1. Topologi Lab
- Gunakan pengalamatan IP standard IDN
- Gunakan EIGRP di IDN-R1,R2 dan R3 agar ip loopback 0 reachable dari ketiga router tersebut.
- Konfigurasikan iBGP peers menggunakan loopback 0, IDN-R2 sebagai RR
- Buat loopback 1 kemudian diadvertise ke BGP
- Konfigurasikan eBGP peers menggunakan ip fisik interface antara IDN-R2 dan IDN-R4
- Konfigurasikan no-export di IDN-R1, cek BGP route di IDN-R4
- Konfigurasikan no-advertise di IDN-R3, cek BGP route di IDN-R1 dan IDN-R4
IDN-R1(config-router)#router eigrp 1
IDN-R1(config-router)#net 12.12.12.1 0.0.0.0
IDN-R1(config-router)#net 1.1.1.1 0.0.0.0
IDN-R1(config-router)#router bgp 123
IDN-R1(config-router)#nei 2.2.2.2 remote-as 123
IDN-R1(config-router)#nei 2.2.2.2 up l0
IDN-R1(config-router)#int lo1
IDN-R1(config-if)#ip add 11.11.11.11 255.255.255.255
IDN-R1(config-if)#router bgp 123
IDN-R1(config-router)#net 11.11.11.11 mask 255.255.255.255
IDN-R2(config)#router eigrp 1
IDN-R2(config-router)#net 12.12.12.2 0.0.0.0
*Mar 1 00:04:20.231: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 12.12.12.1 (FastEthernet0/0) is up: new adjacency
IDN-R2(config-router)#net 23.23.23.2 0.0.0.0
IDN-R2(config-router)#net 2.2.2.2 0.0.0.0
IDN-R2(config-router)#ex
IDN-R2(config)#router bgp 123
IDN-R2(config-router)#nei 1.1.1.1 remote-as 123
IDN-R2(config-router)#nei 1.1.1.1 route-r
IDN-R2(config-router)#nei 1.1.1.1 up l0
IDN-R2(config-router)#nei 1.1.1.1 next-hop-self
IDN-R2(config-router)#nei 3.3.3.3 remote-as 123
*Mar 1 00:08:34.471: %BGP-5-ADJCHANGE: neighbor 1.1.1.1 Up
IDN-R2(config-router)#nei 3.3.3.3 route-r
IDN-R2(config-router)#nei 3.3.3.3 up l0
IDN-R2(config-router)#nei 3.3.3.3 next-hop-self
*Mar 1 00:08:51.571: %BGP-5-ADJCHANGE: neighbor 3.3.3.3 Up
IDN-R2(config-router)#nei 24.24.24.4 remote-as 4
*Mar 1 00:10:14.435: %BGP-5-ADJCHANGE: neighbor 24.24.24.4 Up
IDN-R2(config-router)#int l01
IDN-R2(config-if)#ip add 22.22.22.22 255.255.255.255
IDN-R2(config-if)#router bgp 123
IDN-R2(config-router)#net 22.22.22.22 mask 255.255.255.255
IDN-R3(config)#router eigrp 1
IDN-R3(config-router)#net 23.23.23.3 0.0.0.0
*Mar 1 00:04:59.699: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 23.23.23.2 (FastEthernet0/0) is up: new adjacency
IDN-R3(config-router)#net 3.3.3.3 0.0.0.0
IDN-R3(config-router)#ex
IDN-R3(config)#router bgp 123
IDN-R3(config-router)#nei 2.2.2.2 remote-as 123
IDN-R3(config-router)#nei 2.2.2.2 up l0
*Mar 1 00:09:00.703: %BGP-5-ADJCHANGE: neighbor 2.2.2.2 Up
IDN-R3(config-router)#int lo1
IDN-R3(config-if)#ip add 33.33.33.33 255.255.255.255
IDN-R3(config-if)#router bgp 123
IDN-R3(config-router)#net 33.33.33.33 mask 255.255.255.255
IDN-R4(config-if)#router bgp 4
IDN-R4(config-router)#nei 24.24.24.2 remote-as 123
*Mar 1 00:10:11.947: %BGP-5-ADJCHANGE: neighbor 24.24.24.2 Up
IDN-R4(config-router)#net 4.4.4.4 mask 255.255.255.255
Cek BGP router di IDN-R1 dan IDN-R4
IDN-R1(config-router)#do sh ip bgp
BGP table version is 5, local router ID is 1.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*>i4.4.4.4/32 2.2.2.2 0 100 0 4 i
*> 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 i
IDN-R4(config-router)#do sh ip bgp
BGP table version is 5, local router ID is 4.4.4.4
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 4.4.4.4/32 0.0.0.0 0 32768 i
