Connecting two storage systems to replicate volumes
33
Multiple servers/single network
The diagram below shows the rear panel of two MSA 2050 SAN controller enclosures with both I/O and replication
occurring on the same physical network.
Figure 20 Connecting two storage systems for Remote Snap: multiple servers/one switch/one location
The diagram below shows the rear panel of two MSA 2050 SAN controller enclosures with I/O and replication occurring
on different physical networks. Use three switches to enable host I/O and replication. Connect two ports from each
controller module in the left storage enclosure to the left switch. Connect two ports from each controller module in the
right storage enclosure to the right switch. Connect two ports from each controller module in each enclosure to the
middle switch. Use multiple switches to avoid a single point of failure inherent to using a single switch.
Figure 21 Connecting two storage systems for Remote Snap: multiple servers/switches/one location
With the replication configuration shown in the previous figures, Virtual Local Area Network (VLAN) and zoning could be
employed to provide separate networks for iSCSI and FC, respectively. Whether using a single switch or multiple switches
for a particular interface, you can create a VLAN or zone for I/O and a VLAN or zone for replication to isolate I/O traffic
from replication traffic. Since each switch would employ VLANs or zones, the configuration would appear physically as a
single network, while logically, it would function as multiple networks.
6Gb/s
6Gb/s
S
S
A
S
S
A
6Gb/s
6Gb/s
S
S
A
S
S
A
MSA 2050 SAN Storage system
Switch
To host server(s)
MSA 2050 SAN Storage system
I/O switch
To host servers
To host servers
I/O switch
MSA 2050 SAN Storage system
MSA 2050 SAN Storage system
Switch (replication)