UCS SAN Config

UCS uses the concept of service proflies for flexibility and mobility .To utilize stateless
ness of the blades you have to use boot from  SAN using FC or iSCSi protocals from ucsm 2.0.
Reason why iSCSI or FC should be used is becoz of block level protocal.We can not use NFS since this file based stroage protocal.

FIber Channel:
Operates in 1,2,4 ,8 and 16 Gb speeds ,Block Level Acess to stroage,servers use HBA to connect to storage Array using optical cables.

Servers are called initiators.Storage array is usually known as targets
To allow the two to comminicate we perform Zoning.You zone one or more initators to one or more targets.
Zoening is done on switches (MDC,Brocade,Macdata).Once you Zone you should also make sure server see the LUN is wants to and mask all the other Lun
using LUN making this is supported by stroage array.

HBA has two part A world Wide Node Name  for HBA and depending on the number of ports on HBA it would have one or two World Wide Port Name.
Example DUAL PORT HBA would have one WWNN and Two WWPN names. When you zone you zone them to WWPN not WWNN and make sure one port goes to one frabric
and other ports goes to another fabric.

Ports types:
N_Ports- Node ports,a port on the end node (Server or stroage array)
E-ports - expanssion Ports ,usaually connect to switches.
F-ports - Fabric ports,ports on a switch that connect N-Ports
Cisco UCS uses a technology known as N_Port ID Virtulization (NPIV).
NPIV allows a single N-Port to have many initators behind it.NPIV is enabled on FC Switch this lets
the FC hosts to see the FI as bunch of WWPN and WWNN like networking End host mode.FI use NPV not on the FC switch.

FC Switching Modes :

FC End host host mode: Uses NPIV,appers to Host as bunch of WWPN numbers.
FC Switching Mode
Fiber channel Port -Channels and Trunking:
Similar to Ethernet port Channels,bind multiple uplinks together if one fails other take over and better
load dsitribution only supported on MDS and Nexus FC Switch.
Trunking is smilar to ethernet Trunks: Allows for multiple VSANs over links.

6100 -- FC ports are located on Expansion Module
6200 -- use slider to ajust the port port on left are ethernet,right are FC and expasion module
FCoE: Fibre Channel encapsulated in ethernet.