PingingLab series CCNA full Configuration Guide-Layer 3 Switch 3.12

3.12 layer-3 Switching

Purpose:

1. master the basic configurations of layer-3 switching for inter-VLAN communication.

2. Understand the implementation principle of layer-3 switching.

Tutorial topology:

650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/062203O08-0.png "title =" 3.12.png "/>

Tutorial steps:

1. Deploy the Trunk link between SW1 and SW2 Based on the topology shown in the figure. The configuration is as follows:

SW1 (config) # int f0/0

SW1 (config-if) # switchport trunk encapsulation dot1q

SW1 (config-if) # switchport mode trunk

SW1 (config-if) # exit

SW2 (config) # int f0/0

SW2 (config-if) # switchport trunk encapsulation dot1q

SW2 (config-if) # switchport mode trunk

SW2 (config-if) # exit

2. Deploy VTP technology. SW1 is the Server, and SW2 is the Client to implement VLAN synchronization as follows:

SW1 # vlan database

SW1 (vlan) # vtp server

SW1 (vlan) # vtp domain pinginginglab

SW1 (vlan) # vtp password cisco

SW1 (vlan) # vlan 10

SW1 (vlan) # vlan 20

SW1 (vlan) # exit

SW2 # vlan database

SW2 (vlan) # vtp client

SW2 (vlan) # vtp domain pinginginglab

SW2 (vlan) # vtp password cisco

SW2 (vlan) # exit

3. Confirm VTP Information Synchronization and add the interface to the corresponding VLAN, as shown below:

SW2 # show vlan-switch brief

VLAN NameStatusPorts

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

1DefaultActiveFa0/1, 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

10VLAN0010Active

20VLAN0020Active

1002 fddi-defaultActive

1003 token-ring-defaultActive

1004 fddinet-defaultActive

1005 trnet-defaultActive

As you can see, SW2 has learned about VLAN10 and VLAN20. It is configured as follows:

SW2 (config) # int f0/1

SW2 (config-if) # switchport mode access

SW2 (config-if) # switchport access vlan 10

SW2 (config-if) # int f0/2

SW2 (config-if) # switchport mode access

SW2 (config-if) # switchport access vlan 20

SW2 (config-if) # exit

4. Configure IP addresses for different PCs Based on the topology as follows:

PC1 (config) # no ip routing [PL1]

PC1 (config) # int f0/0

PC2 (config-if) # no sh

PC1 (config-if) # ip address 192.168.10.1 255.255.255.0

PC1 (config-if) # exit

PC1 (config) # ip default-gateway 192.168.10.254 [PL2]

PC2 (config) # no ip routing

PC2 (config) # int f0/0

PC2 (config-if) # no sh

PC2 (config-if) # ip address 192.168.20.1 255.255.255.0

PC2 (config-if) # exit

PC2 (config) # ip default-gateway 192.168.255.254

5. Enable layer-3 routing on a layer-3 Switch and define different IP addresses for different VLANs, as shown below:

SW1 (config) # ip routing [PL3]

SW1 (config) # int vlan 10

SW1 (config-if) # ip address 192.168.10.254 255.255.255.0

SW1 (config-if) # exit

SW1 (config) # int vlan 20

SW1 (config-if) # ip address 192.168.255.254 255.255.255.0

SW1 (config-if) # exit

6. Test layer-3 switching, as shown below:

① Test the connectivity between the host and the gateway.

PC1 # ping 192.168.10.254

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.10.254, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 20/227/1036 MS

② Test the connectivity between the host and the host

PC1 # ping 192.168.20.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.20.1, timeout is 2 seconds:

.!!!!

Success rate is 80 percent (4/5), round-trip min/avg/max = 24/48/84 MS

From the above, we can see that through the deployment of layer-3 switching technology, the host between VLANs can communicate with each other. This experiment is complete.

[PL1]Disable layer-3 routing to simulate hosts.

[PL2]Define the default gateway.

[PL3]Enable the layer-3 routing function. By default, the layer-3 Switch disables the routing function. To enable inter-VLAN communication, you must enable it.

========================================================== =

PingingLab· High quality ITEducation provider

CCIELab-ITProject Practice · customization of high-end Talents

Shenzhen pinke Information Technology Co., Ltd. · waihuan West Road Station, Guangzhou University City

Sina Weibo :@PingingLab@ PingingLab-Chen xinjie

PingingLabPublic Account: pinginglab

PingingLabTechnical Exchange Group: 240920680

650) this. length = 650; "src =" http://s6.sinaimg.cn/mw690/d37011a2gx6BJaUMtiR85&690 "real_src =" http://s6.sinaimg.cn/mw690/d37011a2gx6BJaUMtiR85&690 "name =" image_operate_13921376062848408 "alt =" PingingLab classic series "CCNA full Configuration Guide"-3.12 <wbr> layer-3 switching "title =" pingingLab-3.12 <wbr> layer-3 switching "/>

This article from the "Chen xinjie network" blog, please be sure to keep this source http://chenxinjie.blog.51cto.com/7749507/1274496