Example cabling for replication
Simplified versions of controller enclosures are used in the cabling figures to show the host ports that are used for I/O or replication.
• Replication supports FC and iSCSI host interface protocols.
• The 2U enclosure rear panel represents ME4 Series FC and iSCSI host interface ports.
• The 5U84 enclosure rear panel represents ME4 Series FC and iSCSI host interface ports.
• Host ports that are used for replication must use the same protocol (either FC or iSCSI).
• Blue cables show I/O traffic and green cables show replication traffic.
Once the CNC-based systems or 10Gbase-T systems are physically cabled, see the Dell EMC PowerVault ME4 Series Storage System
Administrator’s Guide or online help for information about configuring, provisioning, and using the replication feature.
Single-controller module configuration for replication
Cabling two ME4 Series controller enclosures that are equipped with a single controller module for replication.
Multiple servers, multiple switches, one network
The following diagram shows the rear panel of two controller enclosures with I/O and replication occurring on the same network:
Figure 34. Connecting two storage systems for replication – multiple servers, multiple switches, one network
1.
2U controller enclosures 2. Two switches (I/O)
3. Connection to host servers 4. Switch (Replication)
For optimal protection, use multiple switches for host I/O and replication.
• Connect two ports from the controller module in the left storage enclosure to the left switch.
• Connect two ports from the controller module in the right storage enclosure to the right switch.
• Connect two ports from the controller modules in each enclosure to the middle switch.
Use multiple switches to avoid a single point of failure inherent to using a single switch, and to physically isolate replication traffic from I/O
traffic.
Dual-controller module configuration for replication
Cabling two ME4 Series controller enclosures that are equipped with dual-controller modules for replication.
Multiple servers, one switch, one network
Figure 35. Connecting two ME4 Series 2U storage systems for replication – multiple servers, one switch, and one network shows the rear
panel of two 2U enclosures with I/O and replication occurring on the same network. Figure 36. Connecting two ME4 Series 5U storage
systems for replication – multiple servers, one switch, and one network shows the rear panel of two 5U84 enclosures with I/O and
replication occurring on the same network.
In the configuration, Virtual Local Area Network (VLAN) and zoning could be employed to provide separate networks for iSCSI and FC.
Create a VLAN or zone for I/O and a VLAN or zone for replication to isolate I/O traffic from replication traffic. Either configuration would
be displayed physically as a single network, while logically, either configuration would function as multiple networks.
Cabling for replication
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