To create VLANs you must first enter the vlan database command at the privileged exec prompt. That should move you to the Switch(vlan)# prompt. You can then set up your VLANs with the vlan xx name yyyyyy command where xx and yyyyyy are the vlan number and name respectively. See Creating VLANs on Catalyst Switches…
Category: Networking
Changing the Configuration Register from ROMMON
Occassionally, I see the rommon 1> prompt when I log into one of our lab routers. Usually, that means that the configuration register is set to boot from rommon. So…to change that type: rommon 1 >confreg 0x2102 In order for that to take effect, power-cycle the router. Cisco Reference
Troubleshoot RIP V2 Tips
When you are working a lab exercise or adding a new network to an existing system, you might need to do some troubleshooting! Here are some things to check: Is the clock rate set correctly on the DCE? Is the routing protocol set correctly? RIP? Version 2? no auto-summary? networks? Are IPs and subnet masks set…
Subnetting a Class B License Borrowing 3 Bits
This example using Lori’s Circle Shortcut is very similar to the Class C example of borrowing 3 bits. The difference being that the increment value is added to the third octet.
Subnetting a Class B License Borrowing 2 Bits
Similar to the Class C License with 2 bits borrowed except the increment is applied to the third octet instead of the fourth octet. Lori’s Circle Shortcut explains this example.
Borrowing 7 Bits in a Class C License
You can’t do that! Can you figure out why not? Coming Soon — a podcast to explain this concept.
Subnetting a Class C License Borrowing 6 Bits
This example uses Lori’s Circle Shortcut and borrows 6 bits for a Class C License
Subnetting a Class C License Borrowing 3 Bits
Using Lori’s Circle Shortcut, this example shows borrowing 3 bits with a Class C license.
Subnetting a Class C License Borrowing 5 Bits
Almost done with the Class C examples using Lori’s Circle Shortcut, this example borrows 5 bits.
Subnetting a Class C License Borrowing 4 Bits
Continuing using Lori’s Circle Shortcut, we borrow 4 bits in this example.