The traffic routes on both the ISP’s ( ISP A, ISP B). If any ISP Link
goes down the traffic will shift to another ISP
******************** Config ************************
Router 1
R1:
router bgp 4500
no synchronization
bgp log-neighbor-changes
network 1.0.0.0
neighbor 210.26.12.21 remote-as 4500
neighbor 210.26.12.38 remote-as 4500
neighbor 210.26.12.42 remote-as 4500
no auto-summary
!
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Router 2
R2:
R2:
router bgp 4500
no synchronization
bgp log-neighbor-changes
network 2.0.0.0
neighbor 210.26.12.25 remote-as 4500
neighbor 210.26.12.30 remote-as 4500
neighbor 210.26.12.41 remote-as 4500
no auto-summary
!
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
!
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Router 3
R3:
router bgp 4500
no synchronization
bgp log-neighbor-changes
network 3.0.0.0
neighbor 88.88.88.1 remote-as 100
neighbor 210.26.12.22 remote-as 4500
neighbor 210.26.12.22 next-hop-self
neighbor 210.26.12.29 remote-as 4500
neighbor 210.26.12.29 next-hop-self
no auto-summary
!
router bgp 4500
no synchronization
bgp log-neighbor-changes
network 4.0.0.0
neighbor 77.77.77.1 remote-as 200
neighbor 210.26.12.26 remote-as 4500
neighbor 210.26.12.26 next-hop-self
neighbor 210.26.12.37 remote-as 4500
neighbor 210.26.12.37 next-hop-self
no auto-summary
!
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Router 5
R5:
router bgp 100
no synchronization
bgp log-neighbor-changes
network 5.0.0.0
neighbor 55.55.55.1 remote-as 400
neighbor 88.88.88.2 remote-as 4500
neighbor 99.99.99.1 remote-as 500
no auto-summary
!
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Router 6
R6:
R6:
router bgp 200
no synchronization
bgp log-neighbor-changes
network 6.0.0.0
neighbor 77.77.77.2 remote-as 4500
neighbor 100.100.100.1 remote-as 400
no auto-summary
!
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Router BB1
BB1
BB1
router bgp 500
no synchronization
bgp log-neighbor-changes
network 7.0.0.0
network 172.25.11.0 mask 255.255.255.0
neighbor 99.99.99.2 remote-as 100
no auto-summary
!
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Router BB2
BB2
router bgp 400
no synchronization
bgp log-neighbor-changes
network 8.0.0.0
network 166.24.10.0 mask 255.255.255.0
neighbor 55.55.55.2 remote-as 100
neighbor 100.100.100.2 remote-as 200
no auto-summary
!
*************************Complete*************************
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