How do I route traffic for private network between two Hyper-V?

I have got two Hyper-V hosts connected by external vSwitch. On one host I have few VMs connected to the private vSwitch and few VMs on the another one as well using private vSwitch. Now I would like to make VMs on both Hyper-V hosts visible to each other. I have deployed two RAS servers.

I have configured RIP protocol on external vSwitch on both VMRouters.

I can ping from VMRouter1 external vSwitch IP and private vSwitch IP on VMRouter2 and vice versa.

I cannot ping from VM2 VM1 as well as private vSwitch IP on VMRouter1.

Current configuration Windows Server 2016:

Hyper-V 1

VM1
Private NIC: 10.0.0.1/24
Gateway: 10.0.0.2
VMRoute1
Private NIC: 10.0.0.2/24
External NIC: 10.10.11.0/24

Hyper-V 2

VMRoute2
Private NIC: 10.0.0.3/24
External NIC: 10.10.11.1/24
VM1
Private NIC: 10.0.0.4/24
Gateway: 10.0.0.3