Chapter Nine

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VLAN

This chapter will walk you through the commands and information about the display of VLAN info, the creation of static VLANs, the assigning of the ports to the VLANs, and the assigning of the ports by using the range command.

Displaying VLANs

• The command AustinSwitch#show vlan will allow you to see the information about VLAN.
• The command AustinSwitch#show vlan-membership will allow you to see the information about VLAN ports.
• The command AustinSwitch#show vlan 2 will allow you to see the information about VLAN 2.

For 2900/2950 series:

• The command AustinSwitch#show vlan will allow you to see the information about VLAN status.
• The command AustinSwitch#show vlan brief will allow you to see the summarized information about VLAN.
• The command AustinSwitch#show vlan id 2 will allow you to see the information about VLAN 2 only
• The command AustinSwitch#show vlan name Mark will allow you to see the information about VLAN that is named Mark.

Static VLANs

• The command AustinSwitch#config t will allow you to start the configuration mode.
• The command AustinSwitch(config)#vlan 2 name John will allow you to create the VLAN 2 named John.
• The command AustinSwitch(config)#vlan 3 name John1 will allow you to create the VLAN 3 named John1.

For 2900 Series Switch:

• The command AustinSwitch#vlan database will allow you to enter the database mode.
• The command AustinSwitch(config)#vlan 2 name John will allow you to create the VLAN 2 named John.
• The command AustinSwitch(config)#vlan 3 name John1 will allow you to create the VLAN 3 named John1.
• The command AustinSwitch(vlan)#exit will allow you to apply the changes and then exit VLAN database mode.

For 2950 Series:

• The command AustinSwitch#config t will allow you to start the configuration mode.
• The command AustinSwitch(config)#vlan 10 will allow you to create VLAN 10. Also, you will enter the configuration mode for VLAN to have further definitions.
• The command AustinSwitch(config-vlan)#name John1 will allow you to name the vlan John1.
• The command AustinSwitch(config-vlan)#exit will allow you to exit and switch back to the global configuration mode.
• The command AustinSwitch(config)#vlan 20 will allow you to create VLAN 20. Also, you will enter the configuration mode for VLAN to have further definitions.
• The command AustinSwitch(config-vlan)#name John5 will allow you to name the vlan John5.
• The command AustinSwitch(config-vlan)#exit will allow you to exit and switch back to the global configuration mode.

Port Assigning to VLANS

• The command AustinSwitch#config t will allow you to start the configuration mode.
• The command AustinSwitch(config)#int e0/2 will allow you to shift to the interface mode.
• The command AustinSwitch(config-if)#vlan static 2 will allow you to assign the port to VLAN 2.
• The command AustinSwitch(config)#int e0/3 will allow you to shift to the interface mode.
• The command AustinSwitch(config-if)#vlan static 3 will allow you to assign the port to VLAN 3.
• The command AustinSwitch(config-if)#exit will allow you to exit the interface mode.
• At the end you will see the following: AustinSwitch(config-if)#.

For 2900/2950 Series:

• The command AustinSwitch#config t will allow you to start the configuration mode.
• The command AustinSwitch(config)#int fa0/2 will allow you to shift to the interface mode.
• The command AustinSwitch(config-if)#switchport mode access will allow you to turn the switchport mode to access.
• The command AustinSwitch(config-if)#switchport access vlan 2 will allow you to assign the port to VLAN 2.
• The command AustinSwitch(config)#int fa0/3 will allow you to shift to the interface mode.
• The command AustinSwitch(config-if)#switchport mode access will allow you to turn the switchport mode to access.
• The command AustinSwitch(config-if)#switchport access vlan 3 will allow you to assign the port to VLAN 3.
• The command AustinSwitch(config-if)#exit will allow you to exit the interface mode.
• At the end you will see the following: AustinSwitch(config-if)#.

Saving VLAN Configurations

• The command AustinSwitch#copy run start will allow you to save the running-config the NVRAM.

Erasing VLAN Configurations

• The command AustinSwitch#delete vtp will allow you to erase the VLAN information from switch and it also resets the VTP parameters to the default factory settings.

You also can use the following commands.

