Fabric OS Administrator's Guide v6.4.0 (53-1001763-01, June 2010)

Fabric OS Administrator’s Guide 279
53-1001763-01
Admin Domain considerations for Traffic Isolation Zoning
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• Two N_Ports that have the same shared area should not be configured in different TI zones.
This limitation does not apply to E_Ports that use the same shared area on the FC4-48 and
FC8-48 port blades.
• Ports that are in different TI zones cannot communicate with each other if failover is disabled.
• TI zone members that overlap must have the same TI failover policy across all TI zones to which
they belong. That is, if an overlapping member is part of a failover-disabled zone, then it can
belong only to other TI zones where the policy is also failover-disabled; the member cannot
overlap with failover-enabled TI zones.
• TI zones that have members with port index greater than 511 are not supported with Fabric OS
versions earlier than v6.4.0. If such a TI zone and Fabric OS version combination is detected, a
warning is issued. These configurations are not prevented, but their behavior is unpredictable.
Admin Domain considerations for Traffic Isolation Zoning
Note the following if you implement Admin Domains and TI zones:
• TI zones are applicable only in AD0, and the E_Ports that are members of a TI zone must be in
the AD0 device list. Because TI zones must use D,I notation, the AD0 device list must be
declared using D,I notation for ports that are to be used in TI zones.
• A port used in a TI zone should not be a member of multiple Admin Domains.
• Use care if defining TI zones with ports that are shared across Admin Domains because of the
limitation that a given port can appear in only one TI zone.
Best practice: Do not use ports that are shared across Admin Domains in a TI zone.
Virtual Fabric considerations for Traffic Isolation Zoning
This section describes how TI zones work with Virtual Fabrics. See Chapter 10, “Managing Virtual
Fabrics,” for information about the Virtual Fabrics feature, including logical switches and logical
fabrics.
TI zones can be created in a logical fabric like in regular fabrics, with the following exceptions:
• The disable failover option is not supported in logical fabrics that use XISLs.
Although logical switches that use XISLs allow the creation of a TI zone with failover disabled,
this is not a supported configuration. Base switches do not allow the creation of a TI zone with
failover disabled.
• To create a TI zone for a logical fabric that uses XISLs, you must create two TI zones: one in the
logical fabric and one in the base fabric. The combination of TI zones in the base fabric and
logical fabric sets the path through the base fabric for logical switches.
The TI zone in the logical fabric includes the extended XISL (XISL) port numbers, as well as the
F_Ports and ISLs in the logical fabric.
The TI zone in the base fabric reserves XISLs for a particular logical fabric. The base fabric TI zone
should also include ISLs that belong to logical switches participating in the logical fabric.
Figure 44 shows an initiator and target in a logical fabric (FID1). The dotted line indicates a
dedicated path between initiator and target. The dedicated path passes through the base fabric
over an XISL. (Figure 44 shows only physical ISLs, not logical ISLs.) To create the TI zones for this
dedicated path, you must create a TI zone in the logical fabric (FID 1) and one in the base fabric.