How to increase the bandwidth for incoming traffic on the server?

Question

Computer networks

Good day.
I have a server running Windows Server 2012 R2 with multiple network interfaces. Naturally, there is a desire to combine them in order to increase the bandwidth of the channel.
But in the process of combining, I encounter the following problem: that when using NIC Teaming (regardless of the operating mode and settings on the switches), that using software from the network manufacturer (Broadcom ACS) we get an increase in speed only for outgoing traffic. The width of the incoming channel remains 1 Gb / s.
What could be the problem? And is this problem solved at all?
PS Server Dell R720
Switch HP 1920-48G
Tried to enable both static and dynamic (LACP) aggregation on the switch - same effect
UPD As it turned out, I solved the wrong problem;)
On the advice of Cool Admin , I fiddled with the settings of the balancing method on the switch, set Src-IP and this partially solved the problem: incoming traffic from two different machines went at a speed of 1 Gb / s), but as it turned out , I had to solve another one:
there are 2 servers, on each 2 network adapters are combined into timings (that is, one formally has a 2Gb / s connection and the other has 2 Gb / s). The task is to make it possible to transfer data between us at such a speed. at the moment this is not possible.
UPD2 The problem in a particular case is solved as follows:
despite the fact that the speed increase is only in one direction (Srv1 -> Srv2),
1) on Srv1 we select the switch independent mode
2) on Srv2, select any of the switch dependent modes
3) on the switch, configure the channel aggregation accordingly and select the Src-MAC balancing mode.
Everything, in this form, we get a speed of 2 Gb / s when copying data from Srv1 to Srv2.
But this solution is not applicable to me, since on Srv1 the Virtual Switch from Hyper-V is also raised above the timing, and as a result. the physical switch sees only 1 mac...

Answer 1

You incorrectly configure the balancing method from the switch side. Change it, specify something from the available choice:
Src-IP
Src-MAC
Src-IP-XOR-Dst-IP
The LACP protocol participates only in the collection of a PAIR (or several lines), but does not participate in how the frames are scatter through the channels, this is configured separately. Look for details in the documentation.
UPD, it is also possible that you need to additionally tune the balancing from the server side, specifying something better than what can be selected via the GUI
UPD2 It is worth noting separately that balancing only affects the distribution of packets from _one side_, i.e. if on the one hand you set it up via Source-IP, on the other hand nothing will change, the parties do not exchange this information, LACP (and a family of similar ones) were created only to unite lines, select timings and tell who is the backup or hotspee line . Not for negotiating balances.

Answer 2

Very little information. If you do not configure port aggregation on the switch, then nothing good will come of this venture. This is the main reason that your "incoming" channel remained as it was 1 Gb / s.

Answer 3

enable LACP on the switch, assemble a group, configure the balancing algorithm.
Each side can have its own algorithm