• The command AustinSwitch(config)#inf fa 0/2 will allow you to start the interface mode.
• The command AustinSwitch(config-if)#no vlan static 2 will allow you to erase the interface from VLAN2 and then places it back in the default VLAN 1.
• The command AustinSwitch(config-if)#exit will allow you to exit the interface mode.
• The command AustinSwitch(config-if)#no vlan 2 name John1 will allow you only to erase VLAN2 from the system's database.
• At the end you will see the following: AustinSwitch(config-if)#.

For 2900 series:

• The command AustinSwitch#config t will allow you to start the configuration mode.
• The command AustinSwitch(config)#inf fa 0/3 will allow you to start the interface mode.
• The command AustinSwitch(config-if)#no switchport access vlan 3 will allow you to erase the port from VLAN 3 and then places it back in the default VLAN 1.
• The command AustinSwitch(config-if)#exit will allow you to exit the interface mode.
• The command AustinSwitch(config)#exit will allow you to exit.
• The command AustinSwitch#vlan database will allow you to enter only the VLAN database of the system.
• The command AustinSwitch(vlan)#no vlan 3 will allow you only to erase VLAN 3 from the system's database.
• The command AustinSwitch(vlan)#exit will allow you to apply the changes and then exit the database mode.

Troubleshooting Process

• The command AustinSwitch#show vlan will allow you to see the information about the full VLAN database.
• The command AustinSwitch#show vlan brief will allow you to see the information about the database in a summarized manner.
• The command AustinSwitch#show vlan interfaces will allow you to see the information about the interfaces. This includes the information about the duplex settings and the speed as well.
• The command AustinSwitch#debug sw-vlan packets will allow you to see the information about the VLAN packets that a router received but it cannot support it.

