Berhubung gue lagi males bikin tulisan dalam bahasa inggris, kali ini gue buat dalam bahasa indonesia aja lah, dengan gaya bahasa yang tidak terlalu formal tentunya agar mudah "dicerna" dan tidak kaku. To the point aja, setelah baca tutorial, ebook dan googling sana-sini, gue mau bikin sedikit ringkasan mengenai cloud Frame Relay. Pada umumnya, ketika customer menghubungkan router-router yang ada di kantor cabang dan pusat melalui cloud Frame Relay milik ISP. Mereka tidak tahu apa yang ada di dalam cloud tersebut, cloud Frame Relay akan nampak transparan dari sisi mereka. Kira-kira seperti inilah topologi Frame Relay yang nampak dari sisi customer.
Setelah melihat topologi logic di atas, mari kita lihat topologi fisik-nya seperti gambar di bawah ini:
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| Topologi Logic Frame Relay Cloud |
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| Topologi Fisik Frame Relay Cloud |
FR1:
!
hostname FR1
!
frame-relay switching
!
interface Serial1/0
description to R1
no ip address
encapsulation frame-relay
serial restart-delay 0
frame-relay intf-type dce
frame-relay route 102 interface Serial1/1 112
frame-relay route 103 interface Serial1/1 113
!
interface Serial1/1
description to FR2
no ip address
encapsulation frame-relay
serial restart-delay 0
frame-relay intf-type nni
frame-relay route 112 interface Serial1/0 102
frame-relay route 113 interface Serial1/0 103
!
FR2:
!
hostname FR2
!
frame-relay switching
!
interface Tunnel0
ip unnumbered FastEthernet0/0
tunnel source FastEthernet0/0
tunnel destination 10.1.2.1
!
interface FastEthernet0/0
ip address 10.1.1.1 255.255.255.252
duplex auto
speed auto
!
interface Serial1/0
description to R2
no ip address
encapsulation frame-relay
serial restart-delay 0
frame-relay intf-type dce
frame-relay route 201 interface Serial1/1 112
frame-relay route 203 interface Tunnel0 223
!
interface Serial1/1
description to FR1
no ip address
encapsulation frame-relay
serial restart-delay 0
frame-relay intf-type nni
frame-relay route 112 interface Serial1/0 201
frame-relay route 113 interface Tunnel0 443
!
router ospf 1
log-adjacency-changes
redistribute connected subnets
network 10.1.1.0 0.0.0.3 area 0
!
FR3:
!
hostname FR3
!
interface FastEthernet0/0
ip address 10.1.1.2 255.255.255.252
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 10.1.2.2 255.255.255.252
duplex auto
speed auto
!
router ospf 1
log-adjacency-changes
network 10.1.1.0 0.0.0.3 area 0
network 10.1.2.0 0.0.0.3 area 0
!
FR4:
!
hostname FR4
!
frame-relay switching
!
interface Tunnel0
ip unnumbered FastEthernet0/0
tunnel source FastEthernet0/0
tunnel destination 10.1.1.1
!
interface FastEthernet0/0
ip address 10.1.2.1 255.255.255.252
duplex auto
speed auto
!
interface Serial1/0
description to R3
no ip address
encapsulation frame-relay
serial restart-delay 0
frame-relay intf-type dce
frame-relay route 301 interface Tunnel0 443
frame-relay route 302 interface Tunnel0 223
!
router ospf 1
log-adjacency-changes
network 10.1.2.0 0.0.0.3 area 0
!
Pada switch FR1-FR2, kita gunakan signaling interface NNI(Network-to-Network Interface) untuk menghubungkan dua switch Frame Relay. Antara switch FR2-FR3-FR4, kita jalankan routing OSPF sederhana agar tunneling dari FR2-FR4 bisa jalan dengan baik.
R1:
!
hostname R1
!
interface Serial1/0
no ip address
encapsulation frame-relay
serial restart-delay 0
!
interface Serial1/0.102 point-to-point
ip address 12.12.12.1 255.255.255.252
frame-relay interface-dlci 102
!
interface Serial1/0.103 point-to-point
ip address 13.13.13.1 255.255.255.252
frame-relay interface-dlci 103
!
R2:
!
hostname R2
!
interface Serial1/0
no ip address
encapsulation frame-relay
serial restart-delay 0
!
interface Serial1/0.201 point-to-point
ip address 12.12.12.2 255.255.255.252
frame-relay interface-dlci 201
!
interface Serial1/0.203 point-to-point
ip address 23.23.23.2 255.255.255.0
frame-relay interface-dlci 203
!
R3:
!
hostname R3
!
!
interface Serial1/0
no ip address
encapsulation frame-relay
serial restart-delay 0
!
interface Serial1/0.301 point-to-point
ip address 13.13.13.2 255.255.255.252
frame-relay interface-dlci 301
!
interface Serial1/0.302 point-to-point
ip address 23.23.23.3 255.255.255.0
frame-relay interface-dlci 302
!
Verifikasi konfigurasi
FR1#show frame-relay route
Input Intf Input Dlci Output Intf Output Dlci Status
Serial1/0 102 Serial1/1 112 active
Serial1/0 103 Serial1/1 113 active
Serial1/1 112 Serial1/0 102 active
Serial1/1 113 Serial1/0 103 active
FR2#show frame-relay route
Input Intf Input Dlci Output Intf Output Dlci Status
Serial1/0 201 Serial1/1 112 active
Serial1/0 203 Tunnel0 223 active
Serial1/1 112 Serial1/0 201 active
Serial1/1 113 Tunnel0 443 active
Tunnel0 223 Serial1/0 203 active
Tunnel0 443 Serial1/1 113 active
FR4#show frame-relay route
Input Intf Input Dlci Output Intf Output Dlci Status
Serial1/0 301 Tunnel0 443 active
Serial1/0 302 Tunnel0 223 active
Tunnel0 223 Serial1/0 302 active
Tunnel0 443 Serial1/0 301 active
R1:
R1#show frame-relay map
Serial1/0.103 (up): point-to-point dlci, dlci 103(0x67,0x1870), broadcast
status defined, active
Serial1/0.102 (up): point-to-point dlci, dlci 102(0x66,0x1860), broadcast
status defined, active
R1#ping 12.12.12.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 12.12.12.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/27/36 ms
R1#ping 13.13.13.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 13.13.13.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 24/32/40 ms
R2:
R2#show frame-relay map
Serial1/0.203 (up): point-to-point dlci, dlci 203(0xCB,0x30B0), broadcast
status defined, active
Serial1/0.201 (up): point-to-point dlci, dlci 201(0xC9,0x3090), broadcast
status defined, active
R2#ping 12.12.12.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 12.12.12.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/30/52 ms
R2#ping 23.23.23.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 23.23.23.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/122/476 ms
R3:
R3#show frame-relay map
Serial1/0.301 (up): point-to-point dlci, dlci 301(0x12D,0x48D0), broadcast
status defined, active
Serial1/0.302 (up): point-to-point dlci, dlci 302(0x12E,0x48E0), broadcast
status defined, active
R3#ping 13.13.13.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 13.13.13.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/44/60 ms
R3#ping 23.23.23.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 23.23.23.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/55/128 ms
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