IpAddress remoteIp = new IpAddress(Ipv4Address.getDefaultInstance(remoteIpStr));
IpAddress localIp = new IpAddress(Ipv4Address.getDefaultInstance(localIpStr));
IfTunnel tunnel = new IfTunnelBuilder().setTunnelDestination(remoteIp).setTunnelGateway(localIp).setTunnelSource(localIp)
IpAddress remoteIp = new IpAddress(Ipv4Address.getDefaultInstance(remoteIpStr));
IpAddress localIp = new IpAddress(Ipv4Address.getDefaultInstance(localIpStr));
IfTunnel tunnel = new IfTunnelBuilder().setTunnelDestination(remoteIp).setTunnelGateway(localIp).setTunnelSource(localIp)