HP StorageWorks 2/24 FW 07.00.00/HAFM SW 08.06.00 McDATA Products in a SAN Env - Page 153

Tier 2, for additional information.

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Implementing SAN Internetworking Solutions 4 • Tier 2 - To connect SAN islands without physically merging the fabrics, the second tier consists of metropolitan storage area networks (mSANs). SAN routers connect fabrics within a data center or campus to form an mSAN and transmit data between fabrics through router ports (R_Ports). Refer to mSAN Routing for additional information. • Tier 3 - To connect geographically remote fabrics or mSANs, the third tier consists of internetworked storage area networks (iSANs). SAN routers transmit data between mSANs through intelligent ports, using Internet Fibre Channel protocol (iFCP). Refer to iSAN Routing for additional information. Figure 4-2 SAN Routing Hierarchy R_Port technology enables inter-fabric SAN routing within a data center or limited geographic area to create mSANs, while iFCP inter-router links (IRLs) connect distributed, extended-distance Fibre Channel fabrics to create an iSAN. In addition, high-availability SAN routers are connected with IRLs using metropolitan Fibre Channel protocol (mFCP). Figure 4-3 illustrates these concepts. Implementing SAN Internetworking Solutions 4-9

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4
Implementing SAN Internetworking Solutions
4-9
Implementing SAN Internetworking Solutions
•
Tier 2 -
To connect SAN islands without physically merging the
fabrics, the second tier consists of metropolitan storage area
networks (mSANs). SAN routers connect fabrics within a data
center or campus to form an mSAN and transmit data between
fabrics through router ports (R_Ports). Refer to
mSAN Routing
for
additional information.
•
Tier 3 -
To connect geographically remote fabrics or mSANs, the
third tier consists of internetworked storage area networks
(iSANs). SAN routers transmit data between mSANs through
intelligent ports, using Internet Fibre Channel protocol (iFCP).
Refer to
iSAN Routing
for additional information.
Figure 4-2
SAN Routing Hierarchy
R_Port technology enables inter-fabric SAN routing within a data
center or limited geographic area to create mSANs, while iFCP
inter-router links (IRLs) connect distributed, extended-distance Fibre
Channel fabrics to create an iSAN. In addition, high-availability SAN
routers are connected with IRLs using metropolitan Fibre Channel
protocol (mFCP).
Figure 4-3
illustrates these concepts.