VLAN Configuration Process

• The command switch>en will allow you to enter the privileged mode.
• The command switch#config t will allow you to enter the mode of global configuration.
• The command switch(config)# hostname AustinSwitch will allow you to set up the name for the host.
• The command AustinSwitch(config)#no ip domain-lookup will allow you to switch off the DNS entries checking on spelling mistakes.
• The command AustinSwitch(config)#enable secret jasmine will allow you to set up the secret password to jasmine.
• The command AustinSwitch(config)#line con 0 will allow you to enter the console mode.
• The command AustinSwitch(config-line)#logging synchronous will ensure that the informational lines do not meddle with the command that you have entered. 
• The command AustinSwitch(config-line)#password john1 will allow you to set up the password to john1.
• The command AustinSwitch(config-line)#exit will allow you to get back t the global configuration mode.
• The command AustinSwitch(config)#line vty 0 15 will allow you to enter the 16 vty modes. You will the same commands being applied to all lines.
• The command AustinSwitch(config-line)#login synchronous will allow you to challenge remote users to enter a password.
• The command AustinSwitch(config-line)#password john1 will allow you to set up the password to john1.
• The command AustinSwitch(config-line)#exit will allow you to get back t the global configuration mode.
• The command AustinSwitch(config)#ip default-gateway 192.168.1.1 will allow you to set up the switch's default gateway.
• The command AustinSwitch(config)#int vlan1 will allow you to enter the virtual interface VLAN1.
• The command AustinSwitch(config-if)#ip address 192.168.1.2 255.255.255.0 will allow you to set up your switch's IP address.
• The command AustinSwitch(config-if)#no shut will allow you to switch on the interface you are working in.
• The command AustinSwitch(config-if)#exit will allow you to get back to the global configuration mode.
• The command AustinSwitch#vlan database will allow you to enter into the VLAN database.
• The command AustinSwitch(vlan)# 10 name Rose will allow you to create VLAN 10.
• The command AustinSwitch(vlan)# 20 name Rosemary will allow you to create VLAN 20.
• The command AustinSwitch(vlan)# 30 name Jasmine will allow you to create VLAN 30.
• The command AustinSwitch(vlan)#exit will allow you to apply the information you have entered and exit the system.
• The command Austinswitch#config t will allow you to enter the mode of global configuration.
• The command Austinswitch(config)#int fa0/2 will allow you to switch back to the interface mode.
• The command Austinswitch(config-if)#switchport mode access will allow you to set up the switchport mode to give access.
• The command Austinswitch(config-if)#switchport access vlan 10 will allow you to assign the port to VLAN 10.
• The command Austinswitch(config)#int fa0/3 will allow you to switch back to the interface mode.
• The command Austinswitch(config-if)#switchport mode access will allow you to set up the switchport mode to give access.
• The command Austinswitch(config-if)#switchport access vlan 10 will allow you to assign the port to VLAN 10.
• The command Austinswitch(config)#int fa0/4 will allow you to switch back to the interface mode.
• The command Austinswitch(config-if)#switchport mode access will allow you to set up the switchport mode to give access.
• The command Austinswitch(config-if)#switchport access vlan 10 will allow you to assign the port to VLAN 10.
• The command Austinswitch(config)#int fa0/5 will allow you to switch back to the interface mode.
• The command Austinswitch(config-if)#switchport mode access will allow you to set up the switchport mode to give access.
• The command Austinswitch(config-if)#switchport access vlan 20 will allow you to assign the port to VLAN 20.
• The command Austinswitch(config)#int fa0/6 will allow you to switch back to the interface mode.
• The command Austinswitch(config-if)#switchport mode access will allow you to set up the switchport mode to give access.
• The command Austinswitch(config-if)#switchport access vlan 20 will allow you to assign the port to VLAN 20.
• The command Austinswitch(config)#int fa0/7 will allow you to switch back to the interface mode.
• The command Austinswitch(config-if)#switchport mode access will allow you to set up the switchport mode to give access.
• The command Austinswitch(config-if)#switchport access vlan 20 will allow you to assign the port to VLAN 20.
• The command Austinswitch(config)#int fa0/8 will allow you to switch back to the interface mode.
• The command Austinswitch(config-if)#switchport mode access will allow you to set up the switchport mode to give access.
• The command Austinswitch(config-if)#switchport access vlan 10 will allow you to assign the port to VLAN 10.
• The command Austinswitch(config)#int fa0/9 will allow you to switch back to the interface mode.
• The command Austinswitch(config-if)#switchport mode access will allow you to set up the switchport mode to give access.
• The command Austinswitch(config-if)#switchport access vlan 30 will allow you to assign the port to VLAN 30.
• The command Austinswitch(config)#int fa0/10 will allow you to switch back to the interface mode.
