Campus Network Design - Network Setup

In this tutorial, we will establish dual-stack network connectivity within all nodes of the network given below.

IP Address Plan

Device Management IP Address MGT Network MGT VLAN
FAC1 10.XY.2.0/24 VLAN 2
FAC1-BLD1-FL0 10.XY.2.2 Ignore(LAB only) 10.XY.2.0/24 VLAN 2
FAC1-BLD1-FL1 10.XY.2.3 Ignore(LAB only) 10.XY.2.0/24 VLAN 2
FAC1-BLD1-FL2 10.XY.2.4 10.XY.2.0/24 VLAN 2
FAC1-BLD2-FL0 10.XY.2.5 Ignore(LAB only) 10.XY.2.0/24 VLAN 2
FAC2 10.XY.3.0/24 VLAN 3
FAC2-BLD1-FL1 10.XY.3.2 Ignore(LAB only) 10.XY.3.0/24 VLAN 3
FAC2-BLD2-FL1 10.XY.3.3 Ignore(LAB only) 10.XY.3.0/24 VLAN 3
FAC2-BLD2-FL3 10.XY.3.4 Ignore(LAB only) 10.XY.3.0/24 VLAN 3
WINXP_INSIDE 10.XY.30.10 10.XY.30.0/24 VLAN 30

Note:User can change value for XY with any valid number.

F0/0 Routed Link 10.XY.0.6/30
F0/1 Routed Link 10.XY.0.1/30
F1/0 Trunk 10, 20 2
F1/1 Trunk 20, 30 2
F1/15 Access 5 -

F0/1 Routed Link 10.XY.0.5/30
F1/0 Trunk 60, 70 3
F1/1 Trunk 70, 80 3

Log in to the the devices

First double click on the "Dynamips server" short cut from your desktop. It will open the dynamips console.Then run the file inside LabFiles folder. It will open the dynagen console.

In dynagen console type command "list" and it will show you the running devices and console port associated with them.Use terminal emulator (putty) to login to device using Telnet with local host ip with associated port.

Initial Configurations

Before configuring the devices for the network setup. Let's configure some initial settings in the Core Network Devices.

Once you connect using putty you will see Would you like to enter the initial configuration dialog? [yes/no]: Type no to go to the user mode of the FAC1 switch. Prompt will look as follows.


Type enable to go to privileged mode. This will change prompt as follows.


In this privileged mode, you can check the router configuration by the following command. The configuration you see will be the default configuration

Router#show run

To add configurations you have to go configuration mode. Type config terminal. Note the prompt change.


note: If you get following error,

%Error opening tftp:// (Timed out)

Give the following command in the config mode, no service config

You can now start making configurations.

  • The first thing you have to add is the hostname of the device. The hostname is the device's identification. In this Lab, device name or the hostname need to be configured as shown in the dynagen console which you saw previously. To change it you may use
    hostname <device name>
  • Then let's give a enable secret. Which is a password you set when you go to the privileged mode from the user mode? Make sure to use the cisco as the enable secret
    enable secret <class password>
  • Add the DNS server
    ip name-server 10.XY.0.2

In your production environment you may use your internal DNS resolver if needed.

  • Next, you can add a banner to your device. This will display every time you log in to the device
    banner motd @ Unauthorized Access is Prohibited! @
  • Add more security by encrypting passwords in your config file
    service password-encryption
  • Then lets's configure the line console which is the console port settings
    • Go to line console config mode
      line console 0
    • Enable login authentication. Make sure not to save or exit the router after this command without executing the next command.
    • Set the password
      password <class password>
  • Finally let's enable ssh (version 2) in the device. Type exit to go back to previous mode (config mode) from line console config mode
    • Configure a domain name. Use for this lab where XY is your group id.
      ip domain name
    • Create an ssh user with a password. In here we will use the username admin with the class password
      username admin secret <class password>
    • Create a certificate which will use for encryption
      crypto key generate rsa
    • Give the size of key as 768 (minimum size needed to activate ssh version 2)
    • Then Configure the line vty
      line vty 0 4
      login local
      transport input ssh
  • Add SNMP community and location details
    snmp-server community CNBP2022 ro
    snmp-server ifindex persist
    snmp-server contact NOC
    snmp-server location Faculty_One
  • Now save the configurations. you have to Go to privileged mode and give the following command
    #copy running-config startup-config
  • Check the configuration by show run command.

Apply these settings in FAC2 and FAC1-BLD1-FL2 as well

Core Network Layer

Let's start Configuring the connectivity between the core network (FAC1 and Fac2). We will start with Fac1.

