- Switch Configuration Commands
- Switch Configuration Tutorial Pdf
- Optilink Switch Configuration Pdf
- Switch Configuration Pdf
Title: Basic switch configuration Author: Thomas Ivarsson Last edit: February 28, 2012 Basic switch configuration Cisco IOS Basic switch functions, names and passwords The switch name is tool to let us see what device we are connected to. The prompt will display the name of the switch so SW1 tells us that we are connected to a switch named 'SW1'.
In my opinion, the Cisco switches are the best in the market. Versatile, reliable, flexible and powerful, the Cisco switch product line (such as the 2960, 3560, 3650, 3850, 4500, 6500, 9400 series etc) offer unparalleled performance and features.
Although a Cisco switch is a much simpler network device compared with other devices (such as routers and firewalls for example), many people have difficulties to configure a Cisco Catalyst Switch.
Unlike other lower class switch vendors (which are plug-and-play), the Cisco switch needs some initial basic configuration in order to enable management, security and some other important features.
In this article I will describe the basic steps needed to configure and setup a Cisco switch from scratch. I don’t like graphical GUI or web management at all, so I will show you command line configuration (CLI) which is much more powerful and makes the administrators learn what they are doing on the device.
STEP1:Connect to the device via console
Use a terminal emulation software such as PuTTY and connect to the console of the switch. You will get the initial command prompt “Switch>”
Type “enable” and hit enter. You will get into privileged mode (“Switch#”)
Now, get into Global Configuration Mode:
Switch# configure terminal
Switch(config)#
STEP2: Set up a hostname for the particular switch to distinguish it in the network
Switch(config)# hostname access-switch1
access-switch1(config)#
Switch Configuration Commands
STEP3: Configure an administration password (enable secret password)
access-switch1(config)# enable secret somestrongpass
STEP4: Configure a password for Telnet access
access-switch1(config)# line vty 0 15
access-switch1(config-line)# password strongtelnetpass
access-switch1(config-line)# login
access-switch1(config-line)# exit
access-switch1(config)#
STEP5: Define which IP addresses are allowed to access the switch via Telnet
access-switch1(config)# ip access-list standard TELNET-ACCESS
access-switch1(config-std-nacl)# permit 10.1.1.100
access-switch1(config-std-nacl)# permit 10.1.1.101
access-switch1(config-std-nacl)# exit
!Apply the access list to Telnet VTY Lines
access-switch1(config)# line vty 0 15
access-switch1(config-line)# access-class TELNET-ACCESS in
access-switch1(config-line)# exit
access-switch1(config)#
STEP6: Assign IP address to the switch for management
!Management IP is assigned to Vlan 1 by default
access-switch1(config)# interface vlan 1
access-switch1(config-if)# ip address 10.1.1.200 255.255.255.0
access-switch1(config-if)# exit
access-switch1(config)#
STEP7: Assign default gateway to the switch
access-switch1(config)# ip default-gateway 10.1.1.254
STEP8: Disable unneeded ports on the switch
! This step is optional but enhances security
! Assume that we have a 48-port switch and we don’t need ports 25 to 48
access-switch1(config)# interface range fe 0/25-48
access-switch1(config-if-range)# shutdown
access-switch1(config-if-range)# exit
access-switch1(config)#
STEP9: Configure Layer2 VLANs and assign ports to the them
By default, all physical ports of the switch belong to the native VLAN1. One of the most important functions of an Ethernet switch is to segment the network into multiple Layer2 VLANs (with each VLAN belonging to a different Layer3 subnet).
In order to do the above Layer2 segmentation you need to create additional VLANs from the default VLAN1 and then assign physical ports to these new vlans. Let’s create two new vlans (VLAN2 and VLAN3) and assign two ports to each one.
! First create the Layer2 VLANs on the switch
access-switch1(config)# vlan 2
access-switch1(config-vlan)# name TEACHERS
access-switch1(config-vlan)# exit
Switch Configuration Tutorial Pdf
access-switch1(config)# vlan 3
access-switch1(config-vlan)# name STUDENTS
access-switch1(config-vlan)# exit
! Now assign the physical ports to each VLAN. Ports 1-2 are assigned to VLAN2 and ports 3-4 to VLAN3
access-switch1(config)# interface range fe 0/1-2
access-switch1(config-if-range)# switchport mode access
access-switch1(config-if-range)# switchport access vlan 2
access-switch1(config-if-range)# exit
access-switch1(config)# interface range fe 0/3-4
access-switch1(config-if-range)# switchport mode access
access-switch1(config-if-range)# switchport access vlan 3
access-switch1(config-if-range)# exit
Optilink Switch Configuration Pdf
STEP10: Save the configuration
access-switch1(config)# wr
The above command to save the configuration can also be accomplished with copy run start
The above are some steps that can be followed for basic set-up of a Cisco switch. Of course there are more things you can configure (such as SNMP servers, NTP, AAA, 802.1q Trunk ports etc) but those depend on the requirements of each particular network.