When NE80E suffers from TTL timeout packet attack, CPU usage is high. How to check the board suffers from TTL timeout packet alarm?
display ip statistics slot 2 //Display with this command
Input: sum 4503785 local 2516
bad protocol 0 bad format 0
bad checksum 0 bad options 0
TTL exceeded 787257 // receiving TTL timeout IP packet number of the board
Output: forwarding 0 local 786037
dropped 0 no route 0
Fragment:input 0 output 0
fragmented 0 couldn't fragment 0
Reassembling:sum 0 timeouts 0
Check with the command. If the following number of TTL exceeded increases quickly, it is TTL timeout packet attack or there is loop.