本文介绍: 四个网段IP : 192.168.100.0 30192.168.1.0 24192.168.2.0 2410.10.10.0 30。

目录

1、企业分部网络

配置二层VLAN通讯

SW4配置VLAN



interface GigabitEthernet0/0/1
 port link-type trunk
 undo port trunk allow-pass vlan 1
 port trunk allow-pass vlan 10 20

interface GigabitEthernet0/0/2
 port link-type access
 port default vlan 20

interface GigabitEthernet0/0/3
 port link-type access
 port default vlan 10

interface GigabitEthernet0/0/1.1
 dot1q termination vid 10
 ip address 192.168.3.254 255.255.255.0 
 arp broadcast enable

interface GigabitEthernet0/0/1.2
 dot1q termination vid 20
 ip address 192.168.4.254 255.255.255.0 
 arp broadcast enable

R9

ospf 200 router-id 9.9.9.9 
 area 0.0.0.0 
  network 192.168.200.2 0.0.0.0 

R10

ospf 200 router-id 10.10.10.10 
 area 0.0.0.0 
  network 192.168.3.0 0.0.0.255 
  network 192.168.4.0 0.0.0.255 
  network 192.168.200.1 0.0.0.0 

测试设备连通性

ospf 100 router-id 1.1.1.1
 area 0.0.0.0 
  network 1.1.1.1 0.0.0.0 
  network 192.168.100.9 0.0.0.0 
  network 192.168.100.17 0.0.0.0 
ospf 100 router-id 2.2.2.2  
area 0.0.0.0 
  network 2.2.2.2 0.0.0.0 
  network 192.168.100.5 0.0.0.0 
  network 192.168.100.13 0.0.0.0 
ospf 100 router-id 3.3.3.3 
 area 0.0.0.0 
  network 192.168.1.0 0.0.0.255 
  network 192.168.100.1 0.0.0.0 
  network 192.168.100.6 0.0.0.0 
  network 192.168.100.10 0.0.0.0 
ospf 100 router-id 4.4.4.4 
 area 0.0.0.0 
  network 192.168.2.0 0.0.0.255 
  network 192.168.100.2 0.0.0.0 
  network 192.168.100.14 0.0.0.0 
  network 192.168.100.18 0.0.0.0 

ospf 10 router-id 5.5.5.5 
 area 0.0.0.0 
  network 10.10.10.17 0.0.0.0 
  network 10.10.10.21 0.0.0.0 
  network 5.5.5.5 0.0.0.0
ospf 10 router-id 6.6.6.6 
 area 0.0.0.0 
  network 6.6.6.6 0.0.0.0 
  network 10.10.10.18 0.0.0.0 
  network 10.10.10.25 0.0.0.0 

R7宣告

ospf 10 router-id 7.7.7.7 
 area 0.0.0.0 
  network 7.7.7.7 0.0.0.0 
  network 10.10.10.22 0.0.0.0 
  network 10.10.10.26 0.0.0.0 
  network 10.10.10.29 0.0.0.0 
  network 10.10.10.33 0.0.0.0 
ospf 10 router-id 8.8.8.8 
 area 0.0.0.0 
  network 8.8.8.8 0.0.0.0 
  network 10.10.10.30 0.0.0.0 
  network 10.10.10.34 0.0.0.0 

检查设备连通性

[R1]bgp 100
[R1-bgp]peer 2.2.2.2 as-number 100
[R1-bgp]peer 2.2.2.2 connect-interface LoopBack 0

[R2]bgp 100
[R2-bgp]router-id 2.2.2.2
[R2-bgp]peer 1.1.1.1 as-number 100
[R2-bgp]peer 1.1.1.1 connect-interface LoopBack 0
[R5]bgp 200
[R5]router-id 5.5.5.5
[R5-bgp]peer 10.10.10.1 as-number 100
[R5-bgp]peer 10.10.10.9 as-number 100

[R6]bgp 200
[R6]router-id 6.6.6.6
[R6-bgp]peer 10.10.10.13 as-number 100
[R6-bgp]peer 10.10.10.5 as-number 100

[R1]bgp 100
[R1]router-id 1.1.1.1
[R1-bgp]peer 10.10.10.2 as-number 200
[R1-bgp]peer 10.10.10.6 as-number 200

[R2]bgp 100
[R2]router-id 2.2.2.2
[R2-bgp]peer 10.10.10.14 as-number 200
[R2-bgp]peer 10.10.10.10 as-number 200
[R5-bgp]peer 6.6.6.6 as-number 200

