In-Service Software Upgrade In Cisco Sme - Cisco AJ732A - MDS 9134 Fabric Switch Configuration Manual

Chapter 1 Product Overview
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
Figure 1-3
Email Server
running SAN-OS 3.2
Email tape
Tape devices should be connected to core switches such as an MDS 9500 Series switch or an MDS 9216
Note
or MDS 9222i switch running Cisco SAN-OS Release 3.2(2c) or later, or Cisco NX-OS 4.x.
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-Service Software Upgrade in Cisco SME

In-Service Software Upgrade (ISSU) is a comprehensive, transparent software upgrade capability that
allows you to add new features and services without any disruption to the traffic.
In a cluster, which has the MDS 9222i switch as nodes, if the nodes are not able to communicate, then
the node having the lowest node identifier (node ID) remains in the cluster while the other node leaves
the cluster. However, when an ISSU is performed on a node having the lowest node identifier, a complete
loss of the cluster results since both the nodes leave the cluster.
This undesirable situation is addressed in a two-node cluster as follows:
•
•
•
OL-18091-01, Cisco MDS NX-OS Release 4.x
Cisco Storage Media Encryption: Single-Fabric Topology
Application servers
MDS switch
Compression
library
Tape libraries
The upgrading node sends a message to the other node of the intent to leave the cluster. The
upgrading node can either be a master node or a slave node.
The remaining node remains in the cluster and performs the role of the master node if it was a slave
node. This node continues to remain in the cluster with the quorum intact.
After the ISSU is completed and the switches boots up, the upgraded node rejoins the cluster as a
slave node.
HR Server
Cisco MDS 9500 Series
Cisco MDS 9200 Series
MSM-18/4 module switch with SME
enabled (cluster mode)
Encryption
HR tape
library
Cisco MDS 9000 Family Storage Media Encryption Configuration Guide
About Cisco Storage Media Encryption
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