GBP 大AS互连

时间：2018-03-07 21:47:34 阅读：124 评论：0 收藏：0 [点我收藏+]

不同大AS之间传递路由时候，我们所学习到的相关知识点：

BGP路由传递的特点：
   -IBGP邻居之间传递路由，下一跳不变的；
   -EBGP邻居之间传递路由，下一跳是变的；(指的是大 AS 之间的 EBGP)

如果下一跳不变化，有可能导致的问题是：
    BGP路由的下一跳不可达，导致该路由不是最优的，
    所以该路由是不可以使用的(1.不允许放入路由表； 2.不允许传出去)

针对下一跳不变而导致的路由下一跳不可达的问题的解决方案：
    在 AS 的边界路由器上，对自己的内部邻居使用以下命令

      R6：
        bgp 200
          peer 10.10.8.8 next-hop-local
                -->将去往 10.10.8.8 邻居
                   的路由的下一跳变为自己(10.10.6.6)
R8：
#
interface GigabitEthernet0/0/0
ip address 192.168.86.1 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 192.168.87.1 255.255.255.0
#
interface GigabitEthernet0/0/2
ip address 192.168.1.254 255.255.255.0
#
interface NULL0
#
interface LoopBack0
ip address 10.10.8.8 255.255.255.0
#
bgp 200
peer 10.10.6.6 as-number 200
peer 10.10.6.6 connect-interface LoopBack0
peer 10.10.7.7 as-number 200
peer 10.10.7.7 connect-interface LoopBack0
#
ipv4-family unicast
undo synchronization
network 192.168.1.0
peer 10.10.6.6 enable
peer 10.10.7.7 enable
#
rip 1
network 192.168.86.0
network 192.168.87.0
network 10.0.0.0
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return

R7
#
interface GigabitEthernet0/0/0
ip address 192.168.71.1 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 192.168.87.2 255.255.255.0
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 10.10.7.7 255.255.255.0
#
bgp 200
peer 10.10.8.8 as-number 200
peer 10.10.8.8 connect-interface LoopBack0
peer 192.168.71.2 as-number 100
#
ipv4-family unicast
undo synchronization
peer 10.10.8.8 enable
peer 10.10.8.8 next-hop-local
peer 192.168.71.2 enable
#
rip 1
network 192.168.71.0
network 10.0.0.0
network 192.168.87.0
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return

R6
#
interface GigabitEthernet0/0/0
ip address 192.168.61.1 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 192.168.86.2 255.255.255.0
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 10.10.6.6 255.255.255.0
#
bgp 200
peer 10.10.8.8 as-number 200
peer 10.10.8.8 connect-interface LoopBack0
peer 192.168.61.2 as-number 100
#
ipv4-family unicast
undo synchronization
peer 10.10.8.8 enable
peer 10.10.8.8 next-hop-local
peer 192.168.61.2 enable
#
rip 1
network 192.168.61.0
network 192.168.86.0
network 10.0.0.0
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
R1
#
firewall zone Local
priority 15
#
interface GigabitEthernet0/0/0
ip address 192.168.12.1 255.255.255.0
#
interface GigabitEthernet0/0/1
description PC1 de wangguan
ip address 192.168.61.2 255.255.255.0
#
interface GigabitEthernet0/0/2
ip address 192.168.71.2 255.255.255.0
#
interface NULL0
#
interface LoopBack0
ip address 10.10.1.1 255.255.255.0
#
bgp 64512
router-id 1.1.1.1
confederation id 100
peer 10.10.2.2 as-number 64512
peer 10.10.2.2 connect-interface LoopBack0
peer 192.168.61.1 as-number 200
peer 192.168.71.1 as-number 200
#
ipv4-family unicast
undo synchronization
network 192.168.1.0
peer 10.10.2.2 enable
peer 10.10.2.2 next-hop-local
peer 192.168.61.1 enable
peer 192.168.71.1 enable
#
ospf 1 router-id 1.1.1.1
area 0.0.0.0
network 10.10.1.1 0.0.0.0
network 192.168.12.0 0.0.0.255
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return

R2
#
interface GigabitEthernet0/0/0
ip address 192.168.12.2 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 192.168.23.1 255.255.255.0
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 10.10.2.2 255.255.255.0
#
bgp 64512
router-id 2.2.2.2
confederation id 100
peer 10.10.1.1 as-number 64512
peer 10.10.1.1 connect-interface LoopBack0
peer 10.10.3.3 as-number 64512
peer 10.10.3.3 connect-interface LoopBack0
#
ipv4-family unicast
undo synchronization
peer 10.10.1.1 enable
peer 10.10.1.1 reflect-client
peer 10.10.3.3 enable
#
ospf 1 router-id 2.2.2.2
area 0.0.0.0
network 10.10.2.2 0.0.0.0
network 192.168.12.0 0.0.0.255
network 192.168.23.0 0.0.0.255
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
R3
#
interface GigabitEthernet0/0/0
ip address 192.168.23.2 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 192.168.34.1 255.255.255.0
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 10.10.3.3 255.255.255.0
#
bgp 64512
router-id 3.3.3.3
confederation id 100
confederation peer-as 64513
peer 10.10.2.2 as-number 64512
peer 10.10.2.2 connect-interface LoopBack0
peer 192.168.34.2 as-number 64513
#
ipv4-family unicast
undo synchronization
peer 10.10.2.2 enable
peer 192.168.34.2 enable
#
ospf 1 router-id 3.3.3.3
area 0.0.0.0
network 10.10.3.3 0.0.0.0
network 192.168.23.0 0.0.0.255
network 192.168.34.0 0.0.0.255
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
R4
#
interface GigabitEthernet0/0/0
ip address 192.168.34.2 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 192.168.45.1 255.255.255.0
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 10.10.4.4 255.255.255.0
#
bgp 64513
router-id 4.4.4.4
confederation id 100
confederation peer-as 64512
peer 10.10.5.5 as-number 64513
peer 10.10.5.5 connect-interface LoopBack0
peer 192.168.34.1 as-number 64512
#
ipv4-family unicast
undo synchronization
peer 10.10.5.5 enable
peer 192.168.34.1 enable
#
ospf 1 router-id 4.4.4.4
area 0.0.0.0
network 10.10.4.4 0.0.0.0
network 192.168.34.0 0.0.0.255
network 192.168.45.0 0.0.0.255
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
R5
#
interface GigabitEthernet0/0/0
ip address 192.168.45.2 255.255.255.0
#
interface GigabitEthernet0/0/1
description PC2 de wangguan
ip address 192.168.59.1 255.255.255.0
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 10.10.5.5 255.255.255.0
#
bgp 64513
confederation id 100
peer 10.10.4.4 as-number 64513
peer 10.10.4.4 connect-interface LoopBack0
peer 192.168.59.2 as-number 900
#
ipv4-family unicast
undo synchronization
network 192.168.2.0
peer 10.10.4.4 enable
peer 10.10.4.4 next-hop-local
peer 192.168.59.2 enable
#
ospf 1 router-id 5.5.5.5
area 0.0.0.0
network 10.10.5.5 0.0.0.0
network 192.168.45.0 0.0.0.255
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
R9
#
interface GigabitEthernet0/0/0
ip address 192.168.2.254 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 192.168.59.2 255.255.255.0
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
#
bgp 900
peer 192.168.59.1 as-number 100
#
ipv4-family unicast
undo synchronization
network 192.168.2.0
peer 192.168.59.1 enable
#
rip 1
network 192.168.59.0
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return

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GBP 大AS互连

标签：BGP 互连

原文地址：http://blog.51cto.com/13585616/2083954

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