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Fabric OS Administrator’s Guide
53-1002446-01
Logical fabric overview
10
Base switch and extended ISLs
Another way to connect logical switches is to use 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.
•
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). An extended ISL connects base switches. The XISL is used to share traffic
among different logical fabrics.
Fabric formation across an XISL is based on the FIDs of the logical switches.
Figure 25
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.
FIGURE 25
Base switches connected by an XISL
Traffic between the logical switches can now flow across this XISL. The traffic can flow only
between logical switches with the same fabric ID. For example, traffic can flow between logical
switch 2 in chassis 1 and logical switch 6 in chassis 2, because they both have FID 1. Traffic cannot
flow between logical switch 2 and logical switch 7, because they have different fabric IDs (and are
thus in different fabrics).
Base switch
Fabric ID 8
P9
Logical switch 7
Fabric ID 15
P7
Logical switch 6
Fabric ID 1
P4
Logical switch 5
(Default logical switch)
Fabric ID 128
Physical chassis 2
Base switch
Fabric ID 8
P6
Logical switch 3
Fabric ID 15
P5
Logical switch 2
Fabric ID 1
P2
Logical switch 1
(Default logical switch)
Fabric ID 128
P1
Physical chassis 1
P8
P6
P2
P1
XISL
Содержание Fabric OS v7.0.1
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Страница 100: ...62 Fabric OS Administrator s Guide 53 1002446 01 Configuring FLOGI time handling of duplicate PWWN 3 ...
Страница 152: ...114 Fabric OS Administrator s Guide 53 1002446 01 The authentication model using RADIUS and LDAP 5 ...
Страница 214: ...176 Fabric OS Administrator s Guide 53 1002446 01 Management interface security 7 ...
Страница 228: ...190 Fabric OS Administrator s Guide 53 1002446 01 Brocade configuration form 8 ...
Страница 248: ...210 Fabric OS Administrator s Guide 53 1002446 01 Validating a firmware download 9 ...
Страница 334: ...296 Fabric OS Administrator s Guide 53 1002446 01 Setting up TI over FCR sample procedure 12 ...
Страница 360: ...322 Fabric OS Administrator s Guide 53 1002446 01 Encryption and compression example 14 ...
Страница 374: ...336 Fabric OS Administrator s Guide 53 1002446 01 Access Gateway N_Port failover with FA PWWN 16 ...
Страница 404: ...366 Fabric OS Administrator s Guide 53 1002446 01 ...
Страница 430: ...392 Fabric OS Administrator s Guide 53 1002446 01 Ports on Demand 18 ...
Страница 470: ...432 Fabric OS Administrator s Guide 53 1002446 01 Disabling QoS zone based traffic prioritization 21 ...
Страница 502: ...464 Fabric OS Administrator s Guide 53 1002446 01 Buffer credit recovery 23 ...
Страница 544: ...506 Fabric OS Administrator s Guide 53 1002446 01 Displaying the range of output ports connected to xlate domains 24 ...
Страница 554: ...516 Fabric OS Administrator s Guide 53 1002446 01 Fabric configurations for interconnectivity A ...
Страница 572: ...534 Fabric OS Administrator s Guide 53 1002446 01 Hexadecimal overview D ...
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