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Port selection for Async replication
Hi All,
Customer has all 4 ports on the Integrated IO module configured for IP.
I have a couple of questions on picking ports for async replication over IP and for iSCSI host connections.
- For async replication, do we have to use port #2 on both SPA/SPB, or we can pick any ports?
- Also for async replication, can we use multiple ports on each SP or only one is allowed?
- in this case, if the customer is to do sync replication, which port is required?
- I assume there is not restriction on which port to be used for iSCSI?
Thanks in advance!
| Name | Io Module | SP | Port | MTU (Bytes) | Speed (Gbps) | MAC Address | Connector Type |
| SP A Ethernet Port 2 | Integrated | SP A | 2 | 1500 | 00:60:16:A5:2A:9B | RJ45 | |
| SP A Ethernet Port 3 | Integrated | SP A | 3 | 1500 | 00:60:16:A5:2A:9A | RJ45 | |
| SP A Ethernet Port 4 | Integrated | SP A | 4 | 1500 | 00:60:48:52:76:93 | LC | |
| SP A Ethernet Port 5 | Integrated | SP A | 5 | 1500 | 00:60:48:52:76:92 | LC |
DELL_ChrisHolloway
125 Posts
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July 9th, 2019 07:00
- For async replication, do we have to use port #2 on both SPA/SPB, or we can pick any ports?
You can use any physical port for async replication.
- Also for async replication, can we use multiple ports on each SP or only one is allowed?
You can use LACP/FSN on the port to provide resilience and/or additional bandwidth.
- in this case, if the customer is to do sync replication, which port is required?
Sync replication is done over FC only, and uses the lowest numbered FC port in the array.
- I assume there is not restriction on which port to be used for iSCSI?
No you can use any IP port for iSCSI. Some ports and modules use iSCSI offload and some do not though, check the Performance Best Practice Guide for information.
Check the replication white paper, most of the above is covered: https://www.dellemc.com/resources/en-us/asset/white-papers/products/storage/h15088-dell_emc_unity-replication_technologies.pdf
Rainer_EMC
8.6K Posts
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July 10th, 2019 06:00
well - there is one restriction
since ISCSI doesnt support link aggregation you cannot use devices with lacp for ISCI
see the Unity NAS capabilities white paper for more info