BGP第一天实验

最新推荐文章于 2025-12-11 22:46:37 发布

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文章描述了多个路由器（R1-R5）之间的IP接口配置，以及OSPF和BGP协议的设置以实现网络互通。R2和R3建立了OSPF邻居关系，R2、R3、R4和R5配置了BGP进行AS间的通信。此外，R4和R5通过静态路由确保环回接口的可达性。

R1：

interface GigabitEthernet0/0/1

ip address 12.1.1.1 255.255.255.0

interface GigabitEthernet0/0/2

ip address 192.168.1.1 255.255.255.0

interface LoopBack0

ip address 1.1.1.1 255.255.255.0

R2：

interface GigabitEthernet0/0/0

ip address 12.1.1.2 255.255.255.0

interface GigabitEthernet0/0/1

ip address 23.1.1.1 255.255.255.0

interface GigabitEthernet0/0/2

ip address 192.168.2.1 255.255.255.0

interface LoopBack0

ip address 2.2.2.2 255.255.255.255

R3：

interface GigabitEthernet0/0/0

ip address 23.1.1.2 255.255.255.0

interface GigabitEthernet0/0/1

ip address 34.1.1.1 255.255.255.0

interface GigabitEthernet0/0/2

ip address 192.168.3.1 255.255.255.0

interface LoopBack0

ip address 3.3.3.3 255.255.255.255

R4：

interface GigabitEthernet0/0/0

ip address 34.1.1.2 255.255.255.0

interface GigabitEthernet0/0/1

ip address 45.1.1.1 255.255.255.0

interface GigabitEthernet0/0/2

ip address 192.168.4.1 255.255.255.0

interface GigabitEthernet4/0/0

ip address 54.1.1.1 255.255.255.0

interface LoopBack0

ip address 4.4.4.4 255.255.255.255

R5：

interface GigabitEthernet0/0/0

ip address 45.1.1.2 255.255.255.0

interface GigabitEthernet0/0/1

ip address 54.1.1.2 255.255.255.0

interface GigabitEthernet0/0/2

ip address 192.168.5.1 255.255.255.0

interface LoopBack0

ip address 5.5.5.5 255.255.255.255

中间IBGP起osof:

[R2-ospf-1]display this

[V200R003C00]

ospf 1 router-id 2.2.2.2

area 0.0.0.0

network 2.2.2.2 0.0.0.0

network 23.1.1.1 0.0.0.0

network 192.168.2.1 0.0.0.0

[R3-ospf-1]dis th

[V200R003C00]

ospf 1 router-id 3.3.3.3

area 0.0.0.0

network 3.3.3.3 0.0.0.0

network 23.1.1.2 0.0.0.0

network 34.1.1.1 0.0.0.0

network 192.168.3.1 0.0.0.0

[R4-ospf-1]dis th

[V200R003C00]

ospf 1 router-id 4.4.4.4

area 0.0.0.0

network 4.4.4.4 0.0.0.0

network 34.1.1.2 0.0.0.0

network 192.168.4.1 0.0.0.0

为了R4和R5的环回能通，写静态：

R4：

5.5.5.5/32 Static 60 0 RD 45.1.1.2 GigabitEthernet0/0/1

Static 60 0 RD 54.1.1.2 GigabitEthernet4/0/0

R5：

4.4.4.4/32 Static 60 0 RD 45.1.1.1 GigabitEthernet0/0/0

Static 60 0 RD 54.1.1.1 GigabitEthernet0/0/1

写BGP:

[R1-bgp]dis th

[V200R003C00]

bgp 1

router-id 1.1.1.1

peer 12.1.1.2 as-number 2

ipv4-family unicast

undo synchronization

network 192.168.1.0

peer 12.1.1.2 enable

[R2-bgp]dis th

[V200R003C00]

bgp 2

router-id 2.2.2.2

peer 3.3.3.3 as-number 2

peer 3.3.3.3 connect-interface LoopBack0

peer 4.4.4.4 as-number 2

peer 4.4.4.4 connect-interface LoopBack0

peer 12.1.1.1 as-number 1

ipv4-family unicast

undo synchronization

network 192.168.2.0

peer 3.3.3.3 enable

peer 3.3.3.3 next-hop-local

peer 4.4.4.4 enable

peer 4.4.4.4 next-hop-local

peer 12.1.1.1 enable

R 3:

[R3-bgp]dis th

[V200R003C00]

bgp 2

router-id 3.3.3.3

peer 2.2.2.2 as-number 2

peer 2.2.2.2 connect-interface LoopBack0

peer 4.4.4.4 as-number 2

peer 4.4.4.4 connect-interface LoopBack0

ipv4-family unicast

undo synchronization

network 192.168.3.0

peer 2.2.2.2 enable

peer 4.4.4.4 enable

R 4:

[R4-bgp]dis th

[V200R003C00]

bgp 2

router-id 4.4.4.4

peer 2.2.2.2 as-number 2

peer 2.2.2.2 connect-interface LoopBack0

peer 3.3.3.3 as-number 2

peer 3.3.3.3 connect-interface LoopBack0

peer 5.5.5.5 as-number 3

peer 5.5.5.5 ebgp-max-hop 2

peer 5.5.5.5 connect-interface LoopBack0

ipv4-family unicast

undo synchronization

network 192.168.4.0

peer 2.2.2.2 enable

peer 2.2.2.2 next-hop-local

peer 3.3.3.3 enable

peer 3.3.3.3 next-hop-local

peer 5.5.5.5 enable

R5:

[R5-bgp]dis th

[V200R003C00]

bgp 3

router-id 5.5.5.5

peer 4.4.4.4 as-number 2

peer 4.4.4.4 ebgp-max-hop 2

peer 4.4.4.4 connect-interface LoopBack0

ipv4-family unicast

undo synchronization

network 192.168.5.0

peer 4.4.4.4 enable