Exercice 4.3.8 : Configure Layer 3 Switching and Inter-VLAN Routing

Part 1: Configure Layer 3 Switching

Step 1: Configure G0/2 as a Routed Port

1. Command Sequence:

   MLS(config)# interface g0/2
   MLS(config-if)# no switchport
   MLS(config-if)# ip address 209.165.200.225 255.255.255.252

2. Verification:

   • Ping 209.165.200.226:

     MLS# ping 209.165.200.226

     Output:

     Type escape sequence to abort.
     Sending 5, 100-byte ICMP Echos to 209.165.200.226, timeout is 2 seconds:
     .!!!!
     Success rate is 80 percent (4/5), round-trip min/avg/max = 0/0/0 ms

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Part 2: Configure Inter-VLAN Routing

Step 1: Add VLANs

1. Command Sequence:

   MLS(config)# vlan 10
   MLS(config-vlan)# name Staff
   
   MLS(config)# vlan 20
   MLS(config-vlan)# name Student
   
   MLS(config)# vlan 30
   MLS(config-vlan)# name Faculty

Step 2: Configure SVI Interfaces

1. Commands for VLAN 10:

   MLS(config)# interface vlan 10
   MLS(config-if)# ip address 192.168.10.254 255.255.255.0

2. Commands for VLAN 20:

   MLS(config)# interface vlan 20
   MLS(config-if)# ip address 192.168.20.254 255.255.255.0
   MLS(config-if)# ipv6 address 2001:db8:acad:20::1/64

3. Commands for VLAN 30:

   MLS(config)# interface vlan 30
   MLS(config-if)# ip address 192.168.30.254 255.255.255.0
   MLS(config-if)# ipv6 address 2001:db8:acad:30::1/64

4. Commands for VLAN 99:

   MLS(config)# interface vlan 99
   MLS(config-if)# ip address 192.168.99.254 255.255.255.0

Step 3: Configure Trunking

1. On MLS:

   MLS(config)# interface g0/1
   MLS(config-if)# switchport mode trunk
   MLS(config-if)# switchport trunk native vlan 99
   MLS(config-if)# switchport trunk encapsulation dot1q

2. On S1:

   S1(config)# interface g0/1
   S1(config-if)# switchport mode trunk
   S1(config-if)# switchport trunk native vlan 99

Step 4: Enable Routing

1. Verify routing:

   MLS> show ip route

2. Enable routing:

   MLS(config)# ip routing

3. Verify active routes:

   MLS# show ip route

Step 5: Verify End-to-End Connectivity

• Ping tests:

  • From PC0 to PC3, PC1 to PC4, and PC2 to PC5.

  • Verify inter-VLAN and external connectivity.

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Part 3: Configure IPv6 Inter-VLAN Routing

Step 1: Enable IPv6 Routing

1. Command:

   MLS(config)# ipv6 unicast-routing

Step 2: Configure SVI for IPv6

1. Example for VLAN 10:

   MLS(config)# interface vlan 10
   MLS(config-if)# ipv6 address 2001:db8:acad:10::1/64

2. Repeat for VLANs 20 and 30.

Step 3: Configure IPv6 Address on G0/2

1. Command:

   MLS(config)# interface G0/2
   MLS(config-if)# ipv6 address 2001:db8:acad:a::1/64

Step 4: Verify IPv6 Routing and Connectivity

• Use the show ipv6 route command:

  MLS# show ipv6 route

• Perform IPv6 ping tests:

  • From PC3, PC4, and PC5 to MLS.

  • Verify inter-VLAN IPv6 routing.