三层+二层交换机网络VLAN间路由怎么写？

接在二层交换机上的PC 上网正常，ping二层(172.16.4.1)不通，但ping三层(172.16.2.1)和路由器(172.16.0.1)是通的。在二层交换机上ping三层不通，三层ping二层也不通。网上很多资料都说配置了vlanif地址以后默认就可以互通了，也没见过写vlan路由的资料，这到底是怎么个情况。如果要写路由，该怎么写呢？

三层

vlan 1

#

vlan 10

#

vlan 20

#

vlan 30

#

vlan 40

#

dhcp server ip-pool vlan40

 gateway-list 172.16.40.254

 network 172.16.40.0 mask 255.255.255.0

 dns-list 172.16.40.254

#

interface Vlan-interface1

 ip address 172.16.2.1 255.255.255.0

#

interface Vlan-interface30

 ip address 172.16.30.254 255.255.255.0

#

interface Vlan-interface40

 ip address 172.16.40.254 255.255.255.0

#

interface GigabitEthernet1/0/1  #【上行】

port link-mode route

combo enable fiber

ip address 172.16.0.2 255.255.254.0

#

interface GigabitEthernet1/0/2  #【下行】

port link-mode bridge

port link-type trunk

port trunk permit vlan 1 40

combo enable fiber

#

 ip route-static 0.0.0.0 0 172.16.0.1

#

二层

vlan 1

#

vlan 10

#

vlan 20

#

vlan 30

#

vlan 40

#

interface Vlan-interface1

 ip address 172.16.4.1 255.255.254.0

#

interface GigabitEthernet1/0/1  #【接三层】

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 40

 combo enable fiber

#

interface GigabitEthernet1/0/2  #【接PC】

 port link-mode bridge

 port access vlan 40

 combo enable fiber

 ip route-static 0.0.0.0 0 172.16.2.1