Should look like this
VLAN1 eth0 of hmx manager
Subnet: 10.99.31.0
Range: 10.99.31.1-126
NetMask: 255.255.255.128
Gateway: 0.0.0.0 the manager can only have one gateway
VLAN2 Eth1 on hmx manager
Subnet: 10.99.31.128
Range: 10.99.31.138-254 should be 10.99.31.129 – 10.99.31.254
NetMask: 255.255.255.128
Gateway: 10.99.31.129