Redistribution

Redistribusi dalam networking ada beberapa jenis baik itu redistribusi ospf ke rip atau sebaliknya maupun redistribusi yang lain.

Untuk 1 titik redistribusi dalam sebuah cloud network tidak akan mengandung resiko, tetapi apabila 2 titik atau lebih akan sangat riskan terhadap network kita, oleh karena itu dalam pengaturan redistribusi harus benar-benar berhati-hati agar tidak terjadi risk yang tinggi dalam network kita seperti loop.

Untuk lab redistribusi ini sy akan membahas yang satu titik saja terlebih dahulu yaitu mutual redistribution, bagaimana konfigurasi dan penerapannya di lab dengan menggunakan gns :

• Mutual Redistribution

 

 

 

 

 

R1:
!
interface Loopback0
ip address 1.1.1.1 255.255.255.255
!
interface FastEthernet0/0
ip address 12.12.12.1 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 13.13.13.1 255.255.255.0
duplex auto
speed auto
!
router eigrp 1
network 1.1.1.1 0.0.0.0
network 12.12.12.1 0.0.0.0
network 13.13.13.1 0.0.0.0
no auto-summary
!

R2:
interface Loopback0
ip address 2.2.2.2 255.255.255.255
!
interface FastEthernet0/0
ip address 12.12.12.2 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 24.24.24.2 255.255.255.0
duplex auto
speed auto
!
router eigrp 1
network 2.2.2.2 0.0.0.0
network 12.12.12.2 0.0.0.0
network 24.24.24.2 0.0.0.0
no auto-summary
!

R3:
!
interface Loopback0
ip address 3.3.3.3 255.255.255.255
!
interface FastEthernet0/0
ip address 13.13.13.3 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 35.35.35.3 255.255.255.0
duplex auto
speed auto
!
router eigrp 1
network 3.3.3.3 0.0.0.0
network 13.13.13.3 0.0.0.0
no auto-summary
!
router ospf 1
log-adjacency-changes
network 35.35.35.3 0.0.0.0 area 0
!

R4:
!
interface Loopback0
ip address 4.4.4.4 255.255.255.255
!
interface FastEthernet0/0
ip address 24.24.24.4 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 46.46.46.4 255.255.255.0
duplex auto
speed auto
!
router eigrp 1
network 24.24.24.4 0.0.0.0
no auto-summary
!
router ospf 1
log-adjacency-changes
network 4.4.4.4 0.0.0.0 area 0
network 46.46.46.4 0.0.0.0 area 0
!

R5:
!
interface Loopback0
ip address 5.5.5.5 255.255.255.255
!
interface FastEthernet0/0
ip address 56.56.56.5 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 35.35.35.5 255.255.255.0
duplex auto
speed auto
!
router ospf 1
log-adjacency-changes
network 5.5.5.5 0.0.0.0 area 0
network 35.35.35.5 0.0.0.0 area 0
network 56.56.56.5 0.0.0.0 area 0
!

R6:
interface Loopback0
ip address 6.6.6.6 255.255.255.255
!
interface FastEthernet0/0
ip address 56.56.56.6 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 46.46.46.6 255.255.255.0
duplex auto
speed auto
!
router ospf 1
log-adjacency-changes
network 6.6.6.6 0.0.0.0 area 0
network 46.46.46.6 0.0.0.0 area 0
network 56.56.56.6 0.0.0.0 area 0
!
!

Untuk menghindari routing loop, selain dengan merubah nilai administrative distance, kita bisa juga dengan menandai atau route tagging pada setiap network yang di redistribute.

R3:
!
router eigrp 1
redistribute ospf 1 metric 1 1 1 1 1 route-map OSPF-ke-EIGRP
!
router ospf 1
log-adjacency-changes
!
route-map EIGRP-ke-OSPF deny 10
match tag 120
!
route-map EIGRP-ke-OSPF permit 20
set tag 90
!
route-map OSPF-ke-EIGRP deny 10
match tag 90
!
route-map OSPF-ke-EIGRP permit 20
set tag 120

R4:
router eigrp 1
redistribute ospf 1 metric 1 1 1 1 1 route-map OSPF-ke-EIGRP
!
router ospf 1
log-adjacency-changes
!
route-map EIGRP-ke-OSPF deny 10
match tag 120
!
route-map EIGRP-ke-OSPF permit 20
set tag 90
!
route-map OSPF-ke-EIGRP deny 10
match tag 90
!
route-map OSPF-ke-EIGRP permit 20
set tag 120

Cek routing table di R1:

R1#sh ip route 5.5.5.5
Routing entry for 5.5.5.5/32
Known via “eigrp 1″, distance 170, metric 2560051456
Tag 120, type external
Redistributing via eigrp 1
Last update from 12.12.12.2 on FastEthernet0/0, 00:00:08 ago
Routing Descriptor Blocks:
* 12.12.12.2, from 12.12.12.2, 00:00:08 ago, via FastEthernet0/0
Route metric is 2560051456, traffic share count is 1
Total delay is 2010 microseconds, minimum bandwidth is 1 Kbit
Reliability 1/255, minimum MTU 1 bytes
Loading 1/255, Hops 2
Route tag 120

R1#sh ip route 6.6.6.6
Routing entry for 6.6.6.6/32
Known via “eigrp 1″, distance 170, metric 2560025856
Tag 120, type external
Redistributing via eigrp 1
Last update from 13.13.13.3 on FastEthernet0/1, 00:00:30 ago
Routing Descriptor Blocks:
* 13.13.13.3, from 13.13.13.3, 00:00:30 ago, via FastEthernet0/1
Route metric is 2560025856, traffic share count is 1
Total delay is 1010 microseconds, minimum bandwidth is 1 Kbit
Reliability 1/255, minimum MTU 1 bytes
Loading 1/255, Hops 1
Route tag 120

R6#sh ip route 1.1.1.1
Routing entry for 1.1.1.1/32
Known via “ospf 1″, distance 110, metric 1
Tag 90, type extern 2, forward metric 10
Last update from 46.46.46.4 on FastEthernet0/1, 00:02:12 ago
Routing Descriptor Blocks:
* 46.46.46.4, from 4.4.4.4, 00:02:12 ago, via FastEthernet0/1
Route metric is 1, traffic share count is 1
Route tag 90

R6#sh ip route 2.2.2.2
Routing entry for 2.2.2.2/32
Known via “ospf 1″, distance 110, metric 1
Tag 90, type extern 2, forward metric 10
Last update from 46.46.46.4 on FastEthernet0/1, 00:02:46 ago
Routing Descriptor Blocks:
* 46.46.46.4, from 4.4.4.4, 00:02:46 ago, via FastEthernet0/1
Route metric is 1, traffic share count is 1
Route tag 90