Sun Microsystems Virtual Tape Library manual Port zoning hard zoning, WWPN2

SAN

Failed VTL server node Client

Active VTL server node A

Active VTL server node B

I

	*
2
N
P
W
W

T

T

WWPN6

		A
		e
	n
o
Z
		Client B

I

Zone B WWPN4

Port zoning (hard zoning)

A hard‐zoned SAN maps initiator to target using a physical port address. This port‐ to‐port zoning establishes a fixed, physical route through the SAN. So, since each SAN zone can contain only one initiator and one target, you must provide two zones for each initiating client. The figure below shows a hard‐zoned SAN before VTL failover:

SAN

Active VTL server node A	WWPN2	Zone A	Client A
			port1
	port2

Standby VTL server node B port3

C e n o Z

Standby VTL server node A port5

port6

Active VTL server node B

ZoneD

	I
Zone B	port4

Client B

As the above figure shows:

■one zone defines the path to the primary VTL server node

■the other zone defines the path to the standby server.

96267 • G Chapter 2 Understanding VTL Zoning 17