Natural enemies of ping
Poor choice of remote host (clustered, variable load..) or monitoring host
Ping program problems and pathologies
- Some implementations have Bugs
- Spurious packets confuse ping programs (ɘ.2% effect)
- e.g. program sends 5 packets sees 10.
- Out of order packets (< 0.02% effect)
- Some sites/hosts block pings
- Other sites limit pings to a certain size
- Packet Shaping, e.g. some sites filter out ICMP traffic during high usage or all the time