I am a novice. Please bear with me.
I have a cluster with 4 racks (A,B,C,D). Each rack consists of 25 machines and an ethernet switch. Switch-A and -B are connected via Switch-D (Network Trunk)
I found that the inter-switch bandwidth is limited by the slow trunk connections. (The speed of the network between Switch-A and -B is limited by the ports connected to the Switch-D)
However, there are remaining ports on each switch. Can I increase the network bandwidth between Switch-A and -B by putting more cables between them? (Plugging cat-6 cables to the ports of Switch-A and -B)
I have no idea how to configure the switch. The switch is IBM System Networking RackSwitch G8000.
Where should I start to resolve this issue?