HP StorageWorks Fabric OS 5.3.x administrator guide (5697-0244, November 2009)

Fabric OS 5.3.0 administrator guide 229
Figure 11 shows another metaSAN consisting of a host in Edge SAN 1 connecting to storage in Edge SAN
2 through a backbone fabric connecting two 4/256 SAN Directors, each containing B-Series MP Router
blades.
Figure 11 Edge SANs connected through a backbone fabric
Proxy devices
A 400 MP Router or 4/256 SAN Director with an B-Series MP Router blade achieves interfabric device
connectivity by creating proxy devices (hosts and targets) in attached fabrics that represent real devices in
other fabrics. For example, a host in Fabric 1 can communicate with a target in Fabric 2 as follows:
• A proxy target in Fabric 1 represents the real target in Fabric 2.
• Likewise, a proxy host in Fabric 2 represents the real host in Fabric 1.
The host discovers and sends Fibre Channel frames to the proxy target. The 400 MP Router or 4/256 SAN
Director with an B-Series MP Router blade receives these frames, translates them appropriately, then
delivers them to the de
The target responds by sending frames to the proxy host. Hosts and targets are exported from the edge
SAN to which they are attached and, correspondingly, imported into the edge SAN reached through Fibre
Channel routing. Figure 12 illustrates this concept.
Figure 12 metaSAN with imported devices
= LSAN
Edge SAN 2Edge SAN 1
Backbone
Fabric
4/256 SAN Director
with B-Series
MP Router blade
4/256 SAN Director
with B-Series
MP Router blade
E_Port
E_Port
IFL IFL
EX_Port
EX_Port
ISL
25314a
Fabric 2
Target
Proxy host
(imported device)
Proxy target
(imported device)
Host
Fabric 1
400 MP
Router
E_Port
E_Port
IFL
IFL
EX_Port
25315a