When I configured ETH-TRUNK link between S9300, and Carry MPLS traffic on this virtual link ,But unfortunately , all the MPLS traffic is passing through with the same physical link, it seems that load balance is working on ETH-TRUNK link.
On S9300,we can configure load balance profile for MPLS packets , such as , load balancing based on the top label of MPLS packets.
[Quidway] load-balance-profile test
[Quidway-load-balance-profile-test] mpls field top-label
[Quidway] interface Eth-Trunk 20
[Quidway-Eth-Trunk20] load-balance enhanced profile test
Because ETH-TRUNK distribute traffic to each physical link by hash algorithm, for IP packets it uses” IP address” key words and for NON-IP packets it uses “MAC address” key words. But for MPLS packets ,all the IP address information is concealed by MPLS LABEL ,so by default , this kind of packets were distributed by hash with MAC address.
However ,we can also find that MPLS packets with the same source MAC and destination MAC(the source MAC is corresponding to local VLANIF interface and destination MAC is related to layer 3 interface of another side of ETH-TRUNK ).
That why all the traffic pass trough ETH-TRUNK will be distributed to the same physical link.