How to separate network interfaces?

Question

iSCSI

Hello.
The win2012r2 server has 3 physical network interfaces, 10Gb (eth0) and 2*1Gb (eth1, eth2).
Mikrotik gateway is registered on eth0, there is Internet. There is no gateway on eth1 and eth2, clients start diskless (on the network) from these interfaces, explicitly specifying the ip-addresses of eth1 and eth2 interfaces when loading.
The question is how else to hard separate eth0-> Internet, eth1, eth2-> LAN, because at full loading of eth0 clients are loaded time in 5 more slowly?

Conventional:
192.168.42.10 - eth0
192.168.42.11 - eth1
192.168.42.12 - eth2

Answer 1

you need to determine what kind of shared resource all these interfaces share. it can be CPU time, bandwidth pci-e channels or something else.
the simplest thing that comes to mind is to try setting stricter interrupt moderation for eth0 and see if it gets better.
but in general, if in general - it is not clear in what relation these adapters are with each other, what they are connected to, etc. there is little information, in short.
it is possible that the bottleneck is not on the server, but on the device to which all three adapters are connected.
Well, addressing from the same subnet for all three adapters is also embarrassing. in some cases it may be justified, in others it may not. in some cases this may lead to your problem, in others it may not.