bgp作业

1.配置ip

2.igp协议配置（AS200,AS500）

[r2]ospf 1 rou    
[r2]ospf 1 router-id 2.2.2.2
[r2-ospf-1]a 0
[r2-ospf-1-area-0.0.0.0]net 2.2.2.2 0.0.0.0
[r2-ospf-1-area-0.0.0.0]net 24.0.0.2 0.0.0.0
[r2-ospf-1-area-0.0.0.0]net 192.168.2.1 0.0.0.0
[r2-ospf-1-area-0.0.0.0]int l1
[r2-LoopBack1]ospf net    
[r2-LoopBack1]ospf network-type bro    
[r2-LoopBack1]ospf network-type broadcast 
 

[r3]int l1
[r3-LoopBack1]ospf net b
[r3-LoopBack1]ospf 1 rou    
[r3-LoopBack1]q
[r3]ospf 1 rou     
[r3]ospf 1 router-id 3.3.3.3
[r3-ospf-1]a 0
[r3-ospf-1-area-0.0.0.0]net 3.3.3.3 0.0.0.0
[r3-ospf-1-area-0.0.0.0]net 192.168.3.1 0.0.0.0
[r3-ospf-1-area-0.0.0.0]net 34.0.0.3 0.0.0.0
 

[r4]int l1
[r4-LoopBack1]ospf net b
[r4-LoopBack1]q
[r4]ospf 1 rou 4.4.4.4
[r4-ospf-1]a 0
[r4-ospf-1-area-0.0.0.0]net 4.4.4.4 0.0.0.0
[r4-ospf-1-area-0.0.0.0]net 192.168.4.1 0.0.0.0
[r4-ospf-1-area-0.0.0.0]net 24.0.0.4 0.0.0.0
[r4-ospf-1-area-0.0.0.0]net 34.0.0.4 0.0.0.0
 

[r9]int l 1
[r9-LoopBack1]ospf net b
[r9-LoopBack1]q
[r9]ospf 1 rou 9.9.9.9
[r9-ospf-1]a 0
[r9-ospf-1-area-0.0.0.0]net 9.9.9.9 0.0.0.0
[r9-ospf-1-area-0.0.0.0]net 192.168.9.1 0.0.0.0
[r9-ospf-1-area-0.0.0.0]net 109.0.0.9 0.0.0.0
 

[r10]int l 1
[r10-LoopBack1]ospf net b
[r10-LoopBack1]q
[r10]ospf 1 rou 10.10.10.10
[r10-ospf-1]a 0
[r10-ospf-1-area-0.0.0.0]net 10.10.10.10 0.0.0.0
[r10-ospf-1-area-0.0.0.0]net 192.168.10.1 0.0.0.0
[r10-ospf-1-area-0.0.0.0]net 109.0.0.10 0.0.0.0
 

检查：dis ospf peer b   ,   dis ospf routing 

3.BGP配置

[r1]bgp 100
[r1-bgp]rou 1.1.1.1
[r1-bgp]peer 12.0.0.2 as    
[r1-bgp]peer 12.0.0.2 as-number 200
[r1-bgp]peer 13.0.0.3 as-path-filter
[r1-bgp]peer 13.0.0.3 as-number 200
 

[r2]bgp 200
[r2-bgp]rou    
[r2-bgp]route-select
[r2-bgp]router-id 2.2.2.2
[r2-bgp]peer 12.0.0.1 as    
[r2-bgp]peer 12.0.0.1 as-number 100
[r2-bgp]peer 3.3.3.3 as    
[r2-bgp]peer 3.3.3.3 as-path-filter
[r2-bgp]peer 3.3.3.3 as-number 200
[r2-bgp]peer 4.4.4.4 as    
[r2-bgp]peer 4.4.4.4 as-path-filter
[r2-bgp]peer 4.4.4.4 as-number 200

[r2-bgp]peer 3.3.3.3 con    
[r2-bgp]peer 3.3.3.3 connect-interface l0    
[r2-bgp]peer 3.3.3.3 connect-interface l0
[r2-bgp]peer 4.4.4.4 con    
[r2-bgp]peer 4.4.4.4 connect-interface l0

