Task
Configure BGP AS 8.10 on R8 & R10.
Configure BGP AS 100 on R1, R2, R3, R4, R5, and R6.
Configure BGP AS 200 on R7 and R9.
R8 & R10 should peer iBGP.
R7 & R9 should peer iBGP.
R5 should peer iBGP with all routers in AS 100; use OSPF as the IGP for AS 100.
AS 100 should peer EBGP with AS 200 and 8.10.
Advertise the Host5, Host7, Host8, Host9, and Host10 segments into BGP.
R8 should advertise a summary of the Host8 and Host10 segments to R5.
R6 should inject the subnet 155.1.8.0/24 towards R7, so that return traffic from
Host9 to Host8 is preferred that way.
R3 should inject the subnet 155.1.10.0/24 towards R7, so that return traffic from
Host9 to Host10 is preferred that way.
If R3 or R6 are down, traffic should failover to the alternate peering between AS
100 and AS 200.
Solutions
R1:
interface Tunnel0
ip ospf 1 area 0
!
interface GigabitEthernet0/1
ip ospf 1 area 0
!
interface GigabitEthernet0/2
ip ospf 1 area 0
!
interface Loopback0
ip ospf 1 area 0
!
router bgp 100
neighbor 150.1.5.5 remote-as 100
neighbor 150.1.5.5 update-source Loopback0
R2:
interface Tunnel0
ip ospf 1 area 0
!
interface GigabitEthernet0/1
ip ospf 1 area 0
!
interface Loopback0
ip ospf 1 area 0
!
router bgp 100
neighbor 150.1.5.5 remote-as 100
neighbor 150.1.5.5 update-source Loopback0
R3:
interface Tunnel0
ip ospf 1 area 0
!
interface GigabitEthernet0/1
ip ospf 1 area 0
!
interface GigabitEthernet0/2
ip ospf 1 area 0
!
interface Loopback0
ip ospf 1 area 0
!
ip prefix-list INJECT-PREFIXES permit 155.1.10.0/24
!
ip prefix-list R5 permit 150.1.5.5/32
!
ip prefix-list HOST8-HOST10-SUMMARY permit 155.1.8.0/22
!
route-map EXIST-MAP permit 10
match ip route-source prefix-list R5
match ip address prefix-list HOST8-HOST10-SUMMARY
!
route-map INJECT-MAP permit 10
set ip address prefix-list INJECT-PREFIXES
!
router bgp 100
bgp inject-map INJECT-MAP exist-map EXIST-MAP
neighbor 150.1.5.5 remote-as 100
neighbor 150.1.5.5 update-source Loopback0
neighbor 150.1.5.5 next-hop-self
neighbor 155.1.37.7 remote-as 200
R4:
interface Tunnel0
ip ospf 1 area 0
!
interface GigabitEthernet0/1
ip ospf 1 area 0
!
interface GigabitEthernet0/2
ip ospf 1 area 0
!
interface Loopback0
ip ospf 1 area 0
!
router bgp 100
neighbor 150.1.5.5 remote-as 100
neighbor 150.1.5.5 update-source Loopback0
R5:
interface Tunnel0
ip ospf network point-to-multipoint
ip ospf hello-interval 10
ip ospf 1 area 0
!
interface GigabitEthernet0/1
ip ospf 1 area 0
!
interface Loopback0
ip ospf 1 area 0
!
router bgp 100
network 155.1.5.0 mask 255.255.255.0
neighbor IBGP peer-group
neighbor IBGP remote-as 100
neighbor IBGP update-source Loopback0
neighbor IBGP route-reflector-client
neighbor IBGP next-hop-self
neighbor 150.1.1.1 peer-group IBGP
neighbor 150.1.2.2 peer-group IBGP
neighbor 150.1.3.3 peer-group IBGP
neighbor 150.1.4.4 peer-group IBGP
neighbor 150.1.6.6 peer-group IBGP
neighbor 155.1.58.8 remote-as 8.10
R6:
interface GigabitEthernet0/0
ip ospf 1 area 0
!
interface Loopback0
ip ospf 1 area 0
!
ip prefix-list INJECT-PREFIXES permit 155.1.8.0/24
!
ip prefix-list R5 permit 150.1.5.5/32
!
ip prefix-list HOST8-HOST10-SUMMARY permit 155.1.8.0/22
!
route-map EXIST-MAP permit 10
match ip route-source prefix-list R5
match ip address prefix-list HOST8-HOST10-SUMMARY
!
route-map INJECT-MAP permit 10
set ip address prefix-list INJECT-PREFIXES
!
router bgp 100
bgp inject-map INJECT-MAP exist-map EXIST-MAP
neighbor 150.1.5.5 remote-as 100
neighbor 150.1.5.5 update-source Loopback0
neighbor 150.1.5.5 next-hop-self
neighbor 155.1.67.7 remote-as 200
R7:
router bgp 200
network 155.1.7.0 mask 255.255.255.0
neighbor 155.1.79.9 remote-as 200
neighbor 155.1.79.9 next-hop-self
neighbor 155.1.37.3 remote-as 100
neighbor 155.1.67.6 remote-as 100
R8:
router bgp 8.10
aggregate-address 155.1.8.0 255.255.252.0 summary-only
network 155.1.8.0 mask 255.255.255.0
neighbor 155.1.58.5 remote-as 100
neighbor 155.1.108.10 remote-as 8.10
neighbor 155.1.108.10 next-hop-self
R9:
router bgp 200
network 155.1.9.0 mask 255.255.255.0
neighbor 155.1.79.7 remote-as 200
R10:
router bgp 8.10
network 155.1.10.0 mask 255.255.255.0
neighbor 155.1.108.8 remote-as 8.10
