Operating Environment Software Owner manual

Connectivity services
Connectivity Services provide the underlying building blocks for other SPM services in the way of
assuring connectivity between desired storage and hosts.
Managed networks
Managed networks in SPM refer to networks that SPM is able to actively manage (for example
query for topology, make zoning changes, etc.) which includes Brocade networks and any networks
supported by other SAN Adapters.
Networks with a Zoning State of Zoned and Capability of Automated Zoning have zoning automated
by SPM. SPM actively modifies the underlying networks to create/destroy zones dynamically
depending on the needs of the users and the constraints set in place by the storage administrator.
NOTE:
• If a BNA user's zoning session overlaps with an SPM zoning session for the same fabric, then
SPM's changes will fail and will be automatically retried by SPM.
• Networks that are manually renamed using BNA's GUI after they have been imported into
SPM need to be removed from SPM and then re-imported. All services that were dependent
on these networks must be re-configured and re-activated.
SPM makes certain guarantees of usage of the underlying hardware as follows.
Zoning automation constraints
• SPM requires that users manually create the first zone in a network before SPM will create
any zones. SPM cannot change an open network to a zoned network.
• SPM never destroys or modifies pre-existing zones because SPM does not know the purpose
of these zones. Any zones in your network that were not created by SPM will not be modified
in any way by SPM.
• Because SPM does not destroy pre-existing zones, SPM will never cause the network to go to
an Open zoning state.
• When using the SPM automated zoning capability with HP B-series or Brocade SAN networks,
environments that make use of multiple CMS configurations (either independent or in a
federated configuration) may manage the same HP B-series or Brocade network. In this situation,
however, the set of initiators managed by each instance of SPM must be distinct, therefore
making correlated zones created and managed by each instance of SPM also distinct.
• When using the SPM automated zoning capability with HP B-series or Brocade SAN networks,
SPM can recover from fabric repairs and from fabric re-configuration automatically, but only
as long as the fabric’s identity remains intact. Fabric repairs are fabric changes such as switch
replacement and switch firmware upgrades. Re-configuration changes are fabric switch
configuration changes or additional switches to support datacenter growth or additional
features. In either case SPM will handle the change automatically, as long as the fabric’s
identify as tracked by Brocade’s Network Advisor, remains intact.
Any change, regardless if it is a repair or re-configuration, that is severe enough to change
the identity of the fabric as tracked by Brocade Network Advisor will require administrator
intervention on SPM’s part to recover and will not be automatically handled
Zoning policy
SPM defaults to using the Single Initiator Zoning (SIZ) policy. Only candidates capable of being
connected using the SIZ policy or that are already connected are offered to the user during candidate
generation time. Using the SIZ policy, SPM creates zones on network capable of zoning automation
such that there is a single initiator per zone and only one zone per initiator. However, target
endpoints may be in more than one zone as needed by initiators. For example, the initiator's zone
is expanded to include the new targets as required. Targets that need presented to an initiator are
placed by SPM in that initiator's zone such that the zone may contain one or more targets and
expand or shrink as needed.
70 Working with Brocade Fibre Channel networks