• The command Austinswitch(config-if)#switchport mode access will allow you to set up the switchport mode to give access.
• The command Austinswitch(config-if)#switchport access vlan 30 will allow you to assign the port to VLAN 30.
• The command Austinswitch(config)#int fa0/11 will allow you to switch back to the interface mode.
• The command Austinswitch(config-if)#switchport mode access will allow you to set up the switchport mode to give access.
• The command Austinswitch(config-if)#switchport access vlan 30 will allow you to assign the port to VLAN 30.
• The command Austinswitch(config)#int fa0/12 will allow you to switch back to the interface mode.
• The command Austinswitch(config-if)#switchport mode access will allow you to set up the switchport mode to give access.
• The command Austinswitch(config-if)#switchport access vlan 30 will allow you to assign the port to VLAN 30.
• The command Austinswitch(config)#(enter the following keys on the keyboard: ctrl + z) will allow you to get back to the privileged mode.
• The command Austinswitch#copy run start will allow you to save the settings to NVRAM.
• VTP Configuration
  For 1900 series:
  • The command Austinswitch1900(config)#vtp client will allow you to turn the switch to the mode namely VTP client.
  • The command Austinswitch1900(config)#vtp server will allow you to turn the switch to mode namely default VTP server.
  • The command Austinswitch1900(config)#vtp transparent  will allow you to turn the switch to the mode namely VTP transparent.
  • The command Austinswitch1900(config)#vtp domain SNAP will allow you to change the domain from the default to CNAP.
  • The command Austinswitch1900(config)#vtp password john will allow you to change the password.
  For 2900 series:
  • The command Austinswitch2900#vlan database will allow you to initiate the mode namely VLAN database.
  • The command Austinswitch2900(vlan)#vtp client will allow you to turn the switch to mode namely client.
  • The command Austinswitch2900(vlan)#vtp server will allow you to turn the switch to mode namely server.
  • The command Austinswitch2900(vlan)#vtp transparent  will allow you to turn the switch to the mode namely VTP transparent.
  • The command Austinswitch2900(vlan)#vtp domain academy will allow you to change the domain to academy.
  • The command Austinswitch2900(vlan)#vtp password john1 will allow you to change the password to john1.
  • The command Austinswitch2900(vlan)#vtp v2-mode will allow you to turn the switch to the mode namely version 2 or v2.
  • The command Austinswitch2900(vlan)#vtp pruning will allow you to turn on VTP pruning.
  • The command Austinswitch2900(vlan)#vtp transparent  will allow you to turn the switch to the mode namely VTP transparent.
  • The command Austinswitch2900(vlan)#exit will allow you to implement the changes and then exit the mode.
  For 2950 series
  • The command Austinswitch2950#config t will allow you to enter the global configuration mode.
  • The command Austinswitch2950(config)#vtp mode client will allow you to turn the switch to the mode namely VTP client.
  • The command Austinswitch2950(config)#vtp server will allow you to turn the switch to mode namely default VTP server.
  • The command Austinswitch2950(config)#vtp mode transparent will allow you to turn the switch to the mode namely VTP transparent.
  • The command Austinswitch2950(config)#vtp domain academy will allow you to change the domain from the default to academy.
  • The command Austinswitch2950(config)#vtp password john will allow you to change the password to john.
  • The command Austinswitch2950(config)#vtp v2-mode will allow you to turn the switch to the mode namely version 2 or v2.
  • The command Austinswitch2950(condig)#vtp pruning will allow you to turn on VTP pruning.
  Configuration for 2900 Series
  • The command switch>en will allow you to enter the privileged mode.
  • The command switch>config t will allow you to enter the configuration mode.
  • The command switch(config)#hostname AustinSwitch2900 will allow you to set up the host name.
  • The command AustinSwitch2900(config)#no ip domain-lookup will allow you to turn off the DNS resolution to avoid the waiting time to the DNS lookup for the spelling errors.
  • The command AustinSwitch2900(config)#line con 0 will allow you to enter the line mode.
  • The command AustinSwitch2900(config-line)#logging synchronous will allow you to append the command line to a new line. There will be no interruption from the information items.
  • The command AustinSwitch2900(config-line)#exec-timeout 0 0 will allow you to stop the console session from getting timed out.
  • The command AustinSwitch2900(config-line)#exit will allow you to line mode.
  • The command AustinSwitch2900(config)#enable secret john will allow you to set up the secret password to the word john.
  • The command AustinSwitch2900(config)#exit will allow you to exit the session.
  • The command AustinSwitch2900#vlan database will allow you to enter the database mode.
  • The command AustinSwitch2900(vlan)#vlan 10 name Rose will allow you to create a VLAN 10 named Rose.
  • The command AustinSwitch2900(vlan)#vlan 20 name Rose1 will allow you to create a VLAN 10 named Rose1.
  • The command AustinSwitch2900(vlan)#vlan 30 name Rose2 will allow you to create a VLAN 10 named Rose2.
