Jaringan Komputer
* Terdiri dari sekelompok komputer
* Saling berhubungan
* Media komunikasi : 1. Media Guide, 2. Media Unguide
1. Guide Media (cable)
A. Tembaga (copper) ~ Melalui arus listrik
i. Coxral : Thick dan Thin
ii. Twisted Pair : UTP (unshielded) dan STP (shielded)
B. Kaca (fibre) ~ Melalui cahaya (led & laser)
i. Single Core
ii. Multi Core
* Twisted Pair : Kabel dililit melingkar satu sama lain, karena kalau lurus dapat menimbulkan medan magnet sehingga data tidak dapat terkirim.
Open System Interconnection (OSI)
* Arsitektur Jaringan (OSI Layer)
* MAC (Medium Access Control)
Switch
* Unmanaged Switch
- Switch yang memiliki karakteristik layer 2
- Tidak perlu dikelola / tinggal pake
* Managed Switch
- Switch yang memiliki karakteristik layer 2
- Bisa dikelola, bisa di program / configure lebih lanjut
* Arti-Arti dalam spesifikasi switch
- CDP : Cisco Discovery Protocol
- 100baseT : 100 adalah kecepatannya, base adalah Band nya, T adalah Twisted Pair
- Autonegotiate : Terdiri dari Simplex, Implex, Duplex
- Spanning Tree : Enabled
i. Untuk menangani data loop di jaringan
ii. Untuk menanggulangi broadcast yang berlebihan
iii. Untuk menstabilkan MAC Address Table
- Console password : dapat di beri password
* Cara Konfigurasi
- Masuk ke dalam promt config # ~> (config)#
Contoh : tipe 1900
- wg_sw_1900(config)#ip address {ip_address} {mask}
Contoh : tipe 2950
- wg_sw_2950(config-if)#ip address {ip_address} {mask}
- sebelum nya harus masuk (config)#interface vlan1
* Gateway Config
- wg_sw_a(config)#ip default-gateway {ip_address}
beberapa command : #show ip, #show interface, #show mac-address-table
Duplex Overview
* Half Duplex (CSMA/CD)
- Unidirectional data flow
- Higher potential for collision
- Hubs connectivity
* Full Duplex
- Point to point only
- Attached to dedicated switch port
- Require, full duplex support on both end
- Collision free
- Collision detect circuit disabled
* Setting duplex option
- 1900
wg_sw_1900(config)#interface e0/1
wg_sw_1900(config-if)#duplex {auto | full | full-flow-control | half}
- 2950
wg_sw_2950(config)#interface fe0/1
wg_sw_2950(config-if)#duplex {auto | full | half}
~ e : ethernet (10mb/s)
fe : fastethernet (100mb/s)
* Port Security
- 1900
#port secure [max-mac-count count]
- 2950
#port security max-mac-count count
Add, Change, Moving MAC Address
* Adding MAC Address
1. Configure port security
2. Configure the MAC address
* Changing the MAC Address
1. Remove MAC address restrictions
* Moving a MAC Address
1. Add the address to a new port
2. Configure port security on new switch
3. Configure the MAC address to the port allocated for the new user
4. Remove the old port configure
Ethernet Switches and Bridges
* Address Learning
* Forward / filter decision
* Loop avoidance
* Transmitting Frames
- Cut-Through : Check destination address
- Fragment-Free : Check the first 64 bytes, then begin forwarding frame
- Store and Forward : Complete frame received and checked before forwarding
* Perangkat yang support vlan :
- 802.1Q trunking
Switch seri 3xxx+ sudah bisa routing
* Configure 802.1Q Trunking
- #switch port mode trunk
* Adding a VLAN
- 1900 ==> #vlan vlan# [name vlan-name]
- 2950 ==>#vlan database
==> #vlan vlan# [name dan vlan-rame]