LAB 11: BGP

Task

1. Configure IP Addresses as per given in topology.

2. Configure IBGP neighborship as per given in topology. Advertise loopback 1 and loopback 2 in

IBGP.

3. Configure Internal BGP neighbor as per given in topology.

4. Make sure Loopback 3 and loopback 4 introduce in BGP network.

5. R3 to R7 receives all the loopback network information in BGP table. (Verify after completion of

this task).

6. Configuration Sub-AS's in BGP AS 300. Make sure R10 and R12 make neighborship with R8 and

R11.

7. Make sure R1 and R2 advertise all the loopbacks in BGP.

8. Configure EBGP neighborship as per given in topology. Make sure EBGP neighborship is configure

using loopback 1 only.

9. Make sure all routers ping loopback addresses. (Do possible Configuration)

10. On R2, Configure R14 as a best path for Network 3.3.3.0 and R8 as a best path for Network

3.3.4.0.

11. Configure weight as 1440 on R8 to make R7 as a best path for BGP routes.

12. Make sure R7 Receives metric 10000 for Network 2.2.1.0 from R3.

Figure 1 Topology

LAB 11: BGP

Solution

Tasks 2: Configure IBGP neighborship as per given in topology. Advertise loopback 1 and

loopback 2 in IBGP.

R3

router eigrp 100

network 3.3.1.0 0.0.0.255

network 3.3.2.0 0.0.0.255

network 10.0.34.0 0.0.0.255

network 10.0.37.0 0.0.0.255

no auto-summary

R4

router eigrp 100

network 4.4.1.0 0.0.0.255

network 4.4.2.0 0.0.0.255

network 10.0.34.0 0.0.0.255

network 10.0.45.0 0.0.0.255

network 10.0.46.0 0.0.0.255

no auto-summary

R5

router eigrp 100

network 5.5.1.0 0.0.0.255

network 5.5.2.0 0.0.0.255

network 10.0.45.0 0.0.0.255

network 10.0.56.0 0.0.0.255

network 10.0.57.0 0.0.0.255

no auto-summary

R6

router eigrp 100

network 6.6.1.0 0.0.0.255

network 6.6.2.0 0.0.0.255

network 10.0.46.0 0.0.0.255

network 10.0.56.0 0.0.0.255

network 10.0.67.0 0.0.0.255

no auto-summary

LAB 11: BGP

R7

router eigrp 100

network 7.7.1.0 0.0.0.255

network 7.7.2.0 0.0.0.255

network 10.0.37.0 0.0.0.255

network 10.0.57.0 0.0.0.255

network 10.0.67.0 0.0.0.255

auto-summary

R8

router ospf 1

network 8.8.1.0 0.0.0.255 area 0

network 8.8.2.0 0.0.0.255 area 0

network 10.0.80.0 0.0.0.255 area 0

network 10.0.89.0 0.0.0.255 area 0

R9

router ospf 1

network 9.9.1.0 0.0.0.255 area 0

network 9.9.2.0 0.0.0.255 area 0

network 10.0.89.0 0.0.0.255 area 0

R10

router ospf 1

network 10.0.80.0 0.0.0.255 area 0

network 10.0.110.0 0.0.0.255 area 0

network 10.10.1.0 0.0.0.255 area 0

network 10.10.2.0 0.0.0.255 area 0

R11

router ospf 1

network 10.0.110.0 0.0.0.255 area 0

network 10.0.112.0 0.0.0.255 area 0

network 11.11.1.0 0.0.0.255 area 0

network 11.11.2.0 0.0.0.255 area 0

LAB 11: BGP

R12

router ospf 1

network 10.0.112.0 0.0.0.255 area 0

network 12.12.1.0 0.0.0.255 area 0

network 12.12.2.0 0.0.0.255 area 0

R13

router eigrp 200

network 10.0.134.0 0.0.0.255

network 13.13.1.0 0.0.0.255

network 13.13.2.0 0.0.0.255

no auto-summary

R14

router eigrp 200

network 10.0.134.0 0.0.0.255

network 14.14.1.0 0.0.0.255

network 14.14.2.0 0.0.0.255

no auto-summary

Task 3: Configure Internal BGP neighbor as per given in topology. (Task 6 also complete)

