Lab 33. BGP Aggregation

Lab 33. BGP Aggregation

   23.44       Around The Word

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BGP aggregation digunakan untuk summarize route dan manipulasi route juga tentunya.. Let's go

Memakai topologi yang sama dengan post sebelumnya BGP Attribute Community, di sini kita akan buat beberapa ip loopback pada R4 dan akan disummary..


R1

interface Loopback0
ip address 1.1.1.1 255.255.255.255
ip ospf 1 area 0
!
interface Loopback1
ip address 11.11.11.11 255.255.255.255
!
interface FastEthernet0/0
ip address 12.12.12.1 255.255.255.0
ip ospf 1 area 0
!
router ospf 1
log-adjacency-changes
!
router bgp 123
network 11.11.11.11 mask 255.255.255.255
neighbor 2.2.2.2 remote-as 123
neighbor 2.2.2.2 update-source Loopback0


R2

interface Loopback0
ip address 2.2.2.2 255.255.255.255
ip ospf 1 area 0
!
interface Loopback1
ip address 22.22.22.22 255.255.255.255
!
interface FastEthernet0/0
ip address 12.12.12.2 255.255.255.0
ip ospf 1 area 0
!
interface Serial0/0
ip address 24.24.24.2 255.255.255.0
!
interface FastEthernet0/1
ip address 23.23.23.2 255.255.255.0
ip ospf 1 area 0
!
router ospf 1
log-adjacency-changes
!
router bgp 123
network 22.22.22.22 mask 255.255.255.255
neighbor 1.1.1.1 remote-as 123
neighbor 1.1.1.1 update-source Loopback0
neighbor 1.1.1.1 route-reflector-client
neighbor 1.1.1.1 next-hop-self
neighbor 3.3.3.3 remote-as 123
neighbor 3.3.3.3 update-source Loopback0
neighbor 3.3.3.3 route-reflector-client
neighbor 3.3.3.3 next-hop-self
neighbor 24.24.24.4 remote-as 4


R3

interface Loopback0
ip address 3.3.3.3 255.255.255.255
ip ospf 1 area 0
!
interface Loopback1
ip address 33.33.33.33 255.255.255.255
!
interface FastEthernet0/1
ip address 23.23.23.3 255.255.255.0
ip ospf 1 area 0
!
router ospf 1
log-adjacency-changes
!
router bgp 123
network 33.33.33.33
network 33.33.33.33 mask 255.255.255.255
neighbor 2.2.2.2 remote-as 123
neighbor 2.2.2.2 update-source Loopback0


R4

interface Loopback0
ip address 4.4.4.4 255.255.255.255
!
interface Loopback1
ip address 40.1.1.1 255.255.255.255
!
interface Loopback2
ip address 40.2.1.1 255.255.255.255
!
interface Loopback3
ip address 40.3.1.1 255.255.255.255
!
interface Loopback4
ip address 40.4.1.1 255.255.255.255
!
interface Loopback5
ip address 40.5.1.1 255.255.255.255
!
interface Loopback6
ip address 40.6.1.1 255.255.255.255
!
interface Serial0/0
ip address 24.24.24.4 255.255.255.0
!
router bgp 4
network 4.4.4.4 mask 255.255.255.255
network 40.1.1.1 mask 255.255.255.255
network 40.2.1.1 mask 255.255.255.255
network 40.3.1.1 mask 255.255.255.255
network 40.4.1.1 mask 255.255.255.255
network 40.5.1.1 mask 255.255.255.255
network 40.6.1.1 mask 255.255.255.255
neighbor 24.24.24.2 remote-as 123


Sekarang kita masukkan agregate address ke dalam BGP di R4

R4
router bgp 4
aggregate-address 40.0.0.0 255.248.0.0

Liat pada routing tabel R1 sudah menerima sumary dari R4 ( 40.0.0.0/13 )
Lalu kita akan summary menjadi single route pada R4 hanya menambahkan summary only setelah aggregate address..

R4
router bgp 4
aggregate-address 40.0.0.0 255.248.0.0 summary-only

Sekarang pada routing tabel R1 hanya mendapat summary saja..
Terakhir menggunakan aggreagte suppress map di R4

R4
access-list 1 permit 40.2.1.1
access-list 1 permit 40.3.1.1
access-list 1 permit 40.4.1.1
!
route-map BLOK permit 10
match ip address 1
!
router bgp 4
aggregate-address 40.0.0.0 255.248.0.0 suppress-map BLOK