  • Remember, the core network runs on routed ports. Get the IP from the table
  • Link to Firewall
    FAC1(config)# interface fastEthernet 0/1
    FAC1(config-if)# description Link to Firewall
    FAC1(config-if)# ip address 10.XY.0.1
    FAC1(config-if)#ipv6 address 2401:dd00:20XY:1::fffe/64
    FAC1(config-if)#no shutdown
  • Link to FAC2
    FAC1(config)# interface fastEthernet 0/0
    FAC1(config-if)# description Link to FAC2
    FAC1(config-if)# ip address 10.XY.0.6
    FAC1(config-if)#ipv6 address 2401:dd00:20XY:2::ffff/64
    FAC1(config-if)#no shutdown
  • On switch FAC2 we have only one routed port. Get the IP from the table
    • Link to FAC1
FAC2(config)# interface fastEthernet 0/1
FAC2(config-if)# description Link to FAC1
FAC2(config-if)# ip address 10.XY.0.5
FAC2(config-if)#ipv6 address 2401:dd00:20XY:2::fffe/64
FAC2(config-if)#no shutdown
  • Next, we need to configure routing among Core devices. We will configure dynamic routing / OSPF to distribute routing.
    • On FAC1, Define OSPF process and Process ID. In this lab use process ID as 1
      FAC1(config)#ip routing
      FAC1(config)#router ospf 1
    • Give the router ID
      FAC1(config-router)#router-id 10.XY.2.1
    • You are announcing the core network and connected subnets. Use this command for this
      FAC1(config-router)#redistribute connected subnets
      FAC1(config-router)#network 10.XY.0.0 area 2
    • Now you have enable OSPF on FAC1 Switch. Now lets add the default Route.
      FAC1(config)# ip route 10.XY.0.2
  • Now let's enable routing for IPv6.
    FAC1(config)# ipv6 unicast-routing
    • Create a OSPF v3 instance, Define OSPF process and Process ID. In this lab use process ID as 1
      FAC1(config)#ipv6 router ospf 1
    • Give the router ID, this will be the same as ipv4 ospf router ID for simplicity
      FAC1(config-rtr)#router-id 10.XY.2.1
    • You are going to redistribute the connected networks. Use this command for that,
      FAC1(config-rtr)#redistribute connected
    • Create the default route
      FAC1(config)ipv6 route ::/0 2401:DD00:20XY:1::FFFF
  • Assign ospf to Ports on FAC1
    FAC1(config)#int fa 0/0
    FAC1(config-if)#ip ospf 1 area 2
    FAC1(config-if)#ipv6 ospf 1 area 2
  • Configure routing on FAC2
    FAC2(config)#ip routing
    FAC2(config)#router ospf 1
    FAC2(config-router)#router-id 10.XY.3.1
    FAC2(config-router)#redistribute connected subnets
    FAC2(config-router)#network 10.XY.0.0 area 2
    FAC2(config)# ip route 10.XY.0.6
    FAC2(config)# ipv6 unicast-routing
    FAC2(config)#ipv6 router ospf 1
    FAC2(config-rtr)#router-id 10.XY.3.1
    FAC2(config)#int fa 0/1
    FAC2(config-if)#ip ospf 1 area 2
    FAC2(config-if)#ipv6 ospf 1 area 2
    FAC2(config)ipv6 route ::/0 2401:DD00:20XY:2::FFFF

VLAN Structure

Now we need to create VLANs in each L3 device and configure inter-VLAN routing. We will start with FAC1.

VLANs for FAC1

FAC1 VLAN Name IPv4 IPv6
VLAN02 FAC1_MGT 10.XY.02.1/24 -
VLAN05 Servers 10.XY.05.254/24 2401:DD00:20XY:5::FFFF/64
VLAN10 Dept1 10.XY.10.254/24 2401:DD00:20XY:1110::FFFF/64
VLAN20 Dept2 10.XY.20.254/24 2401:DD00:20XY:1120::FFFF/64
VLAN30 Dept3 10.XY.30.254/24 2401:DD00:20XY:1230::FFFF/64

  • First Create VLANs and provide a suitable description.
Fac1# vlan database
Fac1(vlan)# vlan 2 name FAC1_MGT

Repeat the same for all other VLAN's in FAC1.

  • Then we need to create vlan interfaces and assign routing.
Fac1(vlan)# exit
Fac1# config t
Fac1(config)# interface vlan 2
Fac1(config-if)# ip address 10.XY.2.1 
Fac1(config-if)# ip ospf 1 area 2
Fac1(config-if)# exit

Following illustrates the dual stack connectivity.

Fac1(config)# interface vlan 5
Fac1(config-if)# ip address 10.XY.5.254 
Fac1(config-if)# ip ospf 1 area 2
Fac1(config-if)# ipv6 address 2401:DD00:20XY:5::FFFF/64
Fac1(config-if)# ipv6 ospf 1 area 2
Fac1(config-if)# exit
  • Continue same for the VLAN 10, 20 and 30.

