Cisco Switch sebagai DHCP Server

Ni Switch & PC baru, dalam ni belum configure apa2 pun lagi.

Switch tu kita akan jadikan DHCP Server.

PC tu jadi DHCP client. Jadi PC tu tak payah usik apa2. Sebab tu lah IP dia 0.0.0.0 .

.

Packet Tracer PC Command Line 1.0

C:\>ipconfig

FastEthernet0 Connection:(default port)

Connection-specific DNS Suffix..:

IPv4 Address....................: 0.0.0.0

Subnet Mask.....................: 0.0.0.0

Default Gateway.................: ::

0.0.0.0 

1st step kenalah set IP dulu dalam Switch. IP tu kena set dalam VLAN.

By default cuma ada VLAN 1 je, tapi tak digalakkan guna Default VLAN ni sebagai Management VLAN.

Jadi kita buat VLAN baru, katakan VLAN 90 untuk Management VLAN

1. Create VLAN 90 untuk Management

Switch#conf t

Enter configuration commands, one per line. End with CNTL/Z.

Switch(config)#vlan 90

Switch(config-vlan)#name Management

Switch(config-vlan)#exit

Switch(config)#

Guna command show vlan brief perhatikan VLAN 90 dah pun ada kat situ

Status active

Tapi Port takde lagi.

Switch#show vlan brief

VLAN Name Status Ports

---- -------------------------------- --------- -------------------------------

1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4

Fa0/5, Fa0/6, Fa0/7, Fa0/8

Fa0/9, Fa0/10, Fa0/11, Fa0/12

Fa0/13, Fa0/14, Fa0/15, Fa0/16

Fa0/17, Fa0/18, Fa0/19, Fa0/20

Fa0/21, Fa0/22, Fa0/23, Fa0/24

Gig0/1, Gig0/2

90 Management active

Jadi kenala assign port dekat VLAN 90 tu

Switch(config)#int Fa0/1

Switch(config-if)#switchport mode access

Switch(config-if)#switchport access vlan 90

Switch(config-if)#e

Dalam global config mode takleh run command show macam biasa. Kalau run jugak kuar error macam ni.

Switch(config)#show vlan brief

^

% Invalid input detected at '^' marker.

Switch(config)#

Tapi boleh je kalau nak run pun, letak do je kat depan tu.

Switch(config)#do show vlan brief

VLAN Name Status Ports

---- -------------------------------- --------- -------------------------------

1 default active Fa0/2, Fa0/3, Fa0/4, Fa0/5

Fa0/6, Fa0/7, Fa0/8, Fa0/9

Fa0/10, Fa0/11, Fa0/12, Fa0/13

Fa0/14, Fa0/15, Fa0/16, Fa0/17

Fa0/18, Fa0/19, Fa0/20, Fa0/21

Fa0/22, Fa0/23, Fa0/24, Gig0/1

Gig0/2

90 Management active Fa0/1

OK sekarang ni port Fa0/1 dah pun kita assign pada VLAN 90 (Management).

Tapi IP belum lagi kita set dekat VLAN 90 ni.

Switch#show ip interface brief

Interface IP-Address OK? Method Status Protocol

FastEthernet0/1 unassigned YES manual up up

FastEthernet0/2 unassigned YES manual down down

FastEthernet0/3 unassigned YES manual down down

...

FastEthernet0/24 unassigned YES manual down down

GigabitEthernet0/1 unassigned YES manual down down

GigabitEthernet0/2 unassigned YES manual down down

Vlan1 unassigned YES manual administratively down down

Vlan90 unassigned YES manual up up

Switch#

Nak set IP dekat VLAN senang je

Switch#conf t

Enter configuration commands, one per line. End with CNTL/Z.

Switch(config)#interface vlan 90

Switch(config-if)#ip address 10.1.1.1 255.255.255.0

Switch(config-if)#e

Switch(config)#

Cek lagi sekali. Nampak tak IP dah ada, Status & Protocol pun up

Switch(config)#do show ip interface brief

Interface IP-Address OK? Method Status Protocol

FastEthernet0/1 unassigned YES manual up up

...

GigabitEthernet0/2 unassigned YES manual down down

Vlan1 unassigned YES manual administratively down down

Vlan90 10.1.1.1 YES manual up up

Switch(config)#

Ok sekarang set DHCP server pulak dekat Switch. 2 line ni je cukup

Switch#conf t

Enter configuration commands, one per line. End with CNTL/Z.

Switch(config)#ip dhcp pool CUBAAN

Switch(dhcp-config)#network 10.1.1.0 255.255.255.0

Kalau tengok dekat show running-config atau sh run , ni lah config semasa DHCP

!

ip dhcp pool CUBAAN

network 10.1.1.0 255.255.255.0

!

Pergi kat PC, try renew IP, maka dapatlah IP & subnet mask.

Kalau DHCP request failed , cuba lagi macam kat bawah ni.

Gateway & DNS 0.0.0.0 sebab kita tak set tadi

C:\>ipconfig /renew

IP Address......................: 10.1.1.2

Subnet Mask.....................: 255.255.255.0

Default Gateway.................: 0.0.0.0

DNS Server......................: 0.0.0.0

Kalau nak guna Gateway atau DNS Server tambah je 2 command ni dalam dhcp-config tadi.

Switch(dhcp-config)#default-router 10.1.1.1

Switch(dhcp-config)#dns-server 10.1.1.1

Switch(dhcp-config)#

Try, renew balik IP

C:\>ipconfig /renew

IP Address......................: 10.1.1.2

Subnet Mask.....................: 255.255.255.0

Default Gateway.................: 10.1.1.1

DNS Server......................: 10.1.1.1

C:\>

Kali ni Gateway atau DNS Server dah pun ada.