[r3]bgp 200
[r3-bgp]rou    
[r3-bgp]route-select
[r3-bgp]router-id 3.3.3.3
[r3-bgp]peer 13.0.0.1 as    
[r3-bgp]peer 13.0.0.1 as-number 100
[r3-bgp]peer 36.0.0.6 as    
[r3-bgp]peer 36.0.0.6 as-path-filter
[r3-bgp]peer 36.0.0.6 as-number 300
[r3-bgp]peer 2.2.2.2 as    
[r3-bgp]peer 2.2.2.2 as-path-filter
[r3-bgp]peer 2.2.2.2 as-number 200
[r3-bgp]peer 4.4.4.4 as    
[r3-bgp]peer 4.4.4.4 as-path-filter
[r3-bgp]peer 4.4.4.4 as-number 200
[r3-bgp]peer 2.2.2.2 conn     
[r3-bgp]peer 2.2.2.2 connect-interface l0
[r3-bgp]peer 4.4.4.4 conn    
[r3-bgp]peer 4.4.4.4 connect-interface l0
 

[r4]bgp 200
[r4-bgp]rou    
[r4-bgp]route-select
[r4-bgp]router-id 4.4.4.4
[r4-bgp]peer 45.0.0.5 as    
[r4-bgp]peer 45.0.0.5 as-number
[r4-bgp]peer 45.0.0.5 as-path-filter
[r4-bgp]peer 45.0.0.5 as-number 300
[r4-bgp]peer 47.0.0.7 as    
[r4-bgp]peer 47.0.0.7 as-path-filter
[r4-bgp]peer 47.0.0.7 as-number 400
[r4-bgp]peer 2.2.2.2 connect-interface l0
[r4-bgp]peer 3.3.3.3con    
[r4-bgp]peer 3.3.3.3 con    
[r4-bgp]peer 3.3.3.3 connect-interface l0
 

[r5]bgp 300
[r5-bgp]rou 5.5.5.5
[r5-bgp]peer 45.0.0.4 as    
[r5-bgp]peer 45.0.0.4 as-number 200
 

[r6]bgp 300
[r6-bgp]rou 6.6.6.6
[r6-bgp]peer 36.0.0.3 as    
[r6-bgp]peer 36.0.0.3 as-number 200
[r6-bgp]peer 67.0.0.7 as    
[r6-bgp]peer 67.0.0.7 as-path-filter
[r6-bgp]peer 67.0.0.7 as-number 400
[r6-bgp]peer 69.0.0.9 as    
[r6-bgp]peer 69.0.0.9 as-path-filter
[r6-bgp]peer 69.0.0.9 as-number 500
 

[r7]bgp 400
[r7-bgp]rou 7.7.7.7
[r7-bgp]peer 47.0.0.4 as    
[r7-bgp]peer 47.0.0.4 as-number 200
[r7-bgp]peer 67.0.0.6 as    
[r7-bgp]peer 67.0.0.6 as-path-filter
[r7-bgp]peer 67.0.0.6 as-number 300
[r7-bgp]peer 78.0.0.8 as    
[r7-bgp]peer 78.0.0.8 as-path-filter
[r7-bgp]peer 78.0.0.8 as-number 500
[r7-bgp]peer 107.0.0.10 as    
[r7-bgp]peer 107.0.0.10 as-path-filter
[r7-bgp]peer 107.0.0.10 as-number 500
 

[r8]bgp 500
[r8-bgp]rou 8.8.8.8
[r8-bgp]peer 78.0.0.7 as    
[r8-bgp]peer 78.0.0.7 as-number 400
 

[r9]bgp 500
[r9-bgp]rou 9.9.9.9
[r9-bgp]peer 69.0.0.6 as    
[r9-bgp]peer 69.0.0.6 as-number 300
[r9-bgp]peer 10.10.10.10 as    
[r9-bgp]peer 10.10.10.10 as-path-filter
[r9-bgp]peer 10.10.10.10 as-number 500
[r9-bgp]peer 10.10.10.10 con    
[r9-bgp]peer 10.10.10.10 connect-interface l    
[r9-bgp]peer 10.10.10.10 connect-interface LoopBack 0

