06
00 = Port (AL_PA) = 0 (not used in this instance, but is used in loop, NPIV, and Access Gateway
devices)
Result: hexadecimal triplet 610600 = decimal triplet 97,06,00