Lab 146 - IOS XR IBGP Confederation

Pada lab sebelumnya kita telah belajar tentang IBGP Route Reflcetor pada IOS XR.. selanjutnya pada lab ini kita akan belajar tentang IBGP Confederation..

Berikut topologi yang akan kita gunakan

Pertama kita harus konfigurasi IP Address dan routing protocol IGP pada jaringan diatas.. pada lab ini kita akan menggunakan EIGRP yaaa.. jika ada yg belum bisa konfigurasi EIGRP di IOS XR bisa merujuk ke artikel berikut : Konfigurasi EIGRP di IOS XR..

Setelah konfigurasi EIGRP, hasilnya adalah sebagai berikut

RP/0/0/CPU0:IOS-XR1(config-eigrp-af-if)#do sh route eigrp
Wed Jun  7 06:47:34.279 UTC

D    2.2.2.2/32 [90/10752] via 12.12.12.2, 00:03:03, GigabitEthernet0/0/0/0
D    3.3.3.3/32 [90/15872] via 12.12.12.2, 00:01:12, GigabitEthernet0/0/0/0
D    4.4.4.4/32 [90/20992] via 12.12.12.2, 00:00:32, GigabitEthernet0/0/0/0
D    23.23.23.0/24 [90/15360] via 12.12.12.2, 00:03:03, GigabitEthernet0/0/0/0
D    34.34.34.0/24 [90/20480] via 12.12.12.2, 00:01:12, GigabitEthernet0/0/0/0

RP/0/0/CPU0:IOS-XR2(config-eigrp-af-if)#do sh route eigrp
Wed Jun  7 06:48:06.896 UTC

D    1.1.1.1/32 [90/10752] via 12.12.12.1, 00:03:17, GigabitEthernet0/0/0/0
D    3.3.3.3/32 [90/10752] via 23.23.23.3, 00:01:45, GigabitEthernet0/0/0/1
D    4.4.4.4/32 [90/15872] via 23.23.23.3, 00:01:05, GigabitEthernet0/0/0/1
D    34.34.34.0/24 [90/15360] via 23.23.23.3, 00:01:45, GigabitEthernet0/0/0/1

RP/0/0/CPU0:IOS-XR3(config-eigrp-af-if)#do sh route eigrp
Wed Jun  7 06:48:30.135 UTC

D    1.1.1.1/32 [90/15872] via 23.23.23.2, 00:01:54, GigabitEthernet0/0/0/0
D    2.2.2.2/32 [90/10752] via 23.23.23.2, 00:01:54, GigabitEthernet0/0/0/0
D    4.4.4.4/32 [90/10752] via 34.34.34.4, 00:01:29, GigabitEthernet0/0/0/1
D    12.12.12.0/24 [90/15360] via 23.23.23.2, 00:01:54, GigabitEthernet0/0/0/0

RP/0/0/CPU0:IOS-XR4(config-eigrp-af-if)#do sh route eigrp
Wed Jun  7 06:48:48.963 UTC

D    1.1.1.1/32 [90/20992] via 34.34.34.3, 00:01:29, GigabitEthernet0/0/0/0
D    2.2.2.2/32 [90/15872] via 34.34.34.3, 00:01:29, GigabitEthernet0/0/0/0
D    3.3.3.3/32 [90/10752] via 34.34.34.3, 00:01:29, GigabitEthernet0/0/0/0
D    12.12.12.0/24 [90/20480] via 34.34.34.3, 00:01:29, GigabitEthernet0/0/0/0
D    23.23.23.0/24 [90/15360] via 34.34.34.3, 00:01:29, GigabitEthernet0/0/0/0

Oke.. pastikan hasilnya sudah seperti itu ya.. pastikan juga masing-masing router sudah bisa ping ke loopback0 router lainnya.. berikut contoh ping dari IOS-XR1 ke loopback0 router lainnya

RP/0/0/CPU0:IOS-XR1(config-eigrp-af-if)#do ping ipv4 2.2.2.2
Wed Jun  7 06:51:23.093 UTC
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
RP/0/0/CPU0:IOS-XR1(config-eigrp-af-if)#do ping ipv4 3.3.3.3
Wed Jun  7 06:51:25.653 UTC
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/6/19 ms
RP/0/0/CPU0:IOS-XR1(config-eigrp-af-if)#do ping ipv4 4.4.4.4
Wed Jun  7 06:51:30.342 UTC
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/5/9 ms

Oke kalu sudah berhasil seperti diatas, selanjutnya kita akan konfigurasi IBGP dengan confederation..