  • The command AustinSwitch2900(vlan)#vtp server will allow you to turn your switch into the VTP server.
  • The command AustinSwitch2900(vlan)#vtp domain academy will allow you to assign the domain name academy to the server.
  • The command AustinSwitch2900(vlan)#exit will allow you to exit the VTP server mode after applying all the system's necessary changes.
  • The command AustinSwitch2900#config t will allow you to enter the configuration mode once again.
  • The command AustinSwitch2900(config)#int vlan1 will allow you to initiate vlan1.
  • The command AustinSwitch2900(config-if)#ip add (enter ip address here) will allow you to enter and add the ip address to the network.
  • The command AustinSwitch2900(config-if)#no shutdown is the next command on the line.
  • The last command is AustinSwitch2900(config-if)#exit. It will exit the configuration mode.
  • The command AustinSwitch2900(config)#ip default-gateway 192.168.1.1 will allow you to set the ip default-gateway.
  • The command AustinSwitch2900(config)#int fa 0/1 will allow you to initiate the interface.
  • The command AustinSwitch2900(config-if)#desc Trunk Link to Corp Router will allow you to link the system to the CORP router.
  • The command AustinSwitch2900(config-if)#switchport mode trunk will allow you to create trunk link.
  • The command AustinSwitch2900(config-if)#switchport trunk encapsulation dotiq will allow you to set up the encapsulation to the DotIQ.
  • The command AustinSwitch2900(config-if)#int fa 0/2 will allow you to initiate the interface.
  • The command AustinSwitch2900(config-if)#switchport access vlan 10 will allow you to assign VLAN 10 a separate port.
  • The command AustinSwitch2900(config-if)#spanning-tree portfast will allow you to transition the port to the forwarding state inside the Spanning Tree Protocol (STP).
  • The command AustinSwitch2900(config-if)#int fa 0/3 will allow you to initiate the interface.
  • The command AustinSwitch2900(config-if)#switchport access vlan 10 will allow you to assign VLAN 10 a separate port.
  • The command AustinSwitch2900(config-if)#spanning-tree portfast will allow you to transition the port to the forwarding state inside the Spanning Tree Protocol (STP).
  • The command AustinSwitch2900(config-if)#int fa 0/4 will allow you to initiate the interface.
  • The command AustinSwitch2900(config-if)#switchport access vlan 10 will allow you to assign VLAN 10 a separate port.
  • The command AustinSwitch2900(config-if)#spanning-tree portfast will allow you to transition the port to the forwarding state inside the Spanning Tree Protocol (STP).
  • The command AustinSwitch2900(config-if)#int fa 0/5 will allow you to initiate the interface.
  • The command AustinSwitch2900(config-if)#switchport access vlan 20 will allow you to assign VLAN 20 a separate port.
  • The command AustinSwitch2900(config-if)#spanning-tree portfast will allow you to transition the port to the forwarding state inside the Spanning Tree Protocol (STP).
  • The command AustinSwitch2900(config-if)#int fa 0/6 will allow you to initiate the interface.
  • The command AustinSwitch2900(config-if)#switchport access vlan 20 will allow you to assign VLAN 20 a separate port.
  • The command AustinSwitch2900(config-if)#spanning-tree portfast will allow you to transition the port to the forwarding state inside the Spanning Tree Protocol (STP).
  • The command AustinSwitch2900(config-if)#int fa0/7 will allow you to initiate the interface.
  • The command AustinSwitch2900(config-if)#switchport access vlan 20 will allow you to assign VLAN 20 a separate port.
  • The command AustinSwitch2900(config-if)#spanning-tree portfast will allow you to transition the port to the forwarding state inside the Spanning Tree Protocol (STP).
  • The command AustinSwitch2900(config-if)#int fa0/8 will allow you to initiate the interface.
  • The command AustinSwitch2900(config-if)#switchport access vlan 20 will allow you to assign VLAN 20 a separate port.
  • The command AustinSwitch2900(config-if)#spanning-tree portfast will allow you to transition the port to the forwarding state inside the Spanning Tree Protocol (STP).
  • The command AustinSwitch2900(config-if)#int fa0/8 will allow you to initiate the interface.
  • The command AustinSwitch2900(config-if)#switchport access vlan 20 will allow you to assign VLAN 20 a separate port.
  • The command AustinSwitch2900(config-if)#spanning-tree portfast will allow you to transition the port to the forwarding state inside the Spanning Tree Protocol (STP).
  • The command AustinSwitch2900(config-if)#int fa0/9 will allow you to initiate the interface.
  • The command AustinSwitch2900(config-if)#switchport access vlan 20 will allow you to assign VLAN 20 a separate port.
  • The command AustinSwitch2900(config-if)#spanning-tree portfast will allow you to transition the port to the forwarding state inside the Spanning Tree Protocol (STP).
  • The command AustinSwitch2900(config-if)#int fa0/10 will allow you to initiate the interface.
  • The command AustinSwitch2900(config-if)#switchport access vlan 30 will allow you to assign VLAN 30 a separate port.
  • The command AustinSwitch2900(config-if)#spanning-tree portfast will allow you to transition the port to the forwarding state inside the Spanning Tree Protocol (STP).
