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拓扑图

配置IP

[r2]int g0/0/0
[r2-GigabitEthernet0/0/0]ip add 24.0.0.2 24
May 30 2024 14:44:20-08:00 r2 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP 
on the interface GigabitEthernet0/0/0 has entered the UP state. 
[r2-GigabitEthernet0/0/0]int g0/0/1
[r2-GigabitEthernet0/0/1]ip add 12.0.0.2 24
May 30 2024 14:44:36-08:00 r2 %%01IFNET/4/LINK_STATE(l)[1]:The line protocol IP 
on the interface GigabitEthernet0/0/1 has entered the UP state. 
[r2-GigabitEthernet0/0/1]int l0
[r2-LoopBack0]ip add 2.2.2.2 32
[r2-LoopBack0]int l1
[r2-LoopBack1]ip add 192.168.20.1 24
[r2-LoopBack1]ospf  net b

[r5]int g0/0/0
[r5-GigabitEthernet0/0/0]ip add 15.0.0.5 24
May 30 2024 14:50:09-08:00 r5 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP 
on the interface GigabitEthernet0/0/0 has entered the UP state. 
[r5-GigabitEthernet0/0/0]int l0
[r5-LoopBack0]ip add 192.168.10.1 24
[r5-LoopBack0]int l1
[r5-LoopBack1]ip add 192.168.11.1 24
[r5-LoopBack1]int l2
[r5-LoopBack2]ip add 192.168.12.1 24

[r3]int g0/0/0
[r3-GigabitEthernet0/0/0]ip add 34.0.0.3 24
May 30 2024 14:46:35-08:00 r3 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP 
on the interface GigabitEthernet0/0/0 has entered the UP state. 
[r3-GigabitEthernet0/0/0]int g0/0/1
[r3-GigabitEthernet0/0/1]ip add 13.0.0.3 24
May 30 2024 14:46:51-08:00 r3 %%01IFNET/4/LINK_STATE(l)[1]:The line protocol IP 
on the interface GigabitEthernet0/0/1 has entered the UP state. 
[r3-GigabitEthernet0/0/1]int l0
[r3-LoopBack0]ip add 3.3.3.3 32
[r3-LoopBack0]int l1
[r3-LoopBack1]ip add 192.168.30.1 24 
[r3-LoopBack1]ospf net b
[r3-LoopBack1]
[r3]ospf 1 rou 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 192.168.30.1 0.0.0.0
[r3-ospf-1-area-0.0.0.0]net 13.0.0.3 0.0.0.0

bgp

[r1]bgp 123
[r1-bgp]rou	
[r1-bgp]route-select
[r1-bgp]router-id 1.1.1.1
[r1-bgp]peer 15.0.0.5 as 500
[r1-bgp]peer 2.2.2.2 as 123
[r1-bgp]peer 2.2.2.2 con l0
[r1-bgp]peer 2.2.2.2 n	
[r1-bgp]peer 2.2.2.2 next-hop-invariable
[r1-bgp]peer 2.2.2.2 next-hop-local
[r1-bgp]peer  3.3.3.3 as 123
[r1-bgp]peer 3.3.3.3 con l0
[r1-bgp]peer 3.3.3.3 ne	
[r1-bgp]peer 3.3.3.3 next-hop-invariable
[r1-bgp]peer 3.3.3.3 next-hop-local

