HP StorageWorks 2/16V HP StorageWorks Fabric OS 5.2.x administrator guide (569 - Page 202

Edge SANs connected through a backbone fabric, Front domain consolidation

Page 202 highlights

Figure 10 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 10 Edge SANs connected through a backbone fabric 4/256 SAN Director ISL with B-Series MP Router blade EX_Port 4/256 SAN Director with B-Series MP Router blade EX_Port E_Port Backbone Fabric IFL Edge SAN 1 IFL Edge SAN 2 E_Port = LSAN 25314a Front domain consolidation Fabric OS v5.2.x provides front domain consolidation. With this feature, one front domain from a single FCR is projected to the edge fabric regardless of the number of EX_Ports connected from that router to the edge fabric. The front domain is consolidated only within the FCR switch. Another router connected to the same edge fabric projects a different front domain. The FCR switch is connected to the edge fabrics via EX_Ports or VEX_Ports. On prior FCR releases (XPath v7.1.2, v7.3, v7.4 and Fabric OS v5.1) every EX_Port connecting to an edge fabric projects its own front domain. For example, if there are three EX_Ports connected from the router to the edge fabric, there will be three front domains projected to the edge fabric. Front domain consolidation conserves resources on the FCR switch. Expanded use of FCR switches with multiple EX_Ports connected to the same edge fabric raises the overhead of projecting a front domain for each EX_Port and quickly uses up resources within the edge fabric and resource consumption on the FCR. In previous releases, every EX_Port connected to the same edge fabric had a unique domain and unique domains require separate WWNs. With front domain consolidation, the domain is same for all ports connected to same edge fabric from the FC-FC Router, so in this case the WWN will be the same. Supported configurations and platforms In an edge fabric that contains a mix of AD-capable switches and switches that are not aware of AD, FCR should be connected directly to the AD-capable switch. For more information, see "Use of administrative domains with LSAN Zones and FCR" on page 216. The supported configurations are: • FCR connected to an HP nonsecured fabric • FCR connected to an HP secured fabric • FCR connected to a McDATA Open mode • FCR connected to a McDATA Fabric mode • FCR connected to a HP secured and non secured fabrics with EX_Port trunking enabled • Can interoperate with older FCR switches (XPath v7.4.x and Fabric OS v5.1) 202 Using the FC-FC routing service

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202
Using the FC-FC routing service
Figure 10
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 10
Edge SANs connected through a backbone fabric
Front domain consolidation
Fabric OS v5.2.x provides front domain consolidation. With this feature, one front domain from a single
FCR is projected to the edge fabric regardless of the number of EX_Ports connected from that router to the
edge fabric. The front domain is consolidated only within the FCR switch. Another router connected to the
same edge fabric projects a different front domain.
The FCR switch is connected to the edge fabrics via EX_Ports or VEX_Ports. On prior FCR releases (XPath
v7.1.2, v7.3, v7.4 and Fabric OS v5.1) every EX_Port connecting to an edge fabric projects its own front
domain. For example, if there are three EX_Ports connected from the router to the edge fabric, there will be
three front domains projected to the edge fabric.
Front domain consolidation conserves resources on the FCR switch. Expanded use of FCR switches with
multiple EX_Ports connected to the same edge fabric raises the overhead of projecting a front domain for
each EX_Port and quickly uses up resources within the edge fabric and resource consumption on the FCR.
In previous releases, every EX_Port connected to the same edge fabric had a unique domain and unique
domains require separate WWNs. With front domain consolidation, the domain is same for all ports
connected to same edge fabric from the FC-FC Router, so in this case the WWN will be the same.
Supported configurations and platforms
In an edge fabric that contains a mix of AD-capable switches and switches that are not aware of AD, FCR
should be connected directly to the AD-capable switch. For more information, see ”
Use of administrative
domains with LSAN Zones and FCR
” on page 216.
The supported configurations are:
FCR connected to an HP nonsecured fabric
FCR connected to an HP secured fabric
FCR connected to a McDATA Open mode
FCR connected to a McDATA Fabric mode
FCR connected to a HP secured and non secured fabrics with EX_Port trunking enabled
Can interoperate with older FCR switches (XPath v7.4.x and Fabric OS v5.1)
= LSAN
Edge SAN 2
Edge 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