Fabric OS Administrator's Guide v7.0.0 (53-1002148-02, June 2011)

Fabric OS Administrator’s Guide 525
53-1002148-02
Appendix
D
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 conversion of the hexadecimal triplet Ox616000
Notice the PID (610600 - bolded) in the nsShow output is in hexadecimal.
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 6 digits into triplets by inserting a space after every 2 digits: 61 06 00
2. Convert each hexadecimal value to a decimal representation:
61 = Domain ID = 97
06 = Area (port number) = 06
00 = Port (ALPA) = 0 (not used in this instance, but is used in loop, shared areas in PID
assignments on blades, NPIV, and Access Gateway devices)
Result: hexadecimal triplet 610600 = decimal triplet 97,06,00
TABLE 89 Decimal to hexadecimal conversion table
Decimal 01 02 03 04 05 06 07 08 09 10
Hex 01 02 03 04 05 06 07 08 09 0a