[r2]bgp 123
[r2-bgp]rou	
[r2-bgp]route-select
[r2-bgp]router-id 2.2.2.2
[r2-bgp]peer 24.0.0.2 as 400
Warning: Local interface is already configured with this address.
[r2-bgp]peer 24.0.0.4 as 400
[r2-bgp]peer 1.1.1.1 as 123
[r2-bgp]peer 1.1.1.1 con l0
[r2-bgp]peer 1.1.1.1 n	
[r2-bgp]peer 1.1.1.1 next-hop-invariable
[r2-bgp]peer 1.1.1.1 next-hop-local
[r2-bgp]net 192.168.20.0 24
[r2-bgp]net 192.168.30.0 24
[r2-bgp]net 192.168.100.0 24
[r2]ip ip-prefix aa permit 192.168.12.0 24
[r2]rou aa p	
[r2]rou aa p
[r2]rou aa permit n	
[r2]rou aa permit node 10
Info: New Sequence of this List.
[r2-route-policy]ip	
[r2-route-policy]if	
[r2-route-policy]if-match ip	
[r2-route-policy]if-match ip
[r2-route-policy]if-match ip-prefix aa
[r2-route-policy]apply cost 200
[r2-route-policy]q
[r2]rou aa permit n 20
Info: New Sequence of this List.
[r2-route-policy]q
[r2]bgp 123
[r2-bgp]peer 24.0.0.4 rou aa export
[r2-bgp]peer 1.1.1.1 a	
[r2-bgp]peer 1.1.1.1 advertise-community

[r4]bgp 400
[r4-bgp]rou 4.4.4.4
[r4-bgp]peer 24.0.0.2 as 123
[r4-bgp]peer 34.0.0.3 as 123
[r4-bgp]net 192.168.1.0 24 
[r4-bgp]net 192.168.2.0 24
[r4-bgp]net 192.168.3.0 24
[r4]ip ip-prefix aa permit 192.168.10.0 24
[r4]route-policy aa per	
[r4]route-policy aa permit n 10
Info: New Sequence of this List.
[r4-route-policy]if	
[r4-route-policy]if-match ip	
[r4-route-policy]if-match ip
[r4-route-policy]if-match ip-prefix aa
[r4-route-policy]aplly preferr	
[r4-route-policy]aplly preferred	
[r4-route-policy]app	
[r4-route-policy]apply pre	
[r4-route-policy]apply preference
[r4-route-policy]apply preferred-value 100
[r4-route-policy]q
[r4]rou aa permit n 20
Info: New Sequence of this List.
[r4-route-policy]q
[r4]bgp 400
[r4-bgp]peer 24.0.0.2 rou	
[r4-bgp]peer 24.0.0.2 route-limit
[r4-bgp]peer 24.0.0.2 route-policy aa im	
[r4-bgp]peer 24.0.0.2 route-policy aa import
r4]rou com permit n 10
Info: New Sequence of this List.
[r4-route-policy]route-policy com permit node 10 
Info: You are overwriting this sequence.
[r4-route-policy] apply community 400:500
[r4-route-policy]q
[r4]bgp 400
[r4-bgp]peer 24.0.0.2 ad	
[r4-bgp]peer 24.0.0.2 advertise-community
[r4-bgp]peer 34.0.0.3 ad
                      ^
Error:Ambiguous command found at '^' position.
[r4-bgp]peer 34.0.0.3 ad	
[r4-bgp]peer 34.0.0.3 advertise-ext-community
[r4-bgp]peer 34.0.0.3 ad	
[r4-bgp]peer 34.0.0.3 advertise-community

[r5]bgp 500
[r5-bgp]rou 5.5.5.5
[r5-bgp]peer 15.0.0.1 as 123
[r5]bgp 500
[r5-bgp]net 192.168.10.0 24
[r5-bgp]net 192.168.11.0 24
[r5-bgp]net 192.168.12.0 24
Enter system view, return user view with Ctrl+Z.
[r5]bgp 200
Error: BGP is already running. The AS is 500.
[r5]q
<r5>sys
Enter system view, return user view with Ctrl+Z.
[r5]op as	
[r5]ip as	
[r5]ip as-path-filter 1 deny ^123$
[r5]ip as-path-filter 1 permit .*
[r5]bgp 500 peer 15.0.0.1 as 1 i	
[r5]bgp 500 peer 15.0.0.1 as 1 im	
[r5]bgp 500 peer 15.0.0.1 as	
[r5]bgp 500 peer 15.0.0.1 as
[r5]bgp 500 
[r5-bgp]peer 15.0.0.1 as	
[r5-bgp]peer 15.0.0.1 as-number
[r5-bgp]peer 15.0.0.1 as-path-filter 1 i	
[r5-bgp]peer 15.0.0.1 as-path-filter 1 import