The principle of layer-3 switching and the principle of DHCP are not explained here. Here we use a case to learn how to use layer-3 switching as a DHCP server and assign IP addresses to different network segments. In the production environment, it is common to use routers or switches as DHCP servers.
Lab requirements:
1. Configure the DHCP service on SW1 to assign IP addresses of different network segments to the following four different departments.
2. Configure The VTP Server on SW1, configure the VTP Client on SW2 and SW3, and add the specified department to the relevant VLAN.
3. Note: A relay link is used between the vswitch and the vswitch, but not between the vro.
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The detailed configuration information is as follows:
The R1 configuration is as follows:
# Configure the vro Intranet interface IP address and Internet interface IP Address
R1 (config) # int f0/0
R1 (config-if) # ip add 10.0.0.2 255.0.0.0
R1 (config-if) # no sh
R1 (config-if) # no shutdown
R1 (config-if) # exit
R1 (config) # int f1/0
R1 (config-if) # ip add 202.106.123.1 255.255.255.248
R1 (config-if) # no sh
R1 (config-if) # no shutdown
# Static route entries configured to the Intranet
R1 (config) # ip route 192.168.1.0 255.255.255.0 10.0.0.1
R1 (config) # ip route 192.168.2.0 255.255.255.0 10.0.0.1
R1 (config) # ip route 192.168.3.0 255.255.255.0 10.0.0.1
R1 (config) # ip route 192.168.4.0 255.255.255.0 10.0.0.1
The SW1 configuration is as follows:
# IP address configured to the router interface
SW1 (config) # ip routing
SW1 (config) # int f0/0
SW1 (config-if) # no switchport
SW1 (config-if) # ip add 10.0.0.1 255.0.0.0
SW1 (config-if) # no shutdown
# Configure the interface link between vswitches as a relay link (trunk)
SW1 (config) # int range f0/1-2
SW1 (config-if-range) # switchport mode trunk
SW1 (config-if-range) # no sh
# Configuring VTP Server
SW1 # vlan database
SW1 (vlan) # vtp domain test
SW1 (vlan) # vtp server
SW1 (vlan) # vtp password 123
SW1 (vlan) # vtp pruning
# Create a vlan (create different VLANs for the four departments)
SW1 # vlan database
SW1 (vlan) # vlan 10
SW1 (vlan) # vlan 20
SW1 (vlan) # vlan 30
SW1 (vlan) # vlan 40
# Configuring vlan Virtual Interface addresses
SW1 (config-if) # int vlan 10
SW1 (config-if) # ip add 192.168.1.1 255.255.255.0
SW1 (config-if) # no sh
SW1 (config-if) # exit
SW1 (config-if) # int vlan 20
SW1 (config-if) # ip add 192.168.2.1 255.255.255.0
SW1 (config-if) # no sh
SW1 (config-if) # exit
SW1 (config-if) # int vlan 30
SW1 (config-if) # ip add 192.168.3.1 255.255.255.0
SW1 (config-if) # no sh
SW1 (config-if) # exit
SW1 (config-if) # int vlan 40
SW1 (config-if) # ip add 192.168.4.1 255.255.255.0
SW1 (config-if) # no sh
# Note: to configure the DHCP relay service, you need to add a DHCP server address SW1 (config-if) # ip helper-address [DHCP server address] In the vlan Virtual Interface.
# Configure a default route to enable Internet access
SW1 (config) # ip route 0.0.0.0 0.0.0.0 10.0.0.2
# Configure the DHCP address pool for different network segments (four network segment address pools are required because there are four VLANs)
SW1 (config) # ip dhcp pool vlan10
SW1 (dhcp-config) # network 192.168.1.0 255.255.255.0
SW1 (dhcp-config) # default-router 192.168.1.1
SW1 (dhcp-config) # dns-server 202.106.0.20
SW1 (dhcp-config) # lease 2
SW1 (dhcp-config) # exit
SW1 (config) # ip dhcp pool vlan20
SW1 (dhcp-config) # network 192.168.2.0 255.255.255.0
SW1 (dhcp-config) # default-router 192.168.2.1
SW1 (dhcp-config) # dns-server 202.106.0.20
SW1 (dhcp-config) # lease 2
SW1 (dhcp-config) # exit
SW1 (config) # ip dhcp pool vlan30
SW1 (dhcp-config) # network 192.168.3.0 255.255.255.0
SW1 (dhcp-config) # default-router 192.168.3.1
SW1 (dhcp-config) # dns-server 202.106.0.20
SW1 (dhcp-config) # lease 2
SW1 (dhcp-config) # exit
SW1 (config) # ip dhcp pool vlan40
SW1 (dhcp-config) # network 192.168.4.0 255.255.255.0
SW1 (dhcp-config) # default-router 192.168.4.1
SW1 (dhcp-config) # dns-server 202.106.0.20
SW1 (dhcp-config) # lease 2
# Note: If you want to set a reserved address, you can configure ip dhcp excluded-address low-address [high-address].
The SW2 configuration is as follows:
# Configure the link for layer-3 switching as a relay link (trunk)
SW2 (config) # int f0/0
SW2 (config-if) # switchport mode trunk
SW2 (config-if) # no sh
# Configure the VTP client (After configuring the VTP client, you can learn the vlan created on the layer-3 Switch)
SW2 # vlan database
SW2 (vlan) # vtp domain test
SW2 (vlan) # vtp client
SW2 (vlan) # vtp password 123
SW2 (vlan) # vtp pruning
# Add the specified interface to the corresponding vlan
SW2 (config) # int f0/1
SW2 (config-if) # switchport access vlan 10
SW2 (config-if) # no sh
SW2 (config-if) # exit
SW2 (config-if) # int f0/2
SW2 (config-if) # switchport access vlan 20
SW2 (config-if) # no sh
The SW3 configuration is as follows:
# Configure the link for layer-3 switching as a relay link (trunk)
SW3 (config) # int f0/0
SW3 (config-if) # switchport mode trunk
SW3 (config-if) # no sh
# Configure the VTP client (After configuring the VTP client, you can learn the vlan created on the layer-3 Switch)
SW3 # vlan database
SW3 (vlan) # vtp domain test
SW3 (vlan) # vtp client
SW3 (vlan) # vtp password 123
SW3 (vlan) # vtp pruning
# Add the specified interface to the corresponding vlan
SW3 (config) # int f0/1
SW3 (config-if) # switchport access vlan 30
SW3 (config-if) # no sh
SW3 (config-if) # exit
SW3 (config-if) # int f0/2
SW3 (config-if) # switchport access vlan 40
SW3 (config-if) # no sh
After all the above configurations are configured, the client can automatically obtain the corresponding IP address and access the Internet by setting the IP address to DHCP.
This article is from the "initialize" blog, please be sure to keep this source http://cshbk.blog.51cto.com/5685776/1251038