Can I configure LACP with 2 network ports, one port is going to switch 1 and second port is going to switch2 and have active active configuration so that load is shared across 2 links. switch1 and switch2 are two switches in a Cisco 3750(such as WS-C3750X-48P-S) stack configuration.
Connected host is a Solaris host. I know LACP will work with active active configuration if both ports are connected to same switch and also if both switches are Nexus switch, then if each network port goes to different switch, still we can configure LACP load balancing with Solaris hosts. Your inputs are highly appreciated and thanks in advance.
If your two 3750 Catalysts are stacked together then absolutely yes, you can create an EtherChannel with physical ports being connected to different switches in a single stack. Sometimes, this configuration is called Cross-Stack EtherChannel. All switches in a single stack behave like a single big switch, so from the EtherChannel point of view, its rule of "all ports being connected to a single switch" is not violated.
For most control and data plane protocols and mechanisms including LACP and EtherChannel (Link Aggregation), a stack composed of several Cat3750 switches behaves as a single switch. Therefore, all protocols and mechanisms that you can use towards a single neighbor (such as an EtherChannel) can also be used towards a switch stack.