R3

router bgp 1100

neighbor 10.0.34.4 remote-as 1100

neighbor 10.0.37.7 remote-as 1100

R4

router bgp 1100

neighbor 10.0.34.3 remote-as 1100

neighbor 10.0.45.5 remote-as 1100

neighbor 10.0.46.6 remote-as 1100

R5

router bgp 1100

neighbor 10.0.45.4 remote-as 1100

neighbor 10.0.56.6 remote-as 1100

neighbor 10.0.57.7 remote-as 1100

LAB 11: BGP

R6

router bgp 1100

neighbor 10.0.46.4 remote-as 1100

neighbor 10.0.56.5 remote-as 1100

neighbor 10.0.67.7 remote-as 1100

R7

router bgp 1100

neighbor 10.0.37.3 remote-as 1100

neighbor 10.0.57.5 remote-as 1100

neighbor 10.0.67.6 remote-as 1100

R8

router bgp 300

bgp confederation identifier 300

bgp confederation peers 600

neighbor 10.0.80.10 remote-as 600

neighbor 10.0.89.9 remote-as 300

R9

router bgp 300

neighbor 10.0.89.8 remote-as 300

R10

router bgp 600

bgp confederation identifier 300

bgp confederation peers 300

neighbor 10.0.80.8 remote-as 300

neighbor 10.0.110.11 remote-as 300

R11

router bgp 300

bgp confederation identifier 300

bgp confederation peers 600 700

neighbor 10.0.110.10 remote-as 600

neighbor 10.0.112.12 remote-as 700

LAB 11: BGP

R12

router bgp 700

bgp confederation identifier 300

bgp confederation peers 300

neighbor 10.0.112.11 remote-as 300

R13

router bgp 60

neighbor 10.0.134.14 remote-as 60

R14

router bgp 60

neighbor 10.0.134.13 remote-as 60

Task 4: Make sure Loopback 3 and loopback 4 introduce in BGP network.

R3

router bgp 1100

network 3.3.3.0 mask 255.255.255.0

network 3.3.4.0 mask 255.255.255.0

R4

router bgp 1100

network 4.4.3.0 mask 255.255.255.0

network 4.4.4.0 mask 255.255.255.0

R5

router bgp 1100

network 5.5.3.0 mask 255.255.255.0

network 5.5.4.0 mask 255.255.255.0

R6

router bgp 1100

network 6.6.3.0 mask 255.255.255.0

network 6.6.4.0 mask 255.255.255.0

LAB 11: BGP

R7

router bgp 1100

network 7.7.3.0 mask 255.255.255.0

network 7.7.4.0 mask 255.255.255.0

R8

router bgp 300

network 8.8.3.0 mask 255.255.255.0

network 8.8.4.0 mask 255.255.255.0

R9

router bgp 300

network 9.9.3.0 mask 255.255.255.0

network 9.9.4.0 mask 255.255.255.0

R10

router bgp 600

network 10.10.3.0 mask 255.255.255.0

network 10.10.4.0 mask 255.255.255.0

R11

router bgp 300

network 11.11.3.0 mask 255.255.255.0

network 11.11.4.0 mask 255.255.255.0

R12

router bgp 700

network 12.12.3.0 mask 255.255.255.0

network 12.12.4.0 mask 255.255.255.0

R13

router bgp 60

network 13.13.3.0 mask 255.255.255.0

network 13.13.4.0 mask 255.255.255.0

LAB 11: BGP

R14

router bgp 60

network 14.14.3.0 mask 255.255.255.0

network 14.14.4.0 mask 255.255.255.0

Task 5: R3 to R7 receives all the loopback network information in bgp table. (verify after

completion of this task).

R4

router bgp 1100

neighbor 10.0.34.3 route-reflector-client

neighbor 10.0.45.5 route-reflector-client

neighbor 10.0.46.6 route-reflector-client

R6

router bgp 1100

neighbor 10.0.67.7 route-reflector-client

Task 6: Task 6 also complete in Task 3.

Task 7: Make sure R1 and R2 advertise all the loopbacks in BGP.

R1

router bgp 100

network 1.1.1.0 mask 255.255.255.0

network 1.1.2.0 mask 255.255.255.0

network 1.1.3.0 mask 255.255.255.0

network 1.1.4.0 mask 255.255.255.0

R2

router bgp 200

network 2.2.1.0 mask 255.255.255.0

network 2.2.2.0 mask 255.255.255.0

network 2.2.3.0 mask 255.255.255.0

network 2.2.4.0 mask 255.255.255.0

LAB 11: BGP

Task 8: Configure EBGP Neighborship as per given in topology. Make sure EBGP neighborship is

configure using loopback 1 only.