Perhatikan topologi diatas, IOS-XR1 dan IOS-XR2 menggunaakn AS confederation 12 sedangkan IOS-XR3 dan IOS-XR4 menggunakan AS confederation 34..

Berikut konfigurasi pada IOS-XR1

RP/0/0/CPU0:IOS-XR1(config)#router bgp 12
RP/0/0/CPU0:IOS-XR1(config-bgp)#bgp confederation identifier 12

RP/0/0/CPU0:IOS-XR1(config-bgp)#address-family ipv4 unicast 
RP/0/0/CPU0:IOS-XR1(config-bgp-af)#network 11.11.11.11/32
RP/0/0/CPU0:IOS-XR1(config-bgp-af)#exit

RP/0/0/CPU0:IOS-XR1(config-bgp)#neighbor 2.2.2.2
RP/0/0/CPU0:IOS-XR1(config-bgp-nbr)#remote-as 12
RP/0/0/CPU0:IOS-XR1(config-bgp-nbr)#update-source lo0
RP/0/0/CPU0:IOS-XR1(config-bgp-nbr)#address-family ipv4 unicast 

RP/0/0/CPU0:IOS-XR1(config-bgp-nbr-af)#commit

Selanjutnya berikut konfigurasi pada IOS-XR2

RP/0/0/CPU0:IOS-XR2(config)#router bgp 12
RP/0/0/CPU0:IOS-XR2(config-bgp)#bgp confederation identifier 12
RP/0/0/CPU0:IOS-XR2(config-bgp)#bgp confederation peers 34

RP/0/0/CPU0:IOS-XR2(config-bgp)#address-family ipv4 unicast 
RP/0/0/CPU0:IOS-XR2(config-bgp-af)#network 22.22.22.22/32
RP/0/0/CPU0:IOS-XR2(config-bgp-af)#exit

RP/0/0/CPU0:IOS-XR2(config-bgp)#neighbor 1.1.1.1
RP/0/0/CPU0:IOS-XR2(config-bgp-nbr)#remote-as 12
RP/0/0/CPU0:IOS-XR2(config-bgp-nbr)#update-source lo0
RP/0/0/CPU0:IOS-XR2(config-bgp-nbr)#address-family ipv4 unicast 

RP/0/0/CPU0:IOS-XR2(config-bgp-nbr-af)#neighbor 3.3.3.3
RP/0/0/CPU0:IOS-XR2(config-bgp-nbr)#remote-as 34
RP/0/0/CPU0:IOS-XR2(config-bgp-nbr)#update-source lo0
RP/0/0/CPU0:IOS-XR2(config-bgp-nbr)#address-family ipv4 unicast 

RP/0/0/CPU0:IOS-XR2(config-bgp-nbr-af)#commit 

Perhatikan bahwa pada IOS-XR2 kita perlu mengkonfigurisakan ebgp-multihop saat neighbor 3.3.3.3.. ini dikarenakan IOS-XR2 menganggap IOS-XR3 seolah-olah adalah external AS.. sedangkan untuk peering EBGP nilai ttl nya adalah 1.. jadi kita harus memperbesar nilai ttl menggunakan perintah ebgp-multihop ini..

Selanjutnya berikut konfigurasi di IOS-XR3

RP/0/0/CPU0:IOS-XR3(config)#router bgp 34
RP/0/0/CPU0:IOS-XR3(config-bgp)#bgp confederation identifier 1234
RP/0/0/CPU0:IOS-XR3(config-bgp)#bgp confederation peers 12

RP/0/0/CPU0:IOS-XR3(config-bgp)#address-family ipv4 unicast 
RP/0/0/CPU0:IOS-XR3(config-bgp-af)#network 33.33.33.33/32
RP/0/0/CPU0:IOS-XR3(config-bgp-af)#exit

RP/0/0/CPU0:IOS-XR3(config-bgp)#neighbor 2.2.2.2
RP/0/0/CPU0:IOS-XR3(config-bgp-nbr)#remote-as 12
RP/0/0/CPU0:IOS-XR3(config-bgp-nbr)#update-source lo0
RP/0/0/CPU0:IOS-XR3(config-bgp-nbr)#address-family ipv4 unicast 

