Creating a broadcast storm
WillTech105
Member Posts: 216
in CCNA & CCENT
Just for testing purposes, does anyone know HOW to create a broadcast storm?
I tried config "switchport portfast" on all interfaces as well as turning off "no spanning tree vlan X" but still no crazy lights on the switches.
Has anyone ever tried making up on purpose a b'cast storm?
I tried config "switchport portfast" on all interfaces as well as turning off "no spanning tree vlan X" but still no crazy lights on the switches.
Has anyone ever tried making up on purpose a b'cast storm?
In Progress: CCNP ROUTE
Comments
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ptilsen Member Posts: 2,835 ■■■■■■■■■■What if you Ping a broadcast address to induce lots of broadcast traffic? I'm guessing ARP for an individual NIC might not induce a broadcast storm if one interface gets the response to you fast enough. (I am guessing -- you know more about this than I do)
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alxx Member Posts: 755easy way to generate traffic
ping -t -i 1024
python and scapy cross platform
great for testing
http://www.secdev.org/projects/scapy/
http://www.secdev.org/projects/scapy/doc/usage.html#interactive-tutorial
http://www.secdev.org/projects/scapy/demo.html
http://packetlife.net/blog/2011/may/23/introduction-scapy/
http://packetlife.net/blog/2011/may/25/scapy-****-sheet/
other stuff you can do with scapy
http://www.devx.com/security/Article/34741/1763/page/5
http://packetstorm.linuxsecurity.com/papers/general/blackmagic.txt
http://h.ackack.net/how-to-burn-down-any-wireless-network-around-you-and-how-to-find-out-the-exact-location-of-a-wireless-laptop.html
For work (one previous research project) we used it for visitor monitoring by detecting
wifi on peoples phones(turned on or in standby on some smart phones).Goals CCNA by dec 2013, CCNP by end of 2014 -
cisco_trooper Member Posts: 1,441 ■■■■□□□□□□Are you wanting an actual broadcast storm, or are you looking to get a bridging loop? The reason I ask is that you specifically referenced turning off spanning tree in the original post.
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Monkerz Member Posts: 842I've messed around with looping a switch not too long ago. Created a 4G etherchannel between a 3750 and a 2960. Set a host on the 3750 to constantly ping a host on the 2960 over the bundle. Issued no spanning-tree vlan 1 (all ports were vlan 1 access ports), then took the ports out of the etherchannel. Instantly the pings timed out and the active ports were blinking so fast they almost appeared solid.