1 Version 3.0 Module 6 Switch Configuration

2 Version 3.0 Switches Contain: –CPU –RAM –Operating System

3 Version 3.0 LED Indicators Default setting

4 Version 3.0 POST Test & Initial boot Up, and Help Console into a switch with the same cable used to console into a router Use same settings in Hyperterminal Context sensitive help is available from the command line – using the question mark as you would in router help.

5 Version 3.0 Catalyst IOS Intro User EXEC mode and Privileged EXEC mode. –enable command. IOS based switch is just like the router IOS. –configure command – go to global config mode. –copy run start – to save config to NVRAM. Host Name configuration characters –hostname [name] Comment to help identify the interface. –description [description-string] - interface config. mode –Use quotes when using spaces in string. IOS-based: same as on a router. –access help by entering ?

6 Version 3.0 Default Configuration When powered up w/out configuration, the default name is Switch. No passwords have been configured. All switch ports are part of VLAN 1 Switch has no IP address Show version shows the IOS version and the configuration register.

7 Version 3.0 Actual Configuration First, –Remove any VLAN info (delete flash: vlan.dat) –Erase startup –Reload Follow router configuration method to configure hostname, line passwords, set a default gateway, etc. Set IP address for management VLAN1 for telnet access. Fast Ethernet ports default to auto-speed and auto- duplex, or they can be set manually. Management of a switch can also be done using a GUI interface as long as HTTP service is turned on.

8 Version 3.0 Remote Access to Switch To telnet, ping, or globally manage the switch: –Enter an IP address and management VLAN. Configuration –interface vlan 1 –ip address [address][mask] –ip default-gateway [address] –Verify with show ip interface

9 Version 3.0 Defining port speed / duplex Speed: –Interface config mode: –speed [10 | 100 | auto] Line mode is either full duplex or half duplex. –Interface config mode: –duplex [auto | full | half] –auto option only for fixed Fast Ethernet TX ports.

10 Version 3.0 Backup on TFTP Server IOS-based commands: –copy run tftp – to save config file to tftp server. –copy tftp run – to download config from tftp server to active config and to NVRAM.

11 Version 3.0 VLAN Configuration Entering VLAN Database –Switch#vlan database –Switch(vlan)# Adding VLANs –Switch(vlan)#vlan 15 name Accounting Deleting VLAN database –Switch#delete flash:vlan.dat Assigning ports to a VLAN –Switch(config)#interface FastEthernet 0/12 –Switch(config-if)#switchport access vlan 15 Verify VLAN Configuration –Switch#show vlan

12 Version 3.0 MAC Address Table Switches learn the MAC addresses of workstations that are connected to their switch ports by examining the source address of frames that are received on that port – then they are placed in a MAC table. If no frames are seen with a previously learned address, the MAC address entry is automatically discarded or aged out after 300 seconds.

13 Version 3.0 Static MAC addresses If entered by an admin, it will be permanent and not age out or be cleared out by powering down the switch. The node has to be attached to the switch.

14 Version 3.0 Port Security Anyone can plug in if they are in the open Port security can be set on an interface – so that, for instance, the number of MAC addresses that can be learned on any one interface could be 1. Port security can be verified with: Show port security Note commands available

15 Version 3.0 Adding a Switch

16 Version 3.0 MAC Addresses

17 Version 3.0 Password Recovery On a Cisco Catalyst 2900, hold down the MODE button during switch startup to begin the process. Instructions attached for Password Recovery on a Cisco 1900 Catalyst Switch.

18 Version 3.0 Module 6 Switch Configuration