Monday, June 23, 2008

Quickly Lock Your Computer and Use Other Windows Logo Shortcut Keys

Press To
Windows logo keyDisplay or hide the Start menu
Windows logo key+LLock the computer
Windows logo key+BREAKDisplay the System Properties dialog box
Windows logo key+DShow the desktop
Windows logo key+MMinimize all windows
Windows logo key+SHIFT+MRestore minimized windows
Windows logo key+EOpen My Computer
Windows logo key+FSearch for a file or folder
CTRL+Windows logo key+FSearch for computers
Windows logo key+F1Display Windows Help
Windows logo key+ROpen the Run dialog box
Windows logo key+UOpen Utility Manager


APPLIES TO
Microsoft Windows XP Home Edition
Microsoft Windows XP Professional

Sunday, June 22, 2008

Spanning Tree Protocol Verification

Spanning-Tree Verification

Cisco IOS Software Release 12.0

2900#show spanning-tree brief

Displays the spanning-tree table of the switch

Cisco IOS Software Release 12.1

Switch#show spanning-tree

Displays the spanning-tree table of the switch


2950#show spanning-tree int fa 0/17

Displays spanning-tree info for port fa 0/17


2950#show spanning-tree vlan x

Displays spanning-tree info for the specific VLAN


2950#debug spanning-tree {all}

Displays all informational messages about changes in the spanning-tree topology


Wednesday, June 18, 2008

Setting IP Address and Default Gateway on a Cisco Switch

Setting IP Address and Default Gateway

1900 Series Switch

1900Switch(config)#ip address 172.16.10.2 255.255.255.0

Sets the IP address and mask to allow for remote access to the switch

1900Switch(config)#ip default-gateway 172.16.10.1

Sets the default gateway address to allow IP information an exit past the local network

1900Switch(config)#


2900/2950 Series Switch

2900Switch(config)#int vlan1

Enters virtual interface for VLAN 1, the default VLAN on the switch

2900Switch(config-if)#ip address 172.16.10.2 255.255.255.0

Sets the IP address and mask to allow for remote access to the switch

2900Switch(config-if)#exit

2900Switch(config)#ip default-gateway 172.16.10.1

To allow IP information an exit past the local network


Tip:

For the 2900/2950 series switches, the IP address of the switch is just thatthe IP address for the entire switch. That is why you set the address in VLAN 1the default VLAN of the switchand not in a specific Ethernet interface.

Friday, June 13, 2008

Password Recovery on a Cisco Switch

Procedure for performing a password recovery on a Cisco 2950 switch (and probably other models, as well).

1. Unplug the power cable

2. Hold down the mode button while replugging the power cable

3. Type flash_init over the console

4. Type load_helper

5. Type Dir flash :
//make sure to type the semi-colons

6. Type rename flash:config.txt flash:config.old
//the password is contained in the config.txt file

7. Type boot
//this reboots the system

8. Type n to skip the initial setup configuration

9. Type enable
//this takes you to the enable mode

10. Type rename flash:config.old flash:config.txt

11. Save config.txt to system
#copy flash:config.txt system:running-config

12. Enter config mode and change the password
# config t
# no enable secret
//this applies only if the enable secret password was created

13. Finally, write the changes to memory
# write memory

Tuesday, June 10, 2008

Install XWindows and Gnome on CentOS with YUM

To install XWindows and Gnome on CentOS using YUM;

# yum groupinstall “X Window System” “GNOME Desktop Environment”

Sunday, June 8, 2008

Managing the MAC Address Table

Managing the MAC Address Table: 1900 and 2900/2950 Series Switches

switch#show mac-address-table

Displays current MAC address forwarding table

switch#clear mac-address-table

Deletes all entries from current MAC address forwarding table

switch#clear mac-address-table dynamic

Deletes only dynamic entries from table


Thursday, June 5, 2008

Setting Web-Based Interface for Configuration

Setting Web-Based Interface for Configuration: 1900 and 2900/2950 Series Switches

X900Switch(config)#ip http server

Turns on HTTP service

X900Switch(config)#ip http port 80

Sets port number for HTTP. This port should be turned off for security reasons unless it is being used