组网要求：
1. Server1及Server2是两种不同业务的服务器，分别处于两个VLAN：10及20。PC1要求能够访问到Server1及Server2；
2. 当网络正常时，PC1访问Server1的流量走Router>SW1>SW3>Server1这条路径，并且往返路径一致，而PC1访问Server2的流量则走Router>SW2>SW3>Server2这条路径并且也要求来回路径一致；
3. 当SW1发生故障或者SW1连接Router的链路DOWN掉时，要求PC访问Server1的流量能够自动切换到SW2；同样的当SW2发生故障时，PC访问Server2的流量要能够自动切换到SW1；
4. SW1、SW2、SW3三台交换机构成一个二层环路，运行MSTP防止环路；
5. SW1及SW2为汇聚交换机，Server1和Server2的网关在这两台设备上；
6. SW1 、 SW2 及 Router 运 行 ospf ； SW1 及 SW2 的 RouterID 分 别 为 192.168.255.11 及192.168.255.12，Router的RouterID为192.168.255.1。
一、eNSP详解视频：
二、IP设置：
PC1:192.168.1.1/24，网关：192.168.1.254
Server1:vlan10,192.168.10.1/24,网关：192.168.10.254
Server2:vlan20,192.168.20.1/24,网关：192.168.20.254
SW1：vlanif201:192.168.201.1/24
vlanif203:192.168.203.1/24
vlanif10:192.168.10.253/24
VRRP 10 virtual-ip:192.168.10.254
vlanif20:192.168.20.253/24
VRRP 20 virtual-ip:192.168.20.254
SW2：vlanif202:192.168.202.1/24
vlanif203:192.168.203.2/24
vlanif10:192.168.10.252/24
VRRP 10 virtual-ip:192.168.10.254
vlanif20:192.168.20.252/24
VRRP 20 virtual-ip:192.168.20.254
Router:GE0/0/0:192.168.201.2/24,GE0/0/1:192.168.202.2/24,GE0/0/2:192.168.1.254/24
三、配置步骤：
1. 所有设备完成基础配置
SW3的配置如下：
[SW3] vlan batch 10 20
[SW3] interface GigabitEthernet0/0/1
[SW3-GigabitEthernet0/0/1] port link-type access
[SW3-GigabitEthernet0/0/1] port default vlan 10
[SW3] interface GigabitEthernet0/0/2
[SW3-GigabitEthernet0/0/2] port link-type access
[SW3-GigabitEthernet0/0/2] port default vlan 20
[SW3] interface GigabitEthernet0/0/23
[SW3-GigabitEthernet0/0/23] port link-type trunk
[SW3-GigabitEthernet0/0/23] port trunk allow-pass vlan 10 20
[SW3] interface GigabitEthernet0/0/24
[SW3-GigabitEthernet0/0/24] port link-type trunk
[SW3-GigabitEthernet0/0/24] port trunk allow-pass vlan 10 20
SW1的配置如下：
[SW1] vlan batch 10 20 201 203
[SW1] interface GigabitEthernet0/0/23
[SW1-GigabitEthernet0/0/23] port link-type trunk
[SW1-GigabitEthernet0/0/23] port trunk allow-pass vlan 10 20
[SW1] interface GigabitEthernet0/0/20
[SW1-GigabitEthernet0/0/20] port link-type trunk
[SW1-GigabitEthernet0/0/20] port trunk allow-pass vlan 10 20 203
[SW1] interface GigabitEthernet0/0/21
[SW1-GigabitEthernet0/0/21] port link-type access
[SW1-GigabitEthernet0/0/21] port default vlan 201
[SW1] interface vlanif 10
[SW1-vlanif10] ip adderss 192.168.10.253 24
[SW1] interface vlanif 20
[SW1-vlanif20] ip adderss 192.168.10.252 24
[SW1] interface vlanif 201
[SW1-vlanif201] ip adderss 192.168.201.1 24
[SW1] interface vlanif 203
[SW1-vlanif203] ip adderss 192.168.203.1 24
SW2的配置如下：
[SW2] vlan batch 10 20 202 203
[SW2] interface GigabitEthernet0/0/24
[SW2-GigabitEthernet0/0/24] port link-type trunk
[SW2-GigabitEthernet0/0/24] port trunk allow-pass vlan 10 20
[SW2] interface GigabitEthernet0/0/20
[SW2-GigabitEthernet0/0/20] port link-type trunk
[SW2-GigabitEthernet0/0/20] port trunk allow-pass vlan 10 20 203