VLANs for FAC2

  • Configure above same configurations on FAC2 switch for the following VLAN data

FAC2 VLAN Name IPv4 IPv6
VLAN03 FAC2_MGT 10.XY.03.1/24 -
VLAN60 Dept4 10.XY.60.254/24 2401:DD00:20XY:2160::FFFF/64
VLAN70 Dept5 10.XY.70.254/24 2401:DD00:20XY:2270::FFFF/64
VLAN80 Dept6 10.XY.80.254/24 2401:DD00:20XY:2280::FFFF/64

Assign Interfaces

On L3 devices we can have three types of links,

  • L3 routed ports
  • Trunk ports
  • L2 Access Ports

We have already configured routed ports and now we need to assign ports to our VLAN's created above.

  • Create Trunk Ports,
    • First make the interface a trunk port. This is for the link between FAC1 and Building 1
      FAC1(config)#interface FastEthernet 1/0
      FAC1(config-if)#switchport mode trunk
    • Define the encapsulation
      FAC1(config-if)#switchport trunk encapsulation dot1q 
    • Give the Description of the interface
      FAC1(config-if)#description link to Building 1
    • Allow the VLAN's that we only need.
      FAC1(config-if)#switchport trunk allowed vlan 1,2,10,20,1002-1005
    • Change the Native VLAN
      FAC1(config-if)#switchport trunk native vlan 2

Do the same for the other trunk link

FAC1(config)#interface FastEthernet 1/1
FAC1(config-if)#switchport mode trunk
FAC1(config-if)#switchport trunk encapsulation dot1q 
FAC1(config-if)#description link to Building 2
FAC1(config-if)#switchport trunk allowed vlan 1,2,20,30,1002-1005
FAC1(config-if)#switchport trunk native vlan 2
  • Create Access ports.
    • Assign the interface to be in Access Mode
      FAC1(config)#interface FastEthernet 1/15
      FAC1(config-if)#switchport mode access
    • Assign the VLAN
      FAC1(config-if)#switchport access vlan 5
    • Assign a suitable description
      FAC1(config-if)#description link to Monitoring Server

Make sure to save your setting with FAC1#write and FAC2#write

Distribution Layer

For the lab purposes, we are using an L3 capable switch platform to illustrate a manageable L2 switch. We need to configure following on the FAC1-BLD1-FL2,

  • Management Network
  • Trunk Ports
  • Access Ports

Details of the switch as follows,

Fa1/0 Access 20 -
Fa1/13 Trunk 20 2
Fa1/14 Trunk 10 2
Fa1/15 Trunk 10,20 2

Configure Management Network

  • Create VLAN 2 which is the MGT Network for Faculty 1. Then assign an IP address for the VLAN 2 interface.
    FAC1-BLD1-FL2# vlan database
    FAC1-BLD1-FL2(vlan)# vlan 2 name FAC1_MGT
    FAC1-BLD1-FL2(vlan)# exit
    FAC1-BLD1-FL2# config t
    FAC1-BLD1-FL2(config)# interface vlan 2
    FAC1-BLD1-FL2(config-if)# ip address 10.XY.2.4 
    FAC1-BLD1-FL2(config-if)# exit
  • apply default routing for the subnet.
    FAC1-BLD1-FL2(config)#ip route 10.XY.2.1

Configure Trunk Ports

  • Before configuring trunks we need to define the vlans first.
    FAC1-BLD1-FL2# vlan database
    FAC1-BLD1-FL2(vlan)# vlan 10 name DEPT1
    FAC1-BLD1-FL2(vlan)# vlan 20 name DEPT2
  • This FAC1-BLD1-FL2 has three trunk ports configure them to allow VLAN 10,20 to fa1/15 and VLAN 10 on fa1/14 and VLAN 20 on fa1/15. We need to configure Native VLAN to VLAN 2 as well.
    FAC1-BLD1-FL2(config)#interface FastEthernet 1/15
    FAC1-BLD1-FL2(config-if)#switchport mode trunk
    FAC1-BLD1-FL2(config-if)#switchport trunk encapsulation dot1q 
    FAC1-BLD1-FL2(config-if)#description link to FAC1_L3
    FAC1-BLD1-FL2(config-if)#switchport trunk allowed vlan 1,2,10,20,1002-1005
    FAC1-BLD1-FL2(config-if)#switchport trunk native vlan 2
    FAC1-BLD1-FL2(config)#interface FastEthernet 1/14
    FAC1-BLD1-FL2(config-if)#switchport mode trunk
    FAC1-BLD1-FL2(config-if)#switchport trunk encapsulation dot1q 
    FAC1-BLD1-FL2(config-if)#description link to FAC1-BLD1-FL1A
    FAC1-BLD1-FL2(config-if)#switchport trunk allowed vlan 1,2,10,1002-1005
    FAC1-BLD1-FL2(config-if)#switchport trunk native vlan 2
    FAC1-BLD1-FL2(config)#interface FastEthernet 1/13
    FAC1-BLD1-FL2(config-if)#switchport mode trunk
    FAC1-BLD1-FL2(config-if)#switchport trunk encapsulation dot1q 
    FAC1-BLD1-FL2(config-if)#description link to FAC1-BLD1-FL1B
    FAC1-BLD1-FL2(config-if)#switchport trunk allowed vlan 1,2,20,1002-1005
    FAC1-BLD1-FL2(config-if)#switchport trunk native vlan 2

