如何通过Linux中的specfic接口发送组播数据包

Having tried all possible ways couldn't find a work around for this problem. I have a machine with two interfaces eth0 and eth2. I want all ff38:40:2001:dead:beef:cafe::/96 packets to go on eth2. I tried all the following but when I do ping6 ff38:40:2001:dead:beef:cafe::1 the packets always goes on eth0. Things I have tried and have not worked (i.e., packet still goes out on eth0).Having tried all possible ways couldn't find a