R1

ip route 2.2.1.0 255.255.255.0 10.0.12.2

ip route 3.3.1.0 255.255.255.0 10.0.13.3

router bgp 100

neighbor 2.2.1.1 remote-as 200

neighbor 2.2.1.1 ebgp-multihop 2

neighbor 2.2.1.1 update-source Loopback1

neighbor 3.3.1.1 remote-as 1100

neighbor 3.3.1.1 ebgp-multihop 2

neighbor 3.3.1.1 update-source Loopback1

neighbor 10.0.12.2 remote-as 200

neighbor 10.0.13.3 remote-as 1100

R2

ip route 1.1.1.0 255.255.255.0 10.0.12.1

ip route 8.8.1.0 255.255.255.0 10.0.28.8

ip route 14.14.1.0 255.255.255.0 10.0.124.14

router bgp 200

neighbor 1.1.1.1 remote-as 100

neighbor 1.1.1.1 ebgp-multihop 2

neighbor 1.1.1.1 update-source Loopback1

neighbor 8.8.1.1 remote-as 300

neighbor 8.8.1.1 ebgp-multihop 2

neighbor 8.8.1.1 update-source Loopback1

neighbor 10.0.12.1 remote-as 100

neighbor 10.0.28.8 remote-as 300

neighbor 10.0.124.14 remote-as 60

neighbor 14.14.1.1 remote-as 60

neighbor 14.14.1.1 ebgp-multihop 2

neighbor 14.14.1.1 update-source Loopback1

LAB 11: BGP

R3

router bgp 1100

neighbor 1.1.1.1 remote-as 100

neighbor 1.1.1.1 ebgp-multihop 2

neighbor 1.1.1.1 update-source Loopback1

neighbor 10.0.13.1 remote-as 100

R5

router bgp 1100

neighbor 10.0.53.13 remote-as 60

neighbor 13.13.1.1 remote-as 60

neighbor 13.13.1.1 ebgp-multihop 2

neighbor 13.13.1.1 update-source Loopback1

R7

router bgp 1100

neighbor 8.8.1.1 remote-as 300

neighbor 8.8.1.1 ebgp-multihop 2

neighbor 8.8.1.1 update-source Loopback1

neighbor 10.0.78.8 remote-as 300

R8

router bgp 300

neighbor 2.2.1.1 remote-as 200

neighbor 2.2.1.1 ebgp-multihop 2

neighbor 2.2.1.1 update-source Loopback1

neighbor 7.7.1.1 remote-as 1100

neighbor 7.7.1.1 ebgp-multihop 2

neighbor 7.7.1.1 update-source Loopback1

neighbor 10.0.28.2 remote-as 200

neighbor 10.0.78.7 remote-as 1100

R11

router bgp 300

neighbor 10.0.114.14 remote-as 60

neighbor 14.14.1.1 remote-as 60

neighbor 14.14.1.1 ebgp-multihop 2

neighbor 14.14.1.1 update-source Loopback1

LAB 11: BGP

R13

router bgp 60

neighbor 5.5.1.1 remote-as 1100

neighbor 5.5.1.1 ebgp-multihop 2

neighbor 5.5.1.1 update-source Loopback1

neighbor 10.0.53.5 remote-as 1100

R14

router bgp 60

neighbor 2.2.1.1 remote-as 200

neighbor 2.2.1.1 ebgp-multihop 2

neighbor 2.2.1.1 update-source Loopback1

neighbor 10.0.114.11 remote-as 300

neighbor 10.0.124.2 remote-as 200

neighbor 11.11.1.1 remote-as 300

neighbor 11.11.1.1 ebgp-multihop 2

neighbor 11.11.1.1 update-source Loopback1

Task 9: Make sure all routers ping loopback addresses. (Do possible Configuration)

R3

router bgp 1100

neighbor 10.0.34.4 next-hop-self

neighbor 10.0.37.7 next-hop-self

R5

router bgp 1100

neighbor 10.0.45.4 next-hop-self

neighbor 10.0.56.6 next-hop-self

neighbor 10.0.57.7 next-hop-self

R8

router bgp 300

neighbor 10.0.80.10 next-hop-self

neighbor 10.0.89.9 next-hop-self

LAB 11: BGP

R11

router bgp 300

neighbor 10.0.110.10 next-hop-self

neighbor 10.0.112.12 next-hop-self

R13

router bgp 60

neighbor 10.0.134.14 next-hop-self

R14

router bgp 60

neighbor 10.0.134.13 next-hop-self

(Note: verify using ping command with source address like:

) R3# ping 1.1.1.1 source l3

Task 10: On R2, Configure R14 as a best path for Network 3.3.3.0 and R8 as a best path for

Network 3.3.4.0.

R2

access-list 10 permit 3.3.3.0 0.0.0.255

access-list 20 permit 3.3.4.0 0.0.0.255

route-map Local permit 10

match ip address 10

set local-preference 500

exit

route-map Local permit 20

exit

route-map R8 permit 21

match ip address 20

set local-preference 600

exit

route-map R8 permit 30

exit

LAB 11: BGP

router bgp 200

neighbor 14.14.1.1 route-map Local in

neighbor 8.8.1.1 route-map R8 in

Task 11: Configure weight as 1440 on R8 to make R7 as a best path for BGP routes.

R8

router bgp 300

neighbor 10.0.78.7 weight 1440

Task 12: Make sure R7 Receives metric 10000 for Network 2.2.1.0 from R3.

R7

access-list 10 permit 2.2.1.0 0.0.0.255

route-map Filter permit 10

match ip address 10

set metric 10000

exit

route-map Filter permit 20

exit

router bgp 1100

neighbor 10.0.37.3 route-map Filter in