[r10]bgp 500
[r10-bgp]rou 10.10.10.10
[r10-bgp]peer 107.0.0.7 as    
[r10-bgp]peer 107.0.0.7 as-number 400
[r10-bgp]peer 9.9.9.9 as    
[r10-bgp]peer 9.9.9.9 as-path-filter
[r10-bgp]peer 9.9.9.9 as-number 500
[r10-bgp]peer 9.9.9.9 con    
[r10-bgp]peer 9.9.9.9 connect-interface l0
查看：<r1>dis bgp peer

4.BGP路由发布

[r1]bgp 100
[r1-bgp]net 192.168.1.0 24
 

[r2]bgp 200
[r2-bgp]net 192.168.2.0 24
[r2-bgp]net 192.168.3.0 24
[r2-bgp]net 192.168.4.0 24

[r3]ip ip-prefix aa permit 192.168.0.0 16 greater-equal 24 less-equal 24 
[r3]route-policy aa permit node 10
Info: New Sequence of this List.
[r3-route-policy]if-match ip-prefix aa
[r3-route-policy]q
[r3]bgp 200
[r3-bgp]import-route ospf 1 route-policy aa
[r3-bgp]dis bgp routing-table 
 

[r4]ip ip-prefix aa permit 192.168.0.0 16 greater-equal 24 less-equal 24
[r4]route-policy aa permit node 10
Info: New Sequence of this List.
[r4-route-policy]if-match ip-prefix aa
[r4-route-policy]q
[r4]bgp 200
[r4-bgp]import-route ospf 1 route-policy aa
[r4-bgp]dis bgp routing-table 
 

[r5]bgp 300
[r5-bgp]net 192.168.5.0 24
[r6]bgp 300
[r6-bgp]net 192.168.6.0 24
[r7]bgp 400
[r7-bgp]net 192.168.7.0 24
[r8]bgp 500
[r8-bgp]net 192.168.8.0 24
[r9]ip ip-prefix aa permit 192.168.0.0 16 greater-equal 24 less-equal 24
[r9]route-policy aa permit node 10
Info: New Sequence of this List.
[r9-route-policy]if-match ip-prefix aa
[r9-route-policy]q
[r9]bgp 500
[r9-bgp]import-route ospf 1 route-policy aa
[r9-bgp]dis bgp rou    
[r9-bgp]dis bgp routing-table 

[r10]ip ip-prefix aa permit 192.168.0.0 16 greater-equal 24 less-equal 24
[r10]route-policy aa permit node 10
Info: New Sequence of this List.
[r10-route-policy]
[r10-route-policy]if-match ip-prefix aa
[r10-route-policy]q
[r10]bgp 500
[r10-bgp]import-route ospf 1 route-policy aa

[r10-bgp]peer 107.0.0.7 allow-as-loop 2 -----允许as号重复一次

[r10-bgp]peer 9.9.9.9 allow-as-loop 2

[r10-bgp]peer 9.9.9.9 next-hop-local

[r9-bgp]peer 69.0.0.6 allow-as-loop 2
[r9-bgp]peer 10.10.10.10 next-hop-local

[r2-bgp]peer 3.3.3.3 next-hop-local
[r2-bgp]peer 4.4.4.4 next    
[r2-bgp]peer 4.4.4.4 next-hop-invariable
[r2-bgp]peer 4.4.4.4 next-hop-local

[r3]bgp 200
[r3-bgp]peer 2.2.2.2 next    
[r3-bgp]peer 2.2.2.2 next-hop-invariable
[r3-bgp]peer 2.2.2.2 next-hop-local
[r3-bgp]peer 4.4.4.4 next    
[r3-bgp]peer 4.4.4.4 next-hop-invariable
[r3-bgp]peer 4.4.4.4 next-hop-local
 

[r4-bgp]peer 2.2.2.2 next-hop-local
[r4-bgp]peer 3.3.3.3 next    
[r4-bgp]peer 3.3.3.3 next-hop-invariable
[r4-bgp]peer 3.3.3.3 next-hop-local

[r5-bgp]peer 45.0.0.4 allow-as-loop 2

[r6-bgp]peer 36.0.0.3 allow-as-loop 2
[r6-bgp]peer 67.0.0.7 allow-as-loop 2
[r6-bgp]peer 69.0.0.9 allow-as-loop 2
 

检验：