c8k 转为sdwan模式之后就ping交换机vlan20了，其他常规路由器可以ping通，c8k看不到2.2.2.254的arp，交换机可以看到c8k的2.2.2.1 的arp，接口都是up的，求指教，多谢，详见贴图
交换机：
Switch#show ip interface brief
Interface IP-Address OK? Method Status Protocol
GigabitEthernet0/0 unassigned YES unset up up
GigabitEthernet0/1 unassigned YES unset up up
GigabitEthernet0/2 unassigned YES unset up up
GigabitEthernet0/3 unassigned YES unset up up
GigabitEthernet1/0 unassigned YES unset up up
GigabitEthernet1/1 unassigned YES unset up up
GigabitEthernet1/2 unassigned YES unset up up
GigabitEthernet1/3 unassigned YES unset up up