Ivr Limits Summary; Fibre Channel Header Modifications - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual

Inter-VSAN Routing
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
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IVR Limits Summary

Table 23-1
Cisco MDS SAN-OS Release 3.1(x) and 3.2(x),"
configuration limits.
Table 23-1
IVR Feature
IVR zone members
IVR zones
IVR zone sets
IVR service groups

Fibre Channel Header Modifications

IVR works by virtualizing the remote end devices in the native VSAN using a virtual domain. When IVR
is configured to link end devices in two disparate VSANs, the IVR border switches are responsible for
modifying the Fibre Channel headers for all communication between the end devices. The sections of
the Fibre Channel frame headers that are modified include:
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When a frame goes from the initiator to the target, the Fibre Channel frame header is modified such that
the initiator VSAN number is changed to the target VSAN number. If IVR Network Address Translation
(NAT) is enabled, then the source and destination FCIDs are also translated at the edge border switch. If
IVR NAT is not enabled, then you must configure unique domain IDs for all switches involved in the
IVR path.
Cisco MDS 9000 Family CLI Configuration Guide
23-4
Border switch—An IVR-enabled switch that is a member of two or more VSANs. Border switches,
such as the IVR-enabled switch between VSAN 1 and VSAN 4 in
different color-coded VSANs.
Edge switch—A switch to which a member of an IVR zone has logged in. Edge switches are
unaware of the IVR configurations in the border switches. Edge switches need not be IVR enabled.
Autonomous fabric identifier (AFID)—Allows you to configure more than one VSAN in the
network with the same VSAN ID and avoid downtime when enabling IVR between fabrics that
contain VSANs with the same ID.
Service group—Allows you to reduce the amount of IVR traffic to non-IVR-enabled VSANs by
configuring one or more service groups that restrict the traffic to the IVR-enabled VSANs.
summarizes the configuration limits for IVR. See
IVR Configuration Limits
VSAN number
Source FCID
Destination FCID
Chapter 23
Figure
Appendix A, "Configuration Limits for
for a complete list of Cisco MDS NX-OS feature
Maximum Limit
20,000 IVR zone members per physical fabric as
of Cisco SAN-OS Release 3.0(3).
10,000 IVR zone members per physical fabric
prior to Cisco SAN-OS Release 3.0(3).
8000 IVR zones per physical fabric as of Cisco
SAN-OS Release 3.0(3).
2000 IVR zones per physical fabric prior to Cisco
SAN-OS Release 3.0(3).
32 IVR zone sets per physical fabric.
16 service groups per physical fabric.
OL-18084-01, Cisco MDS NX-OS Release 4.x
Configuring Inter-VSAN Routing
23-1, span two or more