How does a multi-layer switch realize interconnection between different network segments ?, Multi-layer switch

How does a multi-layer switch realize interconnection between different network segments ?, Multi-layer switch

Lab Name:How does a multi-layer switch implement intercommunication between different network segments?

Lab requirements:

(1) layer-3 switches are gateways of vlan10, 20, 30, and 40 respectively.

(Gateway IP-192.168.X.250/24)

Vlan 10 192.168.10.0/24

Vlan 20 192.168.20.0/24

Vlan 30 192.168.30.0/24

Vlan 40 192.168.40.0/24

(2) The Gateway runs ospf to achieve network interconnection,

(3) Each vswitch can be remotely accessed.

Lab notes:This experiment requires eight PCs and one multi-layer switch of the 3560 model.

Command entered by four switches in the blue bold font

Experiment Configuration:Configure the IP address subnet mask and gateway for each pc.

 

① First achieve interconnection with network segments

Switch>

Switch> enable

Switch # config terminal

Switch (config) # hostname gw1 gw2 gw3

Gw1 gw2 gw 3 (config) # line con 0

Gw1 gw2 gw 3(Config-line) # exec-t

Gw1 gw2 gw 3(Config-line) # exec-timeout 0 0

Gw1 gw2 gw 3(Config-line) # exit

Gw1 gw2 gw 3(Config) # vlan 10

Gw1 gw2 gw 3(Config-vlan) # vlan 20

Gw1 gw2 gw 3(Config-vlan) # vlan 30

Gw1 gw2 gw 3(Config-vlan )#

Gw1 gw2 gw 3(Config-vlan) # vlan 40

Gw1 gw2 gw 3(Config-vlan) # exit

Gw1 (config) # inter vlan 10

Gw1 (config-if) # ip address 192.168.10.250 255.255.255.0

Gw1 (config-if) # exit

Gw1 (config) # inter fa0/1

Gw1 (config-if) # sw mo acc

Gw1 (config-if) # sw acc vl 10

Gw1 (config-if) # exit

Gw1 (config) # inter fa0/2

Gw1 (config-if) # sw mo acc

Gw1 (config-if) # sw acc vl 20

Gw1 (config-if) # exit

Gw2 (config) # inter vlan 20

Gw2 (config-if) # ip address 192.168.20.250 255.255.255.0

Gw2 (config-if) # exit

Gw2 (config) # inter fa0/1

Gw2 (config-if) # sw mo acc

Gw2 (config-if) # sw acc vl 10

Gw2 (config-if) # exit

Gw2 (config) # inter fa0/2

Gw2 (config-if) # sw mo acc

Gw2 (config-if) # sw acc vl 30

Gw2 (config-if) # exit

Gw3 (config) # inter vlan 30

Gw3 (config-if) # ip address 192.168.30.250 255.255.255.0

Gw3 (config-if) # exit

Gw3 (config) # inter fa0/1

Gw3 (config-if) # sw mo acc

Gw3 (config-if) # sw acc vl 40

Gw3 (config-if) # exit

Gw3 (config) # inter fa0/2

Gw3 (config-if) # sw mo acc

Gw3 (config-if) # sw acc vl 30

Gw3 (config-if) # exit

Gw4 (config) # inter vlan 40

Gw4 (config-if) # ip address 192.168.40.250 255.255.255.0

Gw4 (config-if) # exit

Gw4 (config) # inter fa0/1

Gw4 (config-if) # sw mo acc

Gw4 (config-if) # sw acc vl 20

Gw4 (config-if) # exit

Gw4 (config) # inter fa0/2

Gw4 (config-if) # sw mo acc

Gw4 (config-if) # sw acc vl 40

Gw4 (config-if) # exit

Gw1 gw2 gw 3(Config) # inter range fa0/23, fa0/24

Gw1 gw2 gw 3(Config-if-range) # channel-group 1 mode on

Gw1 gw2 gw 3(Config-if-range) # exit

Gw1 gw2 gw 3(Config) # inter port-channel 1

Gw1 gw2 gw 3(Config-if) # no shut

Gw1 gw2 gw 3(Config-if) # switchport trunk encapsulation dot1q

Gw1 gw2 gw 3(Config-if) # switchport mode t

Gw1 gw2 gw 3(Config-if) # exit

Gw1 gw2 gw 3(Config) # inter range fa0/21, fa0/22

Gw1 gw2 gw 3(Config-if-range) # channel-group 2 mode on

Gw1 gw2 gw 3(Config-if-range) # exit

Gw1 gw2 gw 3(Config) # inter port-channel 2

Gw1 gw2 gw 3(Config-if) # switchport trunk encapsulation d

Gw1 gw2 gw 3(Config-if) # sw mo tr

Gw1 gw2 gw 3(Config-if) # exit