[SW2] interface GigabitEthernet0/0/21
[SW2-GigabitEthernet0/0/21] port link-type access
[SW2-GigabitEthernet0/0/21] port default vlan 202
[SW2] interface vlanif 10
[SW2-vlanif10] ip adderss 192.168.10.252 24
[SW2] interface vlanif 20
[SW2-vlanif20] ip adderss 192.168.10.253 24
[SW2] interface vlanif 202
[SW2-vlanif202] ip adderss 192.168.202.1 24
[SW2] interface vlanif 203
[SW2-vlanif203] ip adderss 192.168.203.2 24
Router的配置如下：
[Router] interface GigabitEthernet 0/0/0
[Router-GigabitEthernet0/0/0] ip address 192.168.201.2 24
[Router] interface GigabitEthernet 0/0/1
[Router-GigabitEthernet0/0/1] ip address 192.168.202.2 24
[Router] interface GigabitEthernet 0/0/2
[Router-GigabitEthernet0/0/2] ip address 192.168.1.254 24
PC、Server1及Server2的配置这里不再赘述。
2. 完成SW1、SW2及SW3的MSTP VRRP配置
为了满足题目的需求，我们将VLAN10及VLAN20分别映射到MSTP实例1和实例2，然后将SW1设置为实例1的主根、实例2的次根，而SW2设置为实例2的主根、实例1的次根。同时在SW1及SW2上均部署两组VRRP，在VLAN10上部署的这组VRRP中SW1为Master，而在VLAN20上部署的这组VRRP中SW2为Master。这是典型的Mstp VRRP解决方案。
SW3的配置如下：
#配置MSTP，将vlan10映射到实例1，将vlan20映射到实例2：
[SW3] stp mode mstp
[SW3] stp region-configuration
[SW3-mst-region] region-name huawei
[SW3-mst-region] instance 1 vlan 10
[SW3-mst-region] instance 2 vlan 20
[SW3-mst-region] active region-configuration
[SW3-mst-region] quit
[SW3] stp enable
SW1的配置如下：
[SW1] stp mode mstp
[SW1] stp region-configuration
[SW1-mst-region] region-name huawei
[SW1-mst-region] instance 1 vlan 10
[SW1-mst-region] instance 2 vlan 20
[SW1-mst-region] active region-configuration
[SW1-mst-region] quit
[SW1] stp instance 1 root primary
[SW1] stp instance 2 root secondary
[SW1] stp enable
[SW1] interface Vlanif 10
[SW1-vlanif10] vrrp vrid 10 virtual-ip 192.168.10.254
[SW1-vlanif10] vrrp vrid 10 priority 120
[SW1-vlanif10] vrrp vrid 10 track interface GigabitEthernet 0/0/21 reduced 30
[SW1] interface Vlanif 20
[SW1-vlanif20] vrrp vrid 20 virtual-ip 192.168.20.254
SW2的配置如下：
[SW2] stp mode mstp
[SW2] stp region-configuration
[SW2-mst-region] region-name huawei
[SW2-mst-region] instance 1 vlan 10
[SW2-mst-region] instance 2 vlan 20
[SW2-mst-region] active region-configuration
[SW2-mst-region] quit
[SW2] stp instance 1 root secondary
[SW2] stp instance 2 root primary
[SW2] stp enable
[SW2] interface Vlanif 10
[SW2-vlanif10] vrrp vrid 10 virtual-ip 192.168.10.254
[SW2] interface Vlanif 20
[SW2-vlanif20] vrrp vrid 20 virtual-ip 192.168.20.254
[SW2-vlanif20] vrrp vrid 20 priority 120
[SW2-vlanif20] vrrp vrid 20 track interface GigabitEthernet 0/0/21 reduced 30
完成上述配置后，先做一下基本的验证：
[SW3] display stp brief
MSTID Port Role
STP State
Protection
0 GigabitEthernet0/0/1 DESI
FORWARDING NONE
0 GigabitEthernet0/0/2 DESI
FORWARDING NONE
0 GigabitEthernet0/0/23 ROOT FORWARDING NONE
0 GigabitEthernet0/0/24 DESI FORWARDING NONE
1 GigabitEthernet0/0/23 ROOT FORWARDING NONE
1 GigabitEthernet0/0/24 ALTE DISCARDING NONE
2 GigabitEthernet0/0/23 ALTE DISCARDING NONE
