Author: Mike

Categories
Networking

DHCP Troubleshooting & Wireshark

The other day I needed to do some DHCP troubleshooting. I have yet to learn all that tcpdump can do (I know it can do this filtering as well), so I at this time do most of my filtering in wireshark. icon-WireShark

Say you are looking for just the packets pertaining to one particular mac address. You can view these by using the following wireshark filter:

bootp.hw.mac_addr == 00:aa:bb:cc:dd:ee

I have found this to be very useful when I am trying to debug issues client devices maybe having or looking at the dhcp options being sent to a dhcp server.

Categories
Networking

Resetting Cisco Config to Default

There are a couple of ways you can go about resetting a cisco switch back to its default state, however, I recommend this over doing a write erase.

Simply use the following commands to erase the running configuration and go back to factory state:

delete flash:vlan.dat
erase startup-config
reload

Categories
General

Welcome to iBeta.org

Here I will blog about the random things related to technology and other items that I get into as time progresses. I hope that here I can share things that I know or learn on my journeys that may help others with similar interests. If you like what you read, please share and help me grow the site further. Feel free to comment and let me know your thoughts on particular articles and if you have anything to share please do so!

-Mike