拓扑说明：CE1上配置VS，虚拟出两个vs，分别为vsA、vsB，其中vsB作为2层接入、vsA作为三层接入，可以看做vsA为核心层、vsB为汇聚层
目的：PC1访问AR1
LSW2模拟线缆，因为ENSP没办法使用线缆直接互联两个VS，只能通过第三台设备实现。
CE使用的ENSP中的CE12800
切换vs使用的命令如：switch virtual-system vsA

CE1的配置：

#
sysname CE1
#
admin
 virtual-system vsA 
  port-mode group
  resource u4route upper-limit 10000
  resource m4route upper-limit 1000
  resource u6route upper-limit 1000
  resource m6route upper-limit 1000
  resource vlan upper-limit 4090
  resource mpls enable
  resource trill enable
  resource mcast enable
  resource vpn-instance upper-limit 4096
  resource cpu weight 5
  resource memory ratio-threshold 100
  resource disk ratio-threshold 100
  assign interface GE1/0/0
  assign interface GE1/0/1
  assign interface GE1/0/2
  assign interface GE1/0/3
  assign interface GE1/0/4
  assign interface GE1/0/5
 virtual-system vsB 
  port-mode group
  resource u4route upper-limit 10000
  resource m4route upper-limit 1000
  resource u6route upper-limit 1000
  resource m6route upper-limit 1000
  resource vlan upper-limit 4090
  resource mpls enable
  resource trill enable
  resource mcast enable
  resource vpn-instance upper-limit 4096
  resource cpu weight 5
  resource memory ratio-threshold 100
  resource disk ratio-threshold 100
  assign interface GE1/0/6
  assign interface GE1/0/7
  assign interface GE1/0/8
  assign interface GE1/0/9
#
return

vsA的配置：

sysname vsA
#
vlan batch 10
#
interface Vlanif10
 ip address 192.168.10.254 255.255.255.0
#
interface MEth0/0/0
 undo shutdown
#
interface GE1/0/0
 undo portswitch
 undo shutdown
 ip address 10.0.12.1 255.255.255.252
#
interface GE1/0/1
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10
#
interface LoopBack0
 ip address 1.1.1.1 255.255.255.255
#
interface NULL0
#
ospf 1 router-id 1.1.1.1
 area 0.0.0.0
  network 1.1.1.1 0.0.0.0
  network 10.0.12.0 0.0.0.3
  network 192.168.10.0 0.0.0.255
#
return

vsB的配置：

#
sysname vsB
#
vlan batch 10
#
interface GE1/0/8
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10
#
interface GE1/0/9
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10
#
return

结果验证：在AR1上可以访问PC1。
ENSP的display virtual-system命令可能有BUG，看不到配置的vs，只能看到admin-vs。
另外就是vs后带外接口也是会虚拟化的