2 GigabitEthernet0/0/24 ROOT FORWARDING NONE
从SW3的生成树接口状态输出可以看到，对于MSTP实例1，SW3的GE0/0/24接口处于丢弃状态，而对于MSTP实例2，SW3的GE0/0/23接口处于丢弃状态。因此VLAN10的流量从SW3的GE0/0/23接口进出，而VLAN20的流量从GE0/0/24接口进出。
[SW1]display vrrp brief
VRID State Interface Type Virtual IP
----------------------------------------------------------------
10 Master Vlanif10 Normal 192.168.10.254
20 Backup Vlanif20 Normal 192.168.20.254
----------------------------------------------------------------
Total:2 Master:1 Backup:1 Non-active:0
SW1的VRRP状态也是正确的，它是VRRP组10的Master，同时也是VRRP组20的Backup。
[SW2]display vrrp brief
VRID State Interface Type Virtual IP
----------------------------------------------------------------
10 Backup Vlanif10 Normal 192.168.10.254
20 Master Vlanif20 Normal 192.168.20.254
----------------------------------------------------------------
Total:2 Master:1 Backup:1 Non-active:0
3. 完成SW1、SW2、SW3及Router的OSPF基础配置
SW1的配置如下：
[SW1] ospf 1 router-id 192.168.255.11
[SW1-OSPF-1] area 0
[SW1-ospf-1-area-0.0.0.0] network 192.168.201.0 0.0.0.255
[SW1-ospf-1-area-0.0.0.0] network 192.168.203.0 0.0.0.255
SW2的配置如下：
[SW2] ospf 1 router-id 192.168.255.12
[SW2-ospf-1] area 0
[SW2-ospf-1-area-0.0.0.0] network 192.168.202.0 0.0.0.255
[SW2-ospf-1-area-0.0.0.0] network 192.168.203.0 0.0.0.255
Router的配置如下：
[Router] ospf 1 router-id 192.168.255.1
[Router-ospf-1] area 0
[Router-ospf-1-area-0.0.0.0] network 192.168.201.0 0.0.0.255
[Router-ospf-1-area-0.0.0.0] network 192.168.202.0 0.0.0.255
[Router-ospf-1-area-0.0.0.0] network 192.168.1.0 0.0.0.255
4. 在SW1、SW2上执行路由重发布及路由策略
SW1的配置如下：
[SW1] route-policy vlanif10and20 permit node 10
[SW1-route-policy] if-match interface vlanif 10
[SW1-route-policy] apply cost 10
[SW1-route-policy] quit
[SW1] route-policy vlanif10and20 permit node 20
[SW1-route-policy] if-match interface vlanif 20
[SW1-route-policy] apply cost 20
[SW1-route-policy] quit
[SW1] ospf 1
[SW1-ospf-1] import-route direct route-policy vlanif10and20
SW2的配置如下：
[SW2] route-policy vlanif10and20 permit node 10
[SW2-route-policy] if-match interface vlanif 10
[SW2-route-policy] apply cost 20
[SW2-route-policy] quit
[SW2] route-policy vlanif10and20 permit node 20
[SW2-route-policy] if-match interface vlanif 20
[SW2-route-policy] apply cost 10
[SW2-route-policy] quit
[SW2] ospf 1
[SW1-ospf-1] import-route direct route-policy vlanif10and20
[Router] display ip routing-table protocol ospf
Destination/Mask Proto
Pre Cost Flags NextHop Interface
192.168.10.0/24 O_ASE 150 10 D 192.168.201.1 GigabitEthernet0/0/0
192.168.20.0/24 O_ASE 150 10 D 192.168.202.1 GigabitEthernet0/0/1
92.168.203.0/24 OSPF 10 2 D 192.168.201.1 GigabitEthernet0/0/0
OSPF 10 2 D 192.168.202.1 GigabitEthernet0/0/1
从Router的路由表可以看出，路由192.168.10.0/24的下一跳是192.168.201.1也就是SW1，而路由192.168.20.0/24的下一跳是192.168.202.1也就是SW2。
5. 测试数据走向
现在我们做几个测试：
PC ping Server1及Server2都已经能够ping通。