Configure Access Ports

  • We have only one access port
FAC1-BLD1-FL2(config)#interface FastEthernet 1/0
FAC1-BLD1-FL2(config-if)#switchport mode access
FAC1-BLD1-FL2(config-if)#switchport access vlan 20
FAC1-BLD1-FL2(config-if)#description link to PC3

Make sure to save your setting with FAC1-BLD1-FL2#write

Configuring the rest L2 network

Following configuration are already done in Ethernet switches in the Network file.

e0 Access 10
e7 dot1q

e0 Access 20
e7 dot1q 2

e0 Access 20
e1 Access 30
e7 dot1q 2

e0 Access 60
e1 Access 70
e7 dot1q 3

e0 Access 70
e6 dot1q 3
e7 dot1q 3

e0 Access 80
e7 dot1q 3

e0 Access 1
e1 Access 1
e7 Access 1

Configure End Devices

Configure PC's

  • First you have to run the VPC simulator (vpcs_0.6_Win32.exe) which is inside the VPC Files folder inside the WKFiles folder.

  • You will get 9 VPCs with VPC simulator
  • use ? to get the help
  • You can navigate form one PC to another by typing the numbers from 1 to 9.

  • Enter following commands under PC-1,
    PC-1> ip 10.XY.10.1 24 10.XY.10.254
    PC-1> ip dns 10.XY.0.1
    PC-1> ip 2401:DD00:20XY:1110::1/64 2401:DD00:20XY:1110::ffff
    PC-1> save
  • For troubleshooting and configuration verification, we can use:
    PC-1> show ip
    PC-1> show ipv6
  • Based on the following table configure all other end-user PC's just as above. You may need to change IP addresses.
Host Devices IPv4 IPv6
PC-1 10.XY.10.1 2401:DD00:20XY:1110::1/64
PC-2 10.XY.20.1 2401:DD00:20XY:1120::1/64
PC-3 10.XY.20.2 2401:DD00:20XY:1120::2/64
PC-4 10.XY.20.3 2401:DD00:20XY:1120::3/64
PC-5 10.XY.30.1 2401:DD00:20XY:1230::1/64
PC-6 10.XY.60.1 2401:DD00:20XY:2160::1/64
PC-7 10.XY.70.1 2401:DD00:20XY:2270::1/64
PC-8 10.XY.70.2 2401:DD00:20XY:2270::2/64
PC-9 10.XY.80.1 2401:DD00:20XY:2280::1/64
Monitoring-Server 10.XY.5.10 2401:DD00:20XY:5::AAAA/64
Web-Server 2401:DD00:20XY:1::PQRW/64
  • Switch on Monitoring-Server (Username : user , Password: 1234) and Web-Server. Log-in as user wsuser with the class password: CNBP2019@LEARN
    • Edit the following file to insert ip details according to the above table.
      sudo vi /etc/netplan/00-installer-config.yaml	
    • Edit details as follows on Monitoring Server
      # This file describes the network interfaces available on your system
      # For more information, see netplan(5).
                  - 10.XY.5.10/24
                  - 2401:dd00:20XY:5::AAAA/64
                  dhcp4: false
                  dhcp6: false
                  gateway4: 10.XY.5.254
                  gateway6: 2401:dd00:20XY:5::FFFF
                      addresses: [,]
                      - 2401:dd00:20XY:1::FFFF
          version: 2
    • Restart servers.
      sudo init 6

    You need to modify the above settings to suit the IP detail when applying to the webserver

  • Test end-user connectivity using ping command on each.

Some commands to check your setup

  • Check VLAN Setup
    FAC1#show vlan-switch
  • Check IP address details
    FAC1#show ip interface brief
    FAC1#show ipv6 interface brief
  • Check OSPF details
    FAC1#show ip ospf
    FAC1#show ipv6 ospf
  • Check IP routing details
    FAC1#show ip route
    FAC1#show ipv6 route
  • Check Interface details
    FAC1#show interface switchport
  • Check all config
    FAC1#show run
Last modified 4 weeks ago Last modified on Apr 27, 2022, 10:02:05 AM

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