McDATA StorageWorks 2/140 - Director Switch Planning Manual page 176

Implementing SAN Internetworking Solutions
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McDATA Products in a SAN Environment - Planning Manual
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12. Configure R_Ports - For all configured SAN router R_Ports in the
same fabric:
a. The R_Port interconnect modes (McDATA Fabric 1.0 or
Open Fabric 1.0) must be identical. This parameter is set at the
SANvergence Manager application. The corresponding E_Port
interoperability mode must also be identical. This parameter is
set at the director or fabric switch Element Manager
application.
b. The zone policies (No Zone Synchronization or Append IPS
Zones) must be identical. This parameter is set at the
SANvergence Manager application.
c. The error detect time-out values (ED_TOVs) must be identical.
This parameter is set at the director or fabric switch Element
Manager application.
d. The resource allocation time-out values (RA_TOVs) must be
identical. This parameter is set at the director or fabric switch
Element Manager application.
e. The port Domain_IDs must be different. This parameter is set
at the SANvergence Manager application.
13. Multi-vendor guidelines - SAN routers support existing multi-
vendor fabrics. However, when building a new fabric, it is good
practice not to mix director and fabric switch vendors within the
same fabric. A homogeneous fabric simplifies operation and fault
isolation.
14. Port zoning - Comply with the following rules and best practices
when using port zoning in a SAN routing environment:
a. When a Fibre Channel fabric connects to a SAN router, port
zoning is implemented per FC-SW2 standard. When
communication between devices in a fabric stays within the
fabric, port zoning works normally.
b. When a router zone policy is set to No Zone Synchronization,
remote devices are not port zoned in a local fabric. This is
because remote entries in the local mSNS are node (device)
WWNs, not port WWNs. For example, when a port-zoned
device in Fabric A is zoned with a device in Fabric B, the
device from Fabric A is WWN zoned. Although router ports
can be port zoned, devices connected to a router port are
propagated to remote fabrics using node (device) WWNs.