IBM 2109 Service Guide - Page 78

Remote Switch, Introducing the Remote Switch

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| | Remote Switch | This section provides the following information: | v Introducing the remote switch. | v Installing the remote switch. | v Using the remote switch. | Introducing the Remote Switch | The 2109 Remote Switch is an optionally licensed product that runs on the 2109 | series switches with Fabric OS version 2.2 or later. | The 2109 Remote Switch feature, in conjunction with a compatible fibre-channel to | asynchronous-transfer-mode (ATM) gateway, enables two 2109 fabric switches to | be connected over an ATM connection, with a distance of up to 10 km (6.2 miles) | between each switch and the respective ATM gateway. For the total distance | between ATM gateways, see the gateway specifications. The two switches are | cascaded together to form a fabric that, from the viewpoint of the connected hosts | and storage devices, interact the same as locally connected switches. The | performance limitations depend only on the type of ATM connection used. The 2109 | Remote Switch supports a maximum of two switches in a fabric. Each switch | requires a separate license | The 2109 Remote Switch provides the following features: | v Any-to-any connectivity | A host connected on either the local or Remote Switch can communicate with | storage devices at either location. | v Coordinated fabric services | The remote switch fabric configuration fully supports all fabric services, the same | as a centralized fabric configuration. These services include Distributed Name | Services, Registered State Change Notifications, and Alias Services. | v Distributed management | Access to the management facilities (IBM StorWatch Specialist, Telnet, SNMP, | and SES) is available from either the local or the remote switch. Interconnection | for switch management is routed through the fibre-channel connection; no | additional network connection is required between sites. | v Ability to support multiple interswitch links (ISLs) | The 2109 distributed fabrics user's guide sites that require redundant | configurations can connect multiple E_ports to remote sites by using multiple | gateways. Standard Fabric OSTM routing facilities automatically maximize | throughput by using the E_ports to load shared traffic during normal operation, | with automatic failover and failback during interruption on the WAN connection. | Installing the Remote Switch | A Remote Switch fabric requires two 2109 series switches with Fabric OS version | 2.2 or later installed. The switches must be configured the same. | The installation of the remote switches involves the installation of a separate license | on each of the two switches. Contact your IBM sales representative to obtain a | license key. | You can install a Remote Switch license either through Telnet or through the IBM | StorWatch Specialist. 62 IBM SAN Fibre Channel Switch: 2109 Model S16 Installation and Service Guide

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Remote Switch
This section provides the following information:
v
Introducing the remote switch.
v
Installing the remote switch.
v
Using the remote switch.
Introducing the Remote Switch
The 2109 Remote Switch is an optionally licensed product that runs on the 2109
series switches with Fabric OS version 2.2 or later.
The 2109 Remote Switch feature, in conjunction with a compatible fibre-channel to
asynchronous-transfer-mode (ATM) gateway, enables two 2109 fabric switches to
be connected over an ATM connection, with a distance of
up to
10 km (6.2 miles)
between each switch and the respective ATM gateway. For the total distance
between ATM gateways, see the gateway specifications. The two switches are
cascaded together to form a fabric that, from the viewpoint of the connected hosts
and storage devices, interact the same as locally connected switches. The
performance limitations depend only on the type of ATM connection used. The 2109
Remote Switch supports a maximum of two switches in a fabric. Each switch
requires a separate license
The 2109 Remote Switch provides the following features:
v
Any-to-any connectivity
A host connected on either the local or Remote Switch can communicate with
storage devices at either location.
v
Coordinated fabric services
The remote switch fabric configuration fully supports all fabric services, the same
as a centralized fabric configuration. These services include Distributed Name
Services, Registered State Change Notifications, and Alias Services.
v
Distributed management
Access to the management facilities (IBM StorWatch Specialist, Telnet, SNMP,
and SES) is available from either the local or the remote switch. Interconnection
for switch management is routed through the fibre-channel connection; no
additional network connection is required between sites.
v
Ability to support multiple interswitch links (ISLs)
The 2109 distributed fabrics user’s guide sites that require redundant
configurations can connect multiple E_ports to remote sites by using multiple
gateways. Standard Fabric OSTM routing facilities automatically maximize
throughput by using the E_ports to load shared traffic during normal operation,
with automatic failover and failback during interruption on the WAN connection.
Installing the Remote Switch
A Remote Switch fabric requires two 2109 series switches with Fabric OS version
2.2 or later installed. The switches must be configured the same.
The installation of the remote switches involves the installation of a separate license
on each of the two switches. Contact your IBM sales representative to obtain a
license key.
You can install a Remote Switch license either through Telnet or through the IBM
StorWatch Specialist.
62
IBM SAN Fibre Channel Switch: 2109 Model S16 Installation and Service Guide
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