PC>tracert 192.168.10.1
traceroute to 192.168.10.1, 8 hops max
(ICMP), press Ctrl C to stop
1 192.168.1.254 16 ms 15 ms <1 ms
2 192.168.201.1 16 ms 31 ms 16 ms
3 192.168.10.1 47 ms 63 ms 47 ms
从PC tracert Server1的回显我们能看出，流量走的是Router>SW1>Server1这条路径。
PC>tracert 192.168.20.1
traceroute to 192.168.20.1, 8 hops max
(ICMP), press Ctrl C to stop
1 192.168.1.254 16 ms 15 ms 16 ms
2 192.168.202.1 15 ms 16 ms 31 ms
3 192.168.20.1 32 ms 46 ms 47 ms
PC访问Server2走的是Router>SW2>Server2这条路径。
再去Server1及Server2上面看看：
Server1>tracert 192.168.1.1
traceroute to 192.168.1.1, 8 hops max
(ICMP), press Ctrl C to stop
1 192.168.10.253 31 ms 31 ms 16 ms
2 192.168.201.2 62 ms 47 ms 47 ms
3 192.168.1.1 62 ms 47 ms 32 ms
Server1访问PC的流量走的路径是：SW1>Router>PC。
Server>tracert 192.168.1.1
traceroute to 192.168.1.1, 8 hops max
(ICMP), press Ctrl C to stop
1 192.168.20.253 47 ms 16 ms 15 ms
2 192.168.202.2 47 ms 47 ms 47 ms
3 192.168.1.1 62 ms 47 ms 31 ms
Server2访问PC的流量走的路径是：SW2>Router>PC。
因此当网络正常时的流量走向就已经满足需求了。现在再看看当网络发生故障时的现象。我们将SW1的GE0/0/21接口shutdown，然后再做几个测试：
PC>tracert 192.168.10.1
traceroute to 192.168.10.1, 8 hops max
(ICMP), press Ctrl C to stop
1 192.168.1.254 15 ms 16 ms <1 ms
2 192.168.202.1 31 ms 16 ms 31 ms
3 192.168.10.1 47 ms 62 ms 79 ms
从PC tracert Server1的回显可以看出，流量切换到了SW2上。
Server1>tracert 192.168.1.1
traceroute to 192.168.1.1, 8 hops max
(ICMP), press Ctrl C to stop
1 192.168.10.252 63 ms 31 ms 47 ms
2 192.168.202.2 93 ms 63 ms 62 ms
3 192.168.1.1 94 ms 78 ms 78 ms
而Server1到PC的流量也切换到了SW2上。至此，整个实验就完成了。
四、SW3的主要配置文件：
#
sysname SW3
#
vlan batch 10 20
#
stp region-configuration
region-name huawei
instance 1 vlan 10
instance 2 vlan 20
active region-configuration
#
interface GigabitEthernet0/0/1
port link-type access
port default vlan 10
#
interface GigabitEthernet0/0/2
port link-type access
port default vlan 20
#
interface GigabitEthernet0/0/23
port link-type trunk
port trunk allow-pass vlan 10 20
#
interface GigabitEthernet0/0/24
port link-type trunk
port trunk allow-pass vlan 10 20
#
return
五、SW1的主要配置文件：
#
sysname SW1
#
router id 192.168.255.11
#
vlan batch 10 20 201 203
#
stp instance 1 root primary
stp instance 2 root secondary
#
stp region-configuration
region-name huawei
instance 1 vlan 10
instance 2 vlan 20
active region-configuration
#
interface Vlanif10
ip address 192.168.10.253 255.255.255.0
vrrp vrid 10 virtual-ip 192.168.10.254
vrrp vrid 10 priority 120
#
interface Vlanif20
ip address 192.168.20.253 255.255.255.0
vrrp vrid 20 virtual-ip 192.168.20.254
#
interface Vlanif201
ip address 192.168.201.1 255.255.255.0
#
interface Vlanif203
ip address 192.168.203.1 255.255.255.0
#
interface GigabitEthernet0/0/20
port link-type trunk
port trunk allow-pass vlan 10 20 203
#
interface GigabitEthernet0/0/21
port link-type access
port default vlan 201
#
interface GigabitEthernet0/0/22
#
interface GigabitEthernet0/0/23
