- I have 2 Dell R710 servers, running Hyper-V 2019 (free).
- Both have a 4-port Broadcomm built-in network card, as well as a second PCIe Broadcomm 4-port card (identical chips) for a total of 8x 1gig interfaces.
- The first port of the built-in is for LAN traffic, basically so I can connect to them from LAN.
- The next 3 ports are for iSCSI/Heartbeat.
- All 4 ports of the expansion card are for Sync.
- Each port is in its own subnet between the servers, so port 2 on the integrated is 192.168.242.0/29, .1 for node 1 and .2 for node 2.
[*] I have disabled the firewall rules for the "private" network profile and forced the networks to "private", as they come up as "public" by default in windows, not sure if there is something I should be doing differently when setting up direct ethernet links so that they are not "unidentified" and classified as "public" by the OS...
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I have enabled jumbo frames on all 7 adapters used in this test, and tested/verified them with
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ping -f -l 8972
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Set-NetAdapterAdvancedProperty -RegistryKeyword "*JumboPacket" -RegistryValue 9014
Ping fails on forced fragmenting for any size greater than 8972, I suspect overhead in the packet header(s)? Not sure exactly.
Normal bandwidth seems OK; I have run iperf between the nodes over each connection and getting ~995 mbits/s with 0.001% loss with parameters like:
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iperf3 -c 192.168.242.1 -B 192.168.242.2 -u -b 1G -l 8972
Anyone got an idea of what I should look at next? Or if I there is something obvious I might have missed? I thought the instructions were pretty minimal for using the powershell script for 2-node HA device creation, but there was not much to be confused I thought. A few things I don't know anything about, like "ALUAOptimized" I left to "true", but interfaces, file paths, size/sector size/ etc. were all pretty self-explanatory. I am probably going to uninstall free and re-install using a trial license to see if the management UI gives me any more insight. Thanks in advance to anyone who helps!