[R5-bgp]peer 8.8.8.8 as-number 200
[R5-bgp]peer 7.7.7.7 as-number 200

[R5-bgp]peer 6.6.6.6 connect-interface LoopBack 0
[R5-bgp]peer 7.7.7.7 connect-interface LoopBack 0
[R5-bgp]peer 8.8.8.8 connect-interface LoopBack 0

[R5-bgp]peer 7.7.7.7 next-hop-local
[R5-bgp]peer 8.8.8.8 next-hop-local
[R6-bgp]peer 5.5.5.5 as-number 200
[R6-bgp]peer 5.5.5.5 connect-interface LoopBack 0
[R6-bgp]peer 7.7.7.7 as-number 200
[R6-bgp]peer 7.7.7.7 connect-interface LoopBack 0
[R6-bgp]peer 8.8.8.8 as-number 200
[R6-bgp]peer 8.8.8.8 connect-interface LoopBack 0
[R6-bgp]peer 7.7.7.7 next-hop-local
[R6-bgp]peer 8.8.8.8 next-hop-local
[R7-bgp]peer 5.5.5.5 as-number 200
[R7-bgp]peer 5.5.5.5 connect-interface LoopBack 0
[R7-bgp]peer 6.6.6.6 as-number 200
[R7-bgp]peer 6.6.6.6 connect-interface LoopBack 0
[R7-bgp]peer 8.8.8.8 as-number 200
[R7-bgp]peer 8.8.8.8 connect-interface LoopBack 0
[R8-bgp]peer 7.7.7.7 as-number 200
[R8-bgp]peer 7.7.7.7 connect-interface LoopBack 0
[R8-bgp]peer 7.7.7.7 next-hop-local
[R8-bgp]peer 5.5.5.5 as-number 200
[R8-bgp]peer 5.5.5.5 connect-interface LoopBack 0
[R8-bgp]peer 5.5.5.5 next-hop-local
[R8-bgp]peer 6.6.6.6 as-number 200
[R8-bgp]peer 6.6.6.6 connect-interface LoopBack 0
[R8-bgp]peer 6.6.6.6 next-hop-local

检查设备连通性

[R9-bgp]peer 10.10.10.37 as-number 200
[R8-bgp]peer 10.10.10.38 as-number 100

[R1-bgp]network 192.168.1.0
[R1-bgp]network 192.168.2.0

[R2-bgp]network 192.168.1.0
[R2-bgp]network 192.168.2.0

[R9-bgp]network 192.168.3.0
[R9-bgp]network 192.168.4.0
[R1-ospf-100]import-route bgp type 1 
[R2-ospf-100]import-route bgp type 1 
[R9-ospf-200]import-route bgp type 1 

这个时候路由是不通的,因为AS-by-AS  AS号相同了无法将路由传递给相同的AS

[R1-bgp]peer 10.10.10.2 allow-as-loop
[R1-bgp]peer 10.10.10.6 allow-as-loop 

[R2-bgp]peer 10.10.10.10 allow-as-loop 
[R2-bgp]peer 10.10.10.14 allow-as-loop 

[R9-bgp]peer 10.10.10.37 allow-as-loop 

由于在BGP学来的路由优先级为255,在OSPF学到的BGP路由优先级为150,防止选路不佳,

[R1]bgp 100 
ipv4-family unicast
  preference 140 255 255 

[R2]bgp 100 
ipv4-family unicast
  preference 140 255 255 

1、抓流量
[R1]ip ip-prefix policy-1 index 10 permit 192.168.2.0 24
2、做策略
[R1]route-policy policy-1 permit node 10 
[R1-route-policy]if-match ip-prefix policy-1 
[R1-route-policy]apply cost 10 
[R1]route-policy policy-1 permit node 20 
3、调用
[R1]bgp 100
[R1-bgp]peer 10.10.10.2 route-policy policy-1 export 
[R1-bgp]peer 10.10.10.6 route-policy policy-1 export 
1、抓流量
[R2]ip ip-prefix policy-1 index 10 permit 192.168.1.0 24
2、做策略
[R2]route-policy policy-1 permit node 10 
[R2-route-policy]if-match ip-prefix policy-1 
[R2-route-policy]apply cost 10  --- 修改MAD值
[R2]route-policy policy-1 permit node 20   ---建立空表放通流量
3、调用
[R2]bgp 100
[R2-bgp]peer 10.10.10.10 route-policy policy-1 export 
[R2-bgp]peer 10.10.10.14 route-policy policy-1 export 

[R3]interface GigabitEthernet1/0/0
[R3-GigabitEthernet1/0/0]ospf cost 10

[R4]interface GigabitEthernet 1/0/0
[R4-GigabitEthernet1/0/0]ospf cost 10

检查路由表是否出现负载均衡原先开销一样的时候负载均衡

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