  • The command AustinSwitch2900(config-if)#int fa0/11 will allow you to initiate the interface.
  • The command AustinSwitch2900(config-if)#switchport access vlan 30 will allow you to assign VLAN 30 a separate port.
  • The command AustinSwitch2900(config-if)#spanning-tree portfast will allow you to transition the port to the forwarding state inside the Spanning Tree Protocol (STP).
  • The command AustinSwitch2900(config-if)#int fa0/12 will allow you to initiate the interface.
  • The command AustinSwitch2900(config-if)#switchport access vlan 30 will allow you to assign VLAN 30 a separate port.
  • The command AustinSwitch2900(config-if)#spanning-tree portfast will allow you to transition the port to the forwarding state inside the Spanning Tree Protocol (STP).
  • Now enter the following command AustinSwitch2900(config-if)# (enter Ctrl + Z on the keyboard).
  • The command AustinSwitch2900#copy run start will allow you to save the configuration of the system to NVRAM.
  • Configuration for 2950 Series
    • The command switch>en will allow you to enter the privileged mode.
    • The command switch>config t will allow you to enter the configuration mode.
    • The command switch(config)#hostname AustinSwitch2950 will allow you to set up the host name.
    • The command AustinSwitch2950(config)#no ip domain-lookup will allow you to turn off the DNS resolution to avoid the waiting time to the DNS lookup for the spelling errors.
    • The command AustinSwitch2950(config)#line con 0 will allow you to enter the line mode.
    • The command AustinSwitch2950(config-line)#logging synchronous will allow you to append the command line to a new line. There will be no interruption from the information items.
    • The command AustinSwitch2950(config-line)#exec-timeout 0 0 will allow you to stop the console session from getting timed out.
    • The command AustinSwitch2950(config-line)#exit will allow you to line mode.
    • The command AustinSwitch2950(config)#enable secret john will allow you to set up the secret password to the word john.
    • The command AustinSwitch2950(config)#vlan 10 will allow you to create a VLAN 10.
    • The command AustinSwitch2950(config-vlan)#name Rose will allow you to name the vlan Rose.
    • The command AustinSwitch2950(config-vlan)#vlan 20 will allow you to create a VLAN 20.
    • The command AustinSwitch2950(config-vlan)#name Rose1 will allow you to name the vlan Rose1.
    • The command AustinSwitch2950(config-vlan)#vlan 30 will allow you to create a VLAN 30.
    • The command AustinSwitch2950(config-vlan)#vlan 30 name Rose2 will allow you to name the vlan Rose2.
    • The command AustinSwitch2950(config-vlan)#exit will allow you to vlan mode.
    • The command AustinSwitch2950(config)#vtp server will allow you to convert your switch into the VTP server.
    • The command AustinSwitch2950(config)#vtp domain academy will allow you to assign the domain name academy to the server.
    • The command AustinSwitch2950(config)#int vlan1 will allow you to initiate vlan1.
    • The command AustinSwitch2950(config-if)#ip add (enter ip address here) will allow you to enter and add the ip address to the network.
    • The command AustinSwitch2950(config-if)#no shutdown is the next command on the line.
    • The last command is AustinSwitch2900(config-if)#exit. It will exit the configuration mode.
    • The command AustinSwitch2950(config)#ip default-gateway 192.168.1.1 will allow you to set the ip default-gateway.
    • The command AustinSwitch2950(config)#int fa 0/1 will allow you to initiate the interface.
    • The command AustinSwitch2950(config-if)#desc Trunk Link to Corp Router will allow you to link the system to the CORP router.
    • The command AustinSwitch2950(config-if)#switchport mode trunk will allow you to create trunk link.
    • The command AustinSwitch2950(config-if)#int range fa 0/2 - 4 will allow you to initiate the interface.
    • The command AustinSwitch2950(config-if-range)#switchport access vlan 10 will allow you to assign VLAN 10 a separate port.
    • The command AustinSwitch2950(config-if-range)#spanning-tree portfast will allow you to transition the port to the forwarding state inside the Spanning Tree Protocol (STP).
    • The command AustinSwitch2950(config-if-range)#int range fa 0/5 - 6 will allow you to initiate the interface.
    • The command AustinSwitch2950(config-if-range)#switchport access vlan 20 will allow you to assign VLAN 20 a separate port.
    • The command AustinSwitch2950(config-if-range)#spanning-tree portfast will allow you to transition the port to the forwarding state inside the Spanning Tree Protocol (STP).
    • The command AustinSwitch2950(config-if-range)#int range fa 0/9 - 12 will allow you to initiate the interface.
    • The command AustinSwitch2950(config-if-range)#switchport access vlan 10 will allow you to assign VLAN 10 a separate port.
    • The command AustinSwitch2950(config-if-range)#spanning-tree portfast will allow you to transition the port to the forwarding state inside the Spanning Tree Protocol (STP).
    • Now enter the following command AustinSwitch2900(config-if)# (enter Ctrl + Z on the keyboard).
    • The command AustinSwitch2900#copy run start will allow you to save the configuration of the system to NVRAM.