*> 11.11.11.11/32 24.24.24.2 0 123 i
*> 22.22.22.22/32 24.24.24.2 0 0 123 i
*> 33.33.33.33/32 24.24.24.2 0 123 i
Set Community "no-export" di IDN-R1 (no-export : tidak diadvertise ke eBGP)
IDN-R1(config)#access-list 1 permit host 11.11.11.11
IDN-R1(config)#route-map NO-EXPORT
IDN-R1(config-route-map)#match ip address 1
IDN-R1(config-route-map)#set community no-export
IDN-R1(config-route-map)#router bgp 123
IDN-R1(config-router)#nei 2.2.2.2 route-map NO-EXPORT out
IDN-R1(config-router)#nei 2.2.2.2 send-community
Kita reset dulu BGP di semua router, dan runggu beberapa saat
IDN-R1 - R4(config-router)#do clear ip bgp *
Sekarang kita cek ip bgp di IDN-R4, pastikan network 11.11.11.11 sudah tidak ada
IDN-R4(config-router)#do sh ip bgp
BGP table version is 8, local router ID is 4.4.4.4
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 4.4.4.4/32 0.0.0.0 0 32768 i
*> 22.22.22.22/32 24.24.24.2 0 0 123 i
*> 33.33.33.33/32 24.24.24.2 0 123 i
Sedangkan di IDN-R3 masih ada karena dia menggunakan iBGP untuk peering ke IDN-R1
IDN-R3(config-router)#do sh ip bgp
BGP table version is 11, local router ID is 33.33.33.33
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*>i4.4.4.4/32 2.2.2.2 0 100 0 4 i
*>i11.11.11.11/32 1.1.1.1 0 100 0 i
*>i22.22.22.22/32 2.2.2.2 0 100 0 i
*> 33.33.33.33/32 0.0.0.0 0 32768 i
IDN-R2(config-router)#do sh ip bgp 11.11.11.11
BGP routing table entry for 11.11.11.11/32, version 3
Paths: (1 available, best #1, table Default-IP-Routing-Table, not advertised to EBGP peer)
Advertised to update-groups:
3
Local, (Received from a RR-client)
1.1.1.1 (metric 409600) from 1.1.1.1 (11.11.11.11)
Origin IGP, metric 0, localpref 100, valid, internal, best
Community: no-export
Set community "no-advertise" di R3 (no-advertise : tidak diadvertise ke iBGP/eBGP)
IDN-R3(config)#access-list 1 permit host 33.33.33.33
IDN-R3(config)#route-map NO-ADVERTISE
IDN-R3(config-route-map)#match ip address 1
IDN-R3(config-route-map)#set community no-advertise
IDN-R3(config-route-map)#router bgp 123
IDN-R3(config-router)#nei 2.2.2.2 route-map NO-ADVERTISE out
IDN-R3(config-router)#nei 2.2.2.2 send-community
Kita reset dulu BGP di semua router, dan runggu beberapa saat
IDN-R1 - R4(config-router)#do clear ip bgp *
Kita cek di IDN-R1 dan IDN-R4
IDN-R1(config-router)#do sh ip bgp
BGP table version is 6, local router ID is 11.11.11.11
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*>i4.4.4.4/32 2.2.2.2 0 100 0 4 i
*> 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
IDN-R4(config-router)#do sh ip bgp
BGP table version is 9, local router ID is 4.4.4.4
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 4.4.4.4/32 0.0.0.0 0 32768 i
*> 22.22.22.22/32 24.24.24.2 0 0 123 i
Look, network 33.33.33.33 sudah tidak ada. Cek ri IDN-R2
IDN-R2(config-router)#do sh ip bgp 33.33.33.33
BGP routing table entry for 33.33.33.33/32, version 6
Paths: (1 available, best #1, table Default-IP-Routing-Table, not advertised to any peer)
Not advertised to any peer
Local, (Received from a RR-client)
3.3.3.3 (metric 409600) from 3.3.3.3 (33.33.33.33)
Origin IGP, metric 0, localpref 100, valid, internal, best
Community: no-advertise
Sipp dah.. kurang lebih gitu deh tentang atribut community di BGP.
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