RP/0/0/CPU0:IOS-XR3(config-bgp-nbr-af)#neighbor 4.4.4.4
RP/0/0/CPU0:IOS-XR3(config-bgp-nbr)#remote-as 34
RP/0/0/CPU0:IOS-XR3(config-bgp-nbr)#update-source lo0
RP/0/0/CPU0:IOS-XR3(config-bgp-nbr)#address-family ipv4 unicast 

RP/0/0/CPU0:IOS-XR3(config-bgp-nbr-af)#commit

Perhatikan bahwa kita juga perlu mengkonfigurasikan ebgp-multihop pada IOS-XR3

Yang terahir, berikut konfigurasi pada IOS-XR4

RP/0/0/CPU0:IOS-XR4(config)#router bgp 34
RP/0/0/CPU0:IOS-XR4(config-bgp)#bgp confederation identifier 1234

RP/0/0/CPU0:IOS-XR4(config-bgp)#address-family ipv4 unicast 
RP/0/0/CPU0:IOS-XR4(config-bgp-af)#network 44.44.44.44/32
RP/0/0/CPU0:IOS-XR4(config-bgp-af)#exit 

RP/0/0/CPU0:IOS-XR4(config-bgp)#neighbor 3.3.3.3
RP/0/0/CPU0:IOS-XR4(config-bgp-nbr)#remote-as 34
RP/0/0/CPU0:IOS-XR4(config-bgp-nbr)#update-source lo0
RP/0/0/CPU0:IOS-XR4(config-bgp-nbr)#address-family ipv4 unicast 

RP/0/0/CPU0:IOS-XR4(config-bgp-nbr-af)#commit

Oke.. konfigurasi sudah selesai.. Untuk pengujian,, pastikan IOS-XR1 menerima network dari IOS-XR2, IOS-XR3, dan IOS-XR4

RP/0/0/CPU0:IOS-XR1(config-bgp-nbr-af)#do sh bgp 
Wed Jun  7 07:31:04.430 UTC
BGP router identifier 1.1.1.1, local AS number 12
BGP generic scan interval 60 secs
Non-stop routing is enabled
BGP table state: Active
Table ID: 0xe0000000   RD version: 6
BGP main routing table version 6
BGP NSR Initial initsync version 2 (Reached)
BGP NSR/ISSU Sync-Group versions 0/0
BGP scan interval 60 secs

Status codes: s suppressed, d damped, h history, * valid, > best
              i - internal, r RIB-failure, S stale, N Nexthop-discard
Origin codes: i - IGP, e - EGP, ? - incomplete
   Network            Next Hop            Metric LocPrf Weight Path
*> 11.11.11.11/32     0.0.0.0                  0         32768 i
*>i22.22.22.22/32     2.2.2.2                  0    100      0 i
*>i33.33.33.33/32     3.3.3.3                  0    100      0 (34) i
*>i44.44.44.44/32     4.4.4.4                  0    100      0 (34) i

Processed 4 prefixes, 4 paths

Oke sudah berhasil ya.. untuk lebih memastikan, kita coba lihat tabel routing di IOS-XR1

RP/0/0/CPU0:IOS-XR1(config-bgp-nbr-af)#do sh route bgp
Wed Jun  7 07:31:43.497 UTC

B    22.22.22.22/32 [200/0] via 2.2.2.2, 00:11:32
B    33.33.33.33/32 [200/0] via 3.3.3.3, 00:09:05
B    44.44.44.44/32 [200/0] via 4.4.4.4, 00:08:35

Oke sudah lengkap... sekarang kita coba lakukan ping yaa

RP/0/0/CPU0:IOS-XR1(config-bgp-nbr-af)#do ping 22.22.22.22 sou l1
Wed Jun  7 07:32:10.695 UTC
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 22.22.22.22, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/9 ms
RP/0/0/CPU0:IOS-XR1(config-bgp-nbr-af)#do ping 33.33.33.33 sou l1
Wed Jun  7 07:32:14.505 UTC
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 33.33.33.33, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/9 ms
RP/0/0/CPU0:IOS-XR1(config-bgp-nbr-af)#do ping 44.44.44.44 sou l1
Wed Jun  7 07:32:18.435 UTC
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 44.44.44.44, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/9 ms

Oke sudah berhasil yaaa... Sampai saat ini kita sudah selesai dan berhasil melakukan konfigurasi IBGP confederation pada IOS XR.. sampai jumpa di artikel selanjutnya yaa.... In Syaa Allah masih akan membahas seputar IOS XR..