Q-Logic 16HA Manuel D’Utilisation
Preliminar
y
Introduction
SANbox-16HA Fibre Channel Switch
5-2
Multi-Chassis Fabrics
59005-03 Rev. A
Installer’s/User’s Manual
Three Multi-Chassis Topologies
There are three basic multi-chassis topologies for SANbox Switches: Cascade,
Mesh, and Multistage™.
Mesh, and Multistage™.
The term “cascade” indicates that chassis are connected in a row “one-to-the-
next”. You may optionally have chassis interconnections from the last chassis back
to the first chassis. Any port on a SANbox chassis that is placed in a cascade
topology can be either a user port (a port connected to users) or a T_Port
(connected to other Switch chassis). Connect any SANbox port to another Switch
and the port configures itself as a T_Port. All chassis in a cascade topology have a
Stage Type of Input-Output/Transfer (IO/T) or SL Private Loop.
The default is IO/T.
next”. You may optionally have chassis interconnections from the last chassis back
to the first chassis. Any port on a SANbox chassis that is placed in a cascade
topology can be either a user port (a port connected to users) or a T_Port
(connected to other Switch chassis). Connect any SANbox port to another Switch
and the port configures itself as a T_Port. All chassis in a cascade topology have a
Stage Type of Input-Output/Transfer (IO/T) or SL Private Loop.
The default is IO/T.
The term “mesh” indicates that each chassis has at least one T_Port directly
connected to each other chassis (each chassis connected to each other chassis).
Any port on a SANbox chassis that is placed in mesh topology can be either a user
port (connected to users) or a T_Port (connected to other Switch chassis). Connect
any SANbox port to another Switch and the port configures itself as a T_Port. All
chassis in a mesh topology have a Stage Type of Input-Output/Transfer (IO/T). The
default is IO/T.
connected to each other chassis (each chassis connected to each other chassis).
Any port on a SANbox chassis that is placed in mesh topology can be either a user
port (connected to users) or a T_Port (connected to other Switch chassis). Connect
any SANbox port to another Switch and the port configures itself as a T_Port. All
chassis in a mesh topology have a Stage Type of Input-Output/Transfer (IO/T). The
default is IO/T.
A Multistage Switch consists of chassis configured in two different stage types, an
Input-Output/Transfer (IO/T) stage type, and a Cross-Connect (CC) stage type.
Two or more chassis with the IO/T stage type supply user ports to connect to the
users, and T_Ports that connect to one or more chassis with the CC stage type. The
chassis with the CC stage type supply interconnections for the T_Ports. Any
SANbox chassis can function as an IO/T stage type or as a CC stage type. Switch
management allows you to designate the stage type of any chassis as IO/T or CC.
The default stage type for any chassis is IO/T. Connect any port on a chassis with
an IO/T stage type to another chassis and the port configures itself as a T_Port. All
ports on a CC stage type are T_Ports
Input-Output/Transfer (IO/T) stage type, and a Cross-Connect (CC) stage type.
Two or more chassis with the IO/T stage type supply user ports to connect to the
users, and T_Ports that connect to one or more chassis with the CC stage type. The
chassis with the CC stage type supply interconnections for the T_Ports. Any
SANbox chassis can function as an IO/T stage type or as a CC stage type. Switch
management allows you to designate the stage type of any chassis as IO/T or CC.
The default stage type for any chassis is IO/T. Connect any port on a chassis with
an IO/T stage type to another chassis and the port configures itself as a T_Port. All
ports on a CC stage type are T_Ports
NOTE:
Use your SANbox Switch chassis in any of these topologies, but do not mix the
topologies in the same fabric. That is, use your chassis in a Cascade, or Mesh,
or Multistage but do not use a combination of topologies in the same fabric.
Use your SANbox Switch chassis in any of these topologies, but do not mix the
topologies in the same fabric. That is, use your chassis in a Cascade, or Mesh,
or Multistage but do not use a combination of topologies in the same fabric.