TL - ER6520G routers, log frequent prompt:
Detect Large ping attack, discarding the packet 3, attack source: TBD.
And fragmentation attack, attack source is TBD,
There are a lot of "suspected ARP attack packet router detected, please pay attention!"

All of the computer network has IP binding MAC, Intranet, on most computers can only a few units can be on the network,

How do I determine attack source come from? TBD is refers to the attack from the network? Thank you very much!