Cisco Packet Tracer Three-tier switch interrupts DHCP

Lab Environment:

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Experimental Purpose:

1, the VLAN is divided on the three layer switching: vlan10\vlan100\vlan200, and the IP is specified as: 192.168.10.254\ 192.168.100.254\ 192.168.200.254.

2, the FA0/1 \ fa02 \ fa04 respectively divided into the vlan100\ VLAN VLAN10.

3. Enable the routing protocol on the three-layer switch to enable interoperability between VLANs. (If you are simply trying to get an IP address, you are not using a routing protocol)

4. Enable IP helper-address on each VLAN on the three-layer switch.

5. Add the IP address pool on the server.

6. Check if the PC can get the IP address properly.

1, the VLAN is divided on the three layer switching: vlan10\vlan100\vlan200, and the IP is specified as: 192.168.10.254\ 192.168.100.254\ 192.168.200.254.

Switch#conf T

Enter configuration commands, one per line. End with cntl/z.

Switch (config) #vlan 10

Switch (Config-vlan) #exit

Switch (config) #vlan 100

Switch (Config-vlan) #exit

Switch (config) #vlan 200

Switch (Config-vlan) #exit

Switch (config) #int VLAN 10

Switch (config-if) #

%link-5-changed:interface Vlan10, CHANGED state-to-up

Switch (config-if) #ip add 192.168.10.254 255.255.255.0

Switch (config-if) #no shutdown

Switch (config-if) #exit

Switch (config) #int VLAN 100

Switch (config-if) #

%link-5-changed:interface Vlan100, CHANGED state-to-up

Switch (config-if) #ip add 192.168.100.254 255.255.255.0

Switch (config-if) #no shutdown

Switch (config-if) #exit

Switch (config) #int VLAN 200

Switch (config-if) #

%link-5-changed:interface Vlan200, CHANGED state-to-up

Switch (config-if) #ip add 192.168.200.254 255.255.255.0

Switch (config-if) #no shutdown

2, the FA0/1 \ fa02 \ fa04 respectively divided into the vlan100\ VLAN VLAN10.

Switch (config) #int FA0/1

Switch (config-if) #switchport mode access

Switch (config-if) #switchport Access VLAN 100

Switch (config-if) #

%lineproto-5-updown:line protocol on Interface Vlan100, changed

Switch (config-if) #exit

Switch (config) #int FA0/2

Switch (config-if) #switchport mode access

Switch (config-if) #switchport access VLAN 200

Switch (config-if) #

%lineproto-5-updown:line protocol on Interface Vlan200, changed

Switch (config-if) #exit

Switch (config) #int FA0/4

Switch (config-if) #switchport mode access

Switch (config-if) #switchport Access VLAN 10

3. Enable the routing protocol on the three-layer switch to enable interoperability between VLANs.

Switch (config) #ip routing

Switch (config) #router rip

Switch (config-router) #ver 2

Switch (config-router) #no au

Switch (config-router) #net 192.168.10.0

Switch (config-router) #net 192.168.100.0

Switch (config-router) #net 192.168.200.0

Switch (Config-router) #exit

4. Enable IP helper-address on each VLAN on the three-layer switch.

Switch (config) #int VLAN 10

Switch (config-if) #ip helper-address 192.168.10.1 (DHCP server IP)

Switch (config-if) #exit

Switch (config) #int VLAN 100

Switch (config-if) #ip helper-address 192.168.10.1

Switch (config-if) #exit

Switch (config) #int VLAN 200

Switch (config-if) #ip helper-address 192.168.10.1

Switch (config-if) #exit

5. Add the IP address pool on the server.

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6, check whether the PC can obtain the IP address normally, as follows:

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Cisco Packet Tracer Three-tier switch interrupts DHCP