April 12, 20251 yr My T440 server has two GbE ports. I can find how to configure them for LAG in Windows or Linux. Presumably if my Linux and Windows are in VMs, UnRaid will need to configure and manage the LAG on the physical Ethernet. I searched on Aggregation, LAG, and Link Aggregation in the unraid manual and found nothing. Can you point me in the right direction?
April 12, 20251 yr 1 hour ago, timg11 said: Can you point me in the right direction? No expert on that, but probably Settings / Network Settings / Bonding
April 14, 20251 yr Keep in mind the protocol you choose must be supported by whatever switch you are connected to. In general however, LAG doesn't provide a significant performance improvement for most use cases.
April 19, 20251 yr Author The use case where I believe it should help is when two different systems are doing file transfers to the Unraid system. The MAC/IP load balancing should allow each system to benefit from both GBE links, giving total throughput higher than a single GBE. So, I'm trying to get LAG working between my Unraid server on a Dell T440 and a Cisco SG200 switch. On the switch, I set up the two ports connected to the T440 eth1 and eth2 as a LAG. In Unraid, I set Enable Bonding=Yes, Bonding Mode=802.3ad. Bonding Members shows eth0, eth1. (the dropdown shows eth0 grayed out, and eth1 with a checked box) I left Enable Bridging as Yes. I assign the bonded interface with a static IPv4. If I plug one of the two Ethernet cables into the switch into a port that is not part of the LAG, it works as expected for a single GBE. If I plug both cables into the two ports defined as the LAG, it does not work at all -- The Unraid static IP does not respond to pings. I can still reach the T440 over the IDRAC, which has a third Ethernet port, and IDRAC is set up as an DHCP client. If I remove the two ports to the T440 from the LAG on the switch, leaving both cables connected to the T440, even with Enable Bonding still Yes in Unraid, the interface starts working (like a single GBE)
April 21, 20251 yr Are your switch ports configured as 802.3ad? sometimes there are other methods, but LACP (802.3ad) is the most common and well supported. I used to use a 4x1gb bond on unraid without issues to feed 6x1gbe clients with good simultaneous throughput and it worked perfectly
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