178 Managing virtual fabrics
Figure 15
Logical Switches connected to form Logical Fabrics
The ISLs between the Logical Switches are
dedicated ISLs
because they carry traffic only for a single
Logical Fabric. In
Figure 14
, Fabric 128 has two switches (the default Logical Switches), but they cannot
communicate with each other because they have no ISLs between them and they cannot use the ISLs
between the other Logical Switches.
NOTE:
If you connect two Logical Switches with different FIDs, the link between the switches segments.
Logical Fabric and ISL sharing
Another way to connect Logical Switches is using extended ISLs and base switches.
When you divide a chassis into Logical Switches, you can designate one of the switches to be a base
switch. A
base switch
is a special Logical Switch that is used for interconnecting the physical chassis. A
base switch has the following properties:
•
ISLs connected through the base switch can be used for communication among the other Logical
Switches.
•
For FC-FC routing, legacy EX_Ports must be connected to the base switch and no other Logical Switch.
•
Base switches do not support direct device connectivity. A base switch can have only E_Ports, VE_Ports,
EX_Ports, or VEX_Ports, but no F_Ports.
•
The base switch provides a common address space for communication between different Logical
Fabrics.
•
A base switch can be configured for the preferred domain ID just like a non-Virtual Fabrics switch.
•
You can have only one base switch in a physical chassis.
A base switch can be connected to other base switches through a special ISL, called a
shared ISL
or
extended ISL
(XISL). The XISL is used to share traffic among different Logical Fabrics.
Fabric formation is not based on connectivity, but on the FIDs of the Logical Switches.
Figure 16
shows two physical chassis divided into Logical Switches. Each chassis has one base switch. An
ISL connects the two base switches. This ISL is an extended ISL (XISL) because it connects base switches.
Fabric 128
Fabric 1
Fabric 15
Fabric 8
SW1
SW8
SW4
SW7
SW3
SW6
SW2
SW5
Содержание A7533A - Brocade 4Gb SAN Switch Base
Страница 1: ...HP StorageWorks Fabric OS 6 2 administrator guide Part number 5697 0016 Edition May 2009 ...
Страница 24: ...24 ...
Страница 99: ...Fabric OS 6 2 administrator guide 99 ...
Страница 100: ...100 Managing user accounts ...
Страница 118: ...116 Configuring standard security features ...
Страница 164: ...162 Configuring advanced security features ...
Страница 234: ...232 Installing and maintaining firmware ...
Страница 268: ...266 Administering advanced zoning ...
Страница 284: ...282 Configuring Enterprise class platforms ...
Страница 292: ...290 Routing traffic ...
Страница 294: ...292 Interoperability for merged SANs ...
Страница 302: ...300 Configuring the Distributed Management Server ...
Страница 334: ...332 iSCSI gateway service ...
Страница 340: ...338 Administering NPIV ...
Страница 407: ...Fabric OS 6 2 administrator guide 405 ...
Страница 408: ...406 Using the FC FC routing service ...
Страница 438: ...434 Administering extended fabrics ...
Страница 460: ...456 Administering ISL trunking ...
Страница 498: ...494 Configuring and monitoring FCIP extension services 556200 Bps 30s avg 491394 Bps lifetime avg ...
Страница 516: ...512 FICON fabrics ...
Страница 526: ...522 Configuring and monitoring FICON Extension Services ...
Страница 540: ...536 Configuring the PID format ...
Страница 544: ...540 Understanding legacy password behavior ...
Страница 546: ...542 Mixed fabric configurations for non merge SANs ...
Страница 550: ...546 Migrating from an MP Router to a 400 MP Router ...
Страница 558: ...554 Inband Management ...
Страница 572: ...568 ...