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.