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Introduction
to Fibre Channel Technologies and SAN Administration CISCO switches (MDS 9216, MDS 9509)
What
is Fibre Channel? Integrated
set of standards; a high speed serial interface; allows SCSI commands to be
transferred over a storage network; allows for multiple protocols over a single
interface such as IP and SCSI; and supports multiple topologies such as point to
point, arbitrated, loop, and switching. Speed:
two million bytes per second; Distance: Ten kilometers apart. Switches
versus Hub comparison Hub
is limited to 127 devices; limited software management; and Bandwidth per device
diminishes with increased connectivity. On the other hand, switches can support
more than 16 million devices; all protocols; and Bandwidth per device doesn’t
diminish by increasing connectivity. In-band
management and Out-of-band Management Out-of-band
management provides a connection to the network through a supervisor Module
front panel Ethernet port. In-band
management provides IP over Fibre Channel (IPFC) to manage the switches. Type
of Switches – Connectrix MSD 9000 Series Multilayer Swithes: MDS
9216 (is available in 16, 32, and 48 port configurations with multiple slots
numbering from top – slot 1, slot 2…) MDS
9509 Multi-layer Director (provide a large data center storage environment and
contains 2 Supervisor Modules) FC-0
(Defines the data rates; Media; Maximum distance capabilities… Example:
Speed-Media-Transmitter-Distance) FC-1;
FC-2… FC-2
(Flow control and Buffering; Buffer credits: the rules of BB_Credit is
performing switch internally and externally.) WWPN:
World Wide Port Name (Combination of company ID + Symmetrix Serial Number) Network
Configuration: HOST
<-------- scsi ---------> STORAGE Disadvantage
(Speed, Security, one host/port, distance 25 miles) Advantage
(price) HOST
<-------- (PLOGI-FLOGI) HOST
<-------- SWITCH ---------> STORAGE
----------> STORAGE FLOGI:
is used by an N-Port to determine the presence of a fabric, and then exchange
service parameters. PLOGI:
Exchange information such as WWPN; flow control; host address; and frame size. Advantage
(Many host/port, distance 12,500 miles—earth cycle, speed 2Gb/Second, Open
System-FICON, iSCSI, expandability) What
is zoning? A
method to separate and segregate conversations in a Fibre Channel environment;
and it can be done by two methods; -
Port Zoning -
World Wide Port or Node Name (WWPN recommended by EMC) HBA
and FA can be a member of more than one zone. What
is HBA? Host
Bus Adapter in server devices What
is FA? Fibre
Adapter in storage devices Arbitrator
Loop Using
(1 to 16 switches) 16,000,000 devices When
a Fabric is present in the configuration, a Fibre may attach to the following
nodes; Nodes N-Port
(Node port) – Creates and receives frames NL_Port
A Node port within a Loop environment F-Port
(Fabric port) – a port on the switch FL_Port
An interconnect between Fabric and a loop G-Port
(Generic Port) – auto-configures to other port types. E-Port
(Expansion port-ISL Inter Switch Link; links switches together into larger
fabrics) QL_Port
QuickLoop port, Brocade specific allows the port to act as a hub T_Port
Trunk port, Qlogic Specific, same as G_Port SL_Port
Segmented Loop port, Ancor specific, similar to QL_Port What
is Domain ID (DID)? A
unique ID and each switch in a fabric must have a unique Domain ID. Principal
Switch: Each Fabric can have only one Principal Switch; FC-id
(Fibre Channel ID) Tools: CLI
(Command Line Interpreter) Fabric
Manager Device
Manager VSAN
Manager EXEC
Mode Commands –or ?
OSI OLS
Model SFP SSFO DLC
little connection Classes:
Class
1: Class
2: Acknowledgement Class
3: Sent no Acknowledgement Class
4: Gateway Class
5: Class
6: Class
7: Class 8:
SAN
Topology Flow
Control Pack:
Contains Destination address and Source address Domain
ID 8-bits (DID- 1, 139 should uniquely identifies switches) Fibre
Channel ID (Domain ID + Area + PORT #) BB
(Buffer to buffer credit) SYMM
ß-
DWDM -> SYMM SRDF
(Symmetric Remote Data Facility) TF
(Timefinder) HBA
– WWPN (World Wide Port Name), WWNN (World Wide Node Name) Storage
– FA (Fibre Adapter) OSSM
– Open System Support Matrix Zoning Only
One active zone set Port
Zoning Node
Zoning Nt-zone 1ze 2et Sun-zone 2od 1ew VCM
- Volume Configuration Manager PP
- Point to Point WWN
– World Wide Name VCMDB
– Volume Configuration manager Database 1ze 1,5,7,6 2wq 2,3,10,12,9 Control
Center Package SAN
Manager Merging
Fibre Expansion
port (E-port) ISL
- Inter Switch Loop Switches Prefer Subordinate 1
always 254
Default 255
Never copy run start (to save the changes)
Good
Luck! |
