NASA Lab #4

Cisco Switch Basics

Before Start

Download Lab materials

including:

1. Cisco Packet Tracer

2. inclass.pka

Connecting to a Switch

1. console port

a) Used when setting up the switch for the first time

b) Used when applying changes to the switch that will result in disconnection of the Internet

Connecting to a Switch

2. VTY(Telent/SSH)

Most often used method after setting up the switch

How to set up SSH on a Cisco Switch

Connecting to a Switch

3. HTTP/HTTPS

Allow Web GUI to be used, but rarely used

How to enable HTTPS on a Cisco Switch

Command Line Modes

User Mode (Can only view limited info)

Switch>

Privileged mode (Can view various info)

Switch> enable
Switch#

Configuration mode (Can modify config)

Switch# configure terminal
Switch(config)#

Command Line Basics

Auto complete: <TAB>

Switch# show ru<TAB>
Switch# show running-config

List of available commands

Switch#show r?
radius          redundancy  region     registry
reload          rep         resource   rhosts
rib             rif         rmon       rom-monitor
romvar          route-map   route-tag  rpl
running-config

Command Line Basics

Unique prefix

Switch# sh run

Switch# show running-config

Switch> ena

Switch> enable

Switch# conf t

Switch# configure terminal

Command Line Basics

Output modifier

<command> | include <expr>

<command> | exclude <expr>

output lines that contain <expr>

output lines without <expr>

Command Line Basics

Interfaces

```
FastEthernet0/1 or Fa0/1
```
```
GigabitEthernet1/0/2 or Gi1/0/2
```
```
Port-channel1 or Po1
```
```
Vlan543 or Vl543
```

Command Line Basics

useful info

show running-config : running configuration

show interfaces : details of all interfaces

show interfaces Fa0/1 : details of a specified interface

show interfaces status : interface status

```
show vlan : VLANs in VLAN database
```

show mac address-table : MAC address/port mapping

```
show arp : ARP table
```

show version : hardware/software information

```
show ?
```

Configuration

Switch# conf t

enter configuration mode

Global Configuration

Switch(config)# hostname NASA
NASA(config)#

hostname <name> : set the host name

enable password / enable secret : set password

Switch(config)# enable password PASSWORD
Switch(config)# enable secret 0 PASSWORD
Switch(config)# do show running-config | include enable
enable password PASSWORD
enable secret 5 $1$mERr$cP1uxB/ASHbnPQTLzT8H10

service password-encryption : encrypt password

Switch(config)#enable password PASSWORD
Switch(config)#service password-encryption
Switch(config)#do show running-config | include enable
enable password 7 08116D7D3A2E2A2536

Use "enable secret" instead of "enable password"

Interface Configuration

Choose an interface to configure

Switch(config)# int fa0/1
Switch(config-if)#

Set port as access port

Switch(config-if)# switchport mode access
Switch(config-if)# switchport access vlan 777

Set port as trunk port

Switch(config-if)# switchport mode trunk
Switch(config-if)# switchport allowed vlan 777-888,999

A switch port is either a access port or a trunk port

VLAN configuration

Configure VLAN

Switch(config)# vlan 777
Switch(config-vlan)# show ?

Configure VLAN interface

Switch(config)# int vlan 777
Switch(config-if)# show ?

Set IP on VLAN interface

Switch(config-if)# ip address 192.168.77.1 255.255.255.0

vlan v.s. int vlan

VLAN	VLAN interface
virtual LAN	a virtual interface in VLAN
allow multiple LANs to exist on a single switch	can be used for inter-vlan routing
a network	an interface

Port Channel

Create a port channel

Switch(config)# int port-channel 1
Switch(config-if)#

Set interfaces to be members

Switch(config)# int range fa0/1-2
Switch(config-if)# channel-group 1 mode active
Switch(config-if)# exit

Port Channel

Will a port channel form?

LACP

PAgP

	active	passive
active	Yes	Yes
passive	Yes	No

	desirable	auto
desirable	Yes	Yes
auto	Yes	No

Line Configuration

Choose line

Switch(config)# line vty 0 4
Switch(config-line)#

Enable login

Switch(config-line)# login

Set password

Switch(config-line)# password PASSWORD

Save Configuration

Switch# copy running-config startup-config

Switch# write memory

Switch# wr

Three methods to choose from

Remember to save config before exiting!!

Tip

Switch(config)# no shutdown

After configuring an interface, if the config does not take effect, check if the interface is shut down

Make sure an interface is not shut down

Excercise

Cisco Packet Tracer

Lab material (Link)
Choose your OS and download corresponding Cisco Packet Tracer (Windows/Mac/Linux)
Install packet tracer (.exe/.dmg/.deb)

Cisco Packet Tracer

Execute "PacketTracer7"
"User Login" with account/password provided in the link
Open "inclass.pka"

Cisco Packet Tracer

Make RD-1 & RD-2 under VLAN100
Make SP-1 & SP-2 under VLAN200
Servers in the same VLAN should be able to ping each other
Setup link aggregation between the two switches

Cisco Packet Tracer

trunk VLAN 100,200

Cisco Packet Tracer

Click "CLI" on switch windows to configure settings.

Cisco Packet Tracer

Use "Check results" on the "PT Activity" window to check your goals.

NASA Lab #4

Before Start

Download Lab materials

Connecting to a Switch

1. console port

Connecting to a Switch

2. VTY(Telent/SSH)

Connecting to a Switch

3. HTTP/HTTPS

Command Line Modes

Command Line Basics

Command Line Basics

Command Line Basics

Command Line Basics

Command Line Basics

Configuration

Global Configuration

Interface Configuration

VLAN configuration

vlan v.s. int vlan

Port Channel

Port Channel

Line Configuration

Save Configuration

Tip

Excercise

Cisco Packet Tracer

Cisco Packet Tracer

Cisco Packet Tracer

Cisco Packet Tracer

Cisco Packet Tracer

Cisco Packet Tracer

Cisco Packet Tracer

NASA Lab #4 Cisco Switch Basics

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