Supported Topologies; Single-Fabric Topology; Cluster Recovery Scenarios; Deleting An Offline Switch From A Cisco Ioa Cluster - Cisco MDS 9000 series Configuration Manual

Appendix B Cluster Management and Recovery Scenarios
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m

Supported Topologies

Cisco IOA supports a single-fabric topology. Multiple modules can be deployed in a Fibre Channel
fabric to easily scale-up performance, to enable simplified load balancing, and to increase availability.
In a typical configuration, one IOA engine per site is required in each IOA cluster.
IOA clusters include designated backup servers, tape libraries, and one or more MDS switches running
Cisco SAN-OS Release 3.2(2c) or alter. One cluster switch must include an IOA engine per site. With
easy-to-use provisioning, traffic between any host and tape on the fabric can utilize the IOA services.
Required Cisco IOA engines are included in the following Cisco products:
•
•

Single-Fabric Topology

The MSM-18/4 Module can be anywhere in the fabric. Cisco IOA does a one-to-one mapping of the
information from the host to the target and forwards the encrypted data to the dedicated HR tape. Cisco
IOA also tracks the barcodes on each encrypted tape and associates the barcodes with the host servers.
Encryption and compression services are transparent to the hosts and storage devices. These services are
available for devices in any virtual SANs (VSANs) in a physical fabric and can be used without rezoning.
In certain topologies, edge switches are interconnected across the WAN. Plan for deployment at the core
and transition of WAN links to core switches for optimal routing.

Cluster Recovery Scenarios

Refer to this section for information on recovery procedures that are used when one or more switches in
a Cisco IOA cluster is offline or when you want to change the master switch assignment from one switch
to another switch.
This section includes the following topics:
•
•
•
•

Deleting an Offline Switch from a Cisco IOA Cluster

To delete an offline switch when one or more switches are offline and the master switch is online, use
these procedures.
On the offline switch (for example, switch2), shut down the cluster by performing this task:
Command
Step 1
switch# config t
Step 2
switch(config)# ioa cluster ABC
switch(config-ioa-cl)# shutdown
OL-20708-01, Cisco MDS NX-OS Release 5.0(1a)
Cisco MDS 9000 Family 18/4-port Multiservice Module (MSM-18/4)
Cisco SSN-16 Module Switch
Deleting an Offline Switch from a Cisco IOA Cluster, page B-5
Deleting a Cisco IOA Cluster with One or More Offline Switches while the Master Switch is Online,
page B-6
Deleting a Cisco IOA Cluster when All Switches Are Offline, page B-7
Reviving a Cisco IOA Cluster, page B-8
Purpose
Enters configuration mode.
Shuts down the ABC cluster on the offline switch.
Cisco MDS 9000 Family I/O Accelerator Configuration Guide
Supported Topologies
B-5