FRAME RELAY INVERSE-ARP

Konfigurasi router :

R1(config)#int s0/0
R1(config-if)#ip add 12.12.12.1 255.255.255.0
R1(config-if)#encapsulation frame-relay
R1(config-if)#no shut

R2(config)#int  s0/0
R2(config-if)#encapsulation frame-relay
R2(config-if)#ip add 12.12.12.2 255.255.255.0
R2(config-if)#no shut

FRSW(config)#frame-relay switching
FRSW(config)#int s0/0
FRSW(config-if)#encapsulation frame-relay
FRSW(config-if)#frame-relay intf-type dce
FRSW(config-if)#frame-relay lmi-type cisco
FRSW(config-if)#frame-relay route 102 interface s0/1 201
FRSW(config-if)#no shut
FRSW(config-if)#int s0/1
FRSW(config-if)#encapsulation frame-relay
FRSW(config-if)#frame-relay lmi-type cisco
FRSW(config-if)#frame-relay intf-type dce
FRSW(config-if)#frame-relay route 201 interface s0/0 102

verifikasi :

R2(config-if)#do 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 = 196/318/500 ms

R1(config-if)#do 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 = 348/451/512 ms

R2#ping 255.255.255.255 repeat 1
Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 255.255.255.255, timeout is 2 seconds:
Reply to request 0 from 12.12.12.1, 192 ms

R1#ping 255.255.255.255 repeat 2
Type escape sequence to abort.
Sending 2, 100-byte ICMP Echos to 255.255.255.255, timeout is 2 seconds:
Reply to request 0 from 12.12.12.2, 96 ms
Reply to request 1 from 12.12.12.2, 224 ms

R1#sh frame-relay map
Serial0/0 (up): ip 12.12.12.2 dlci 102(0x66,0x1860), dynamic,
              broadcast,, status defined, active

R2#sh frame-relay map
Serial0/0 (up): ip 12.12.12.1 dlci 201(0xC9,0x3090), dynamic,
              broadcast,, status defined, active

seperti yang terlihat diatas bahwasaanya frame-relay inverse-ARP bekerja secara otomatis merubah encapsulasinya menjadi frame-relay. setelah interface maka router akan mengirimkan frame relay inverse-ARP reques ke semua DLCI yang didapat dari LMI interfacenya.

apabila pada frame relay switch terdapat banyak sekali DLCI yang digunakan, maka pada sisi router akan banyak DLCI yang tidak semuanya diperlukan oleh router tersebut, sehingga inverse-arp ini didisable dan kemudian dikonfigurassikan manual frame relaymapping baik secara dynamic maupun static.