Overlay Vsans; About Overlay Vsans; Configuring Overlay Vsans - Cisco MDS 9000 series Configuration Manual

Overlay VSANs

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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Overlay VSANs
This section describes overlay VSANs and how to configure them.
This section includes the following topics:
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About Overlay VSANs

VSANs enable deployment of larger SANs by overlaying multiple logical SANs, each running its own
instance of fabric services, on a single large physical network. This partitioning of fabric services
reduces network instability by containing fabric reconfiguration and error conditions within an
individual VSAN. VSANs also provide the same isolation between individual VSANs as physically
separated SANs. Traffic cannot cross VSAN boundaries and devices may not reside in more than one
VSAN. Because each VSAN runs separate instances of fabric services, each VSAN has its own zone
server and can be zoned in exactly the same way as SANs without VSAN capability.

Configuring Overlay VSANs

To configure an overlay VSAN, follow these steps:
Add the VSAN to the VSAN database on all switches in the fabric.
Step 1
Create a VSAN interface for the VSAN on all switches in the fabric. Any VSAN interface belonging to
Step 2
the VSAN has an IP address in the same subnet. Create a route to the IPFC cloud on the IP side.
Step 3 Configure a default route on every switch in the Fibre Channel fabric pointing to the switch that provides
NMS access.
Configure the default gateway (route) and the IPv4 address on switches that point to the NMS (see
Step 4
Figure
Cisco MDS 9000 Family NX-OS IP Services Configuration Guide
5-12
switch(config)# no arp 172.2.0.1
Use the clear arp command to delete all entries from the ARP table. The ARP table is empty by
default.
switch# clear arp-cache
About Overlay VSANs, page 5-12
Configuring Overlay VSANs, page 5-12
5-4).
Chapter 5 Configuring IP Services
OL-19525-01,Cisco MDS NX-OS Release 4.2(1)