Thursday, April 23, 2015

Setting DHCP Server in Junos

Network Simulasi DHCP Server

Kita simulasikan kembali yang sederhana, sebelum ke yang lebih complex. Design network simulasi seperti di atas. Fokus hanya pada router Juniper, PC2 dan R-Client-2. ( Sengaja menambahkan router R-Client-2, supaya tidak mengotak atik konfigurasi IP address di router R-client :) )
Kita tentukan dahulu network mana yang akan diterapkan service dhcp ini. Misalnya network 192.168.200.0/24, yang artinya melewati interface ge-0/0/2.0. Ok. Tanpa perlu banyak cincong lagi, langsung ke konfigurasi.
root> edit
root# edit system services
root# set dhcp pool 192.168.200.0/24
root# edit dhcp pool 192.168.200.0/24
root# set address-range low 192.168.200.50 high 192.168.200.99
root# set router 192.168.200.1
root# set name-server 8.8.8.8
root# set name-server 8.8.4.4
root# set default-lease-time 3600

root# show
address-range low 192.168.200.50 high 192.168.200.99;
default-lease-time 3600;
name-server {
    8.8.8.8;
    8.8.4.4;
}
router {
    192.168.200.1;
}
root# commit check
configuration check succeeds

Firewall
Tambahkan rule firewall untuk meng-allow service dhcp.
root# top
root# edit security zones security-zone loc2
root# set interfaces ge-0/0/2.0 host-inbound-traffic system-services dhcp
root# show
interfaces {
    ge-0/0/2.0 {
        host-inbound-traffic {
            system-services {
                ping;
                ssh;
                telnet;
                dhcp;
            }
        }
    }
}

root# commit check
configuration check succeeds
root# commit
commit complete


Ok. Selanjutnya di Router baru, R-Cisco-2, konfigurasi dhcp client di interface fa0/0
R-CLIENT-2#config ter
R-CLIENT-2(config)#inter fa0
R-CLIENT-2(config-if)#ip address dhcp
R-CLIENT-2(config-if)#no shut
R-CLIENT-2(config-if)#
*Mar  1 00:03:52.667: %LINK-3-UPDOWN: Interface FastEthernet0, changed state to up
*Mar  1 00:03:53.667: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0, changed state to up

Cuma gitu doank... Dan mari kita lihat IP addressnya yang didapatkannya.
R-CLIENT-2(config-if)#^Z
R-CLIENT-2#c
*Mar  1 00:04:38.199: %SYS-5-CONFIG_I: Configured from console by console
R-CLIENT-2#sh inter f0
FastEthernet0 is up, line protocol is up
  Hardware is PQUICC_FEC, address is d003.1924.0000 (bia d003.1924.0000)
  Internet address is 192.168.200.53/24
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, 100BaseTX/FX
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:49, output 00:00:07, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     2 packets input, 684 bytes
     Received 2 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog
     0 input packets with dribble condition detected
     12 packets output, 2724 bytes, 0 underruns
     0 output errors, 0 collisions, 8 interface resets

R-CLIENT-2#sh ip route
-----deleted----
C    192.168.200.0/24 is directly connected, FastEthernet0
S*   0.0.0.0/0 [254/0] via 192.168.200.1

Sedangkan dari PC2, seperti pada gambar di bawah ini.
IP DHCP from PC2

Mantapzz... Berhasil.

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