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Nguyn L Hot ng Cng vi DNS, DHCP Server c xem nh nhng server chy cc dch v thit yu trong mt h thng mng. DHCP l mt dch v cung cp a ch IP ng gip cho ngi qun tr khng phi thit lp a ch IP cho tng my trong h thng mng. iu ny s gy ra s nhm ln, sai xt v kh khn trong vn thay i ca mt h thng mng. DHCP cung cp cho Client khng ch thng s IP m cn cc thng s khc ph hp vi h thng mng m client truy cp nh: IP, Subnet Mark, Default Gateway, DNS, WINS Cng vic ny khng ch nng cao vic tin cy trong h thng mng m cn gip ngi qun tr d dng hn trong vn qun l, nng cp v thay i h thng mng mt hiu qu hn. M Hnh Trin Khai

Chun b: 1 My Windows Server 2003 DHCP Server. 1 My Windows Server 2003, t tn Router (2 card mng ni vo hai mng Net1 v Net2). 1 My Windows Server 2003 DHCP Relay Agent. 1 My Windows XP Professional c tn PC01.

Yu Cu: My Windows Server 2003 dng lm DHCP Server cp a ch IP cho cc my trong hai khu

vc NET1 v NET2 vi dy a ch IP nh sau: NET1: IP :192.168.200.20 192.168.200.200 / 255.255.255.0 Default Gateway :192.168.200.254 DNS :192.168.200.1 WINS :192.168.200.1 NET2: IP :192.168.100.20 192.168.200.100 / 255.255.255.0 Default Gateway :192.168.100.254 DNS :192.168.200.1 WINS :192.168.100.1 My Windows Server 2003 dng lm DHCP Relay Agent phn pht a ch IP t DHCP Server cho cc client trong khu vc NET2. Hng dn: Phn I: Xy dng DHCP SERVER Ci t dch v DHCP Vo Add and Remove Program chn Windows Component Douple click vo Networking Service

Chn DHCP OK Next Finish

Ta hon tt vic ci t dch v DHCP. Cu hnh DHCP Server Click Start - Programs - Administrative Tools. Sau chn DHCP. Mc tiu trong bi ny ta mun cu hnh hai vng i ch IP dnh cho 2 h thng mng khc nhau l NET1 v NET2 Mi vng nh vy DHCP gi l Scope To Scope cho NET1 Right-click vo tn ca DHCP server. Sau click New Scope v click Next

Nhp tn v m t scope. Click Next

Nhp dy a ch IP m ta s dng cp cho cc my con (DHCP clients)

Trong bi ny ta s dng dy 192.168.200.10 - 192.168.200.200 Click Next Trong phn Exclusion cho php ta loi tr mt s a ch IP khng cp cho my con trong vng Range chn. Vic ny c th trnh mt s dy a ch IP ca cc Servers hoc thit b mng nh my in, Camera IP... Bi ny ti v d l dy t 192.168.200.100 n 192.168.200.120

Click Add - Chn Next Lease Duration l thi gian cho thu mt a ch IP gn vi mt my no , ht thi gian ny th my s l cng vic cp li a ch IP.

Click Next Sau click Yes, I want to configure these options now cu hnh cc thng s ty chn cho client. Click Next. Nhp a ch IP ca Default Gateway (192.168.200.254) - Add - Next

Nhp DNS m DHCP Server s cp cho clients. Nu my client thuc h thng Domain th ta nh lun tn Domain v Name Server cho DHCP test.(192.168.200.1)

Click Add - Next Tng t ta nhp a ch IP ca WINS Server v hp thoi - Add - Next

Click Yes, I want to activate this scope now bt u cho php DHCP kch hot scope ny. Sau click Next. Chn Finish Click Chut phi vo Server chn Authorize cho php chng thc my DHCP ny. n y ta cu hnh xong mt Scope cho vng NET1. kim tra xem DHCP c hot ng c khng ta s dng my Windows XP kt ni ti vng mng NET1. Trn dng lnh DOS ta s dng cc lnh IPconfg /release h b IP c v IPconfig /renew nhn li a ch IP mi.

Phn II: Xy Dng DHCP Relay Agent Cu hnh Scope mi cho vng mng NET2 Trn my DHCP SERVER Trn my DHCP Server ta m dch v DHCP. Click chut phi vi DHCP chn NewScope Click Next t tn cho vng Scope v phn m t

Click Next Nhp Range IP s cp cho vng NET2

Phn Exclusion ta b qua Click Next Lease Duration ta mc nh - click Next Chn Yes, I want to configure these options now Next Nhp a ch IP Default ca mng NET2

Click Add chn Next Nhp Domain ca h thng mng cng ty

Click Add Chn Next Nhp thng s WINS ca mng NET2

Click Yes, I want to activate this scope now Next Finish

Kim tra li DHCP Server phi c y 2 Scope nh trong hnh.

Cu hnh Router My s dng l Router ta cu hnh a ch IP cho 2 Card mng nh sau: NET1: 192.168.200.254 255.255.255.0 NET2: 192.168.100.254 255.255.255.0 Bt chc nng nh tuyn (LAN Routing) trong phn Routing and Remote Access. Phn ny cc bn c th tham kho trong bi LAB Routing Cu hnh Relay Agent trn my DHCP Agent ca mng NET2

Trc tin ta kim tra xem kt ni t my Agent n DHCP Server bng lnh ping

Click Chn Start Programs Administrative Tools Chn Routing and Remote Access

Ti ca s Routing and Remote Access Click chut phi v Relay Agent chn Configure and Enable Routing and Remote Access

Click Next

Chn Custom configuration Next

Chn LAN Routing Next

Lc ny Relay Agent s khi ng chc nng Routing. M Relay Agent Chn IP Routing Click chut phi vi General chn New Routing Protocol

Chn DHCP Relay Agent OK

Ta thy xut hin dng DHCP Relay Agent Click chut phi chn Properties Hp thoi cho php ta nhp vo a ch IP ca DHCP Server m ta s lin lc xin a ch IP

Nhp a ch IP ca DHCP Server (192.168.200.2) OK Tip tc ta click chut phi v DHCP Relay Agent chn New Interface Hp thoi s lit k cc interface c trn my Agent. Ta s Add nhng Interface no kt ni ti vng mng m ta s chn my ny l Agent.

y ta chn interface: Local Area Connection OK

Phn thng tin v packets c gi i khai bo thng s chng bit c t Agent i ti DHCP Server l qua bao nhiu HOP v thi gian ch cho gi tin tr v l bao nhiu. Cc ny ph thuc v h thng mng ca bn kt ni nh th no m ta s khai bo cho thch hp.

Ta chn thng s mc nh OK Lc ny ta cu hnh xong cho Agent. kim tra ta cng dng my XP cm vo h thng mng NET2 Dng cc lnh nh trn nhn li a ch IP