port link-type trunk
port trunk allow-pass vlan 10 20
#
interface GigabitEthernet0/0/24
#
interface NULL0
#
ospf 1
import-route direct route-policy vlanif10and20
area 0.0.0.0
network 192.168.201.0 0.0.0.255
network 192.168.203.0 0.0.0.255
#
route-policy vlanif10and20 permit node 10
if-match interface Vlanif10
apply cost 10
#
route-policy vlanif10and20 permit node 20
if-match interface Vlanif20
apply cost 20
#
return
六、SW2的主要配置文件：
#
sysname SW2
#
router id 192.168.255.12
#
vlan batch 10 20 202 to 203
#
stp instance 1 root secondary
stp instance 2 root primary
#
stp region-configuration
region-name huawei
instance 1 vlan 10
instance 2 vlan 20
active region-configuration
#
interface Vlanif10
ip address 192.168.10.252 255.255.255.0
vrrp vrid 10 virtual-ip 192.168.10.254
#
interface Vlanif20
ip address 192.168.20.252 255.255.255.0
vrrp vrid 20 virtual-ip 192.168.20.254
vrrp vrid 20 priority 120
#
interface Vlanif202
ip address 192.168.202.1 255.255.255.0
#
interface Vlanif203
ip address 192.168.203.2 255.255.255.0
#
interface GigabitEthernet0/0/20
port link-type trunk
port trunk allow-pass vlan 10 20 203
#
interface GigabitEthernet0/0/21
port link-type access
port default vlan 202
#
interface GigabitEthernet0/0/22
#
interface GigabitEthernet0/0/23
#
interface GigabitEthernet0/0/24
port link-type trunk
port trunk allow-pass vlan 10 20
#
interface NULL0
#
ospf 1
import-route direct route-policy vlanif10and20
area 0.0.0.0
network 192.168.202.0 0.0.0.255
network 192.168.203.0 0.0.0.255
#
route-policy vlanif10and20 permit node 10
if-match interface Vlanif10
apply cost 20
#
route-policy vlanif10and20 permit node 20
if-match interface Vlanif20
apply cost 10
#
return
七、Router的主要配置文件：
#
sysname Router
#
router id 192.168.255.1
#
interface GigabitEthernet0/0/0
ip address 192.168.201.2 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 192.168.202.2 255.255.255.0
#
interface GigabitEthernet0/0/2
ip address 192.168.1.254 255.255.255.0
#
interface NULL0
#
ospf 1
area 0.0.0.0
network 192.168.1.0 0.0.0.255
network 192.168.201.0 0.0.0.255
network 192.168.202.0 0.0.0.255
#
return
八、验证结果
在Ruter上查看ospf协议的路由表。
<Router>display ip routing-table protocol ospf
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Public routing table : OSPF
Destinations : 3 Routes : 4
OSPF routing table status : <Active>
Destinations : 3 Routes : 4
Destination/Mask Proto Pre Cost Flags NextHop Interface
192.168.10.0/24 O_ASE 150 10 D 192.168.201.1 GigabitEthernet
0/0/0
192.168.20.0/24 O_ASE 150 10 D 192.168.202.1 GigabitEthernet
0/0/1
192.168.203.0/24 OSPF 10 2 D 192.168.202.1 GigabitEthernet
0/0/1
OSPF 10 2 D 192.168.201.1 GigabitEthernet
0/0/0
OSPF routing table status : <Inactive>
Destinations : 0 Routes : 0
本实验是通过华为模拟器eNSP1.3.00.100版（最新版）完成。该软件还包含CE、CX、NE40E、NE5000E、NE9000E、USG6000V的设备IOS，可完成复杂网络测试，需要该模拟器的朋友，可以转发此文关注小编，私信小编【666】即可获得。
