我的 Cisco Packet Tracer 中有一个 ISP 4321 路由器。我NIM-ES2-4在路由器中添加了一个模块，它提供了四个交换端口。现在，我为它们的两个交换机端口配置了两个 VLAN。现在它创建了两个 VLAN，您可以在下面看到，有Vlan10和Vlan11：
Router#show ip interface brief
Interface IP-Address OK? Method Status Protocol
GigabitEthernet0/0/0 unassigned YES unset administratively down down
GigabitEthernet0/0/1 unassigned YES unset administratively down down
GigabitEthernet0/1/0 unassigned YES unset up up
GigabitEthernet0/1/1 unassigned YES unset up up
GigabitEthernet0/1/2 unassigned YES unset up down
GigabitEthernet0/1/3 unassigned YES unset up down
Vlan1 unassigned YES unset administratively down down
Vlan10 10.10.10.1 YES manual up up
Vlan11 10.10.20.1 YES manual up up
我想知道Vlan10和Vlan11是不是两个虚拟Router端口？
如果 Vlan10 和 VLan11 是两个虚拟 Router 端口。我已经在上面配置了IP地址，你可以查看上面的数据。我分配了Vlan10to GigabitEthernet0/1/0，Vlan11to GigabitEthernet0/1/1，都是access模式。
但现在我无法从10.10.10.2ping 10.10.20.1：
Router>ping 10.10.20.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.20.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
中心路由器（Router11）的路由如下：
Router#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
C 10.10.10.0/24 is directly connected, Vlan10
L 10.10.10.1/32 is directly connected, Vlan10
C 10.10.20.0/24 is directly connected, Vlan11
L 10.10.20.1/32 is directly connected, Vlan11
所以我的问题是：
- 中心路由器中的Vlan10和Vlan20是否是两个虚拟路由器接口？
- 为什么Router 10 ping不通Router11？