请问你是想左边到右边走peer-link吗？如果是这样的话vPC Data-Plane Loop Avoidance的机制不允许跨Peer-link的流量还发给VPC的成员端口的。
vPC Data-Plane Loop Avoidance
vPC performs loop avoidance at data-plane layer instead of control plane layer for Spanning Tree Protocol. All logics
are implemented directly in hardware on vPC peer-link ports, avoiding any dependancy to CPU utilization.
vPC peer devices always forward traffic locally when possible. vPC peer-link does not typically forward data
packets and it is usually considered as a control plane extension in a steady state network (vPC peer-link used to
synchronize information between the 2 peer devices as mac address, vPC member state information, IGMP).
vPC loop avoidance rule states that traffic coming from vPC member port, then crossing vPC peer-link is NOT
allowed to egress any vPC member port; however it can egress any other type of port (L3 port, orphan port, …).
The only exception to this rule occurs when vPC member port goes down. vPC peer devices exchange memberport
states and reprogram in hardware the vPC loop avoidance logic for that particular vPC. The peer-link is then used
as backup path for optimal resiliency. Traffic need not ingress a vPC member port for this rule to be applicable. The
vPC loop avoidance rulle exception is depicted in the figure below: 