Verify that the same network segment can communicate with each other. ping x. x

Achieve interconnection between different network segments

Gw1 (config) # vlan 12

Gw1 (config-vlan) # name gw1-gw2

Gw1 (config-vlan) # vlan 48

Gw1 (config-vlan) # name gw4-gw1

Gw1 (config-vlan) # exit

Gw1 (config) # inter vlan 12

Gw1 (config-if) # no shut

Gw1 (config-if) # ip address 10.10.12.1 255.255.255.0

Gw1 (config-if) # exit

Gw1 (config) # inter vlan 48

Gw1 (config-if) # no shut

Gw1 (config-if) # ip address 10.10.48.2 255.255.255.0

Gw1 (config-if) # exit

Gw1 (config) # ip routing

Gw1 (config) # router ospf 1

Gw1 (config-router) # network 192.168.10.250 0.0.0.0 area 0

Gw1 (config-router) # network 10.10.12.1 0.0.0.0 area 0

Gw1 (config-router) # network 10.10.48.2 0.0.0.0 area 0

Gw1 (config-router) # end

Gw2 (config) # vlan 12

Gw2 (config-vlan) # name gw1-gw2

Gw2 (config-vlan) # vlan 24

Gw2 (config-vlan) # name gw2-gw3

Gw2 (config-vlan) # exit

Gw2 (config) # inter vlan 12

Gw2 (config-if) # no shut

Gw2 (config-if) # ip address 10.10.12.2 255.255.255.0

Gw2 (config-if) # exit

Gw2 (config) # inter vlan 24

Gw2 (config-if) # no shut

Gw2 (config-if) # ip address 10.10.24.1 255.255.255.0

Gw2 (config-if) # exit

Gw2 (config) # ip routing

Gw2 (config) # router ospf 1

Gw2 (config-router) # network 192.168.255.250 0.0.0.0 area 0

Gw2 (config-router) # network 10.10.12.2 0.0.0.0 area 0

Gw2 (config-router) # network 10.10.24.1 0.0.0.0 area 0

Gw2 (config-router) # end

Gw3 (config) # vlan 24

Gw3 (config-vlan) # name gw2-gw3

Gw3 (config-vlan) # vlan 36

Gw3 (config-vlan) # name gw3-gw4

Gw3 (config-vlan) # exit

Gw3 (config) # inter vlan 24

Gw3 (config-if) # no shut

Gw3 (config-if) # ip address 10.10.24.2 255.255.255.0

Gw3 (config-if) # exit

Gw3 (config) # inter vlan 36

Gw3 (config-if) # no shut

Gw3 (config-if) # ip address 10.10.36.1 255.255.255.0

Gw3 (config-if) # exit

Gw3 (config) # ip routing

Gw3 (config) # router ospf 1

Gw3 (config-router) # network 192.168.30.250 0.0.0.0 area 0

Gw3 (config-router) # network 10.10.24.2 0.0.0.0 area 0

Gw3 (config-router) # network 10.10.36.1 0.0.0.0 area 0

Gw3 (config-router) # end

Gw4 (config) # vlan 36

Gw4 (config-vlan) # name gw3-gw4

Gw4 (config-vlan) # vlan 48

Gw4 (config-vlan) # name gw4-gw1

Gw4 (config-vlan) # exit

Gw4 (config) # inter vlan 36

Gw4 (config-if) # no shut

Gw4 (config-if) # ip address 10.10.36.2 255.255.255.0

Gw4 (config-if) # exit

Gw4 (config) # inter vlan 48

Gw4 (config-if) # no shut

Gw4 (config-if) # ip address 10.10.48.1 255.255.255.0

Gw4 (config-if) # exit

Gw4 (config) # ip routing

Gw4 (config) # router ospf 1

Gw4 (config-router) # network 192.168.40.250 0.0.0.0 area 0

Gw4 (config-router) # network 10.10.36.2 0.0.0.0 area 0

Gw4 (config-router) # network 10.10.48.1 0.0.0.0 area 0

Gw4 (config-router) # end

Verify that different network segments can communicate with each other using the show IP route command

Show IP route ospf

Ping x. x

Enable remote access

Gw1 gw2 gw 3# Config terminal

Gw1 gw2 gw 3(Config) # line vty 0 4

Gw1 gw2 gw 3(Config-line) # password 123123

Gw1 gw2 gw 3(Config-line) # exit

Gw1 gw2 gw 3(Config) # enable sec

Gw1 gw2 gw 3(Config) # enable secret 123123

Gw1 gw2 gw 3(Config )#

Verify the command telnet x. x (gateway IP)

Experiment conclusion: multi-layer switches enable intercommunication between different network segments, which is a route between VLANs.