Tabella 176.2. Messaggi ICMP.
Tipo Codice Nome del tipo Nome del codice Chi lo utilizza
0 echo-reply risposta a un ping
(pong) 1
2
3 destination-unreachable traffico TCP/UDP
3 0 network-unreachable
3 1 host-unreachable
3 2 protocol-unreachable
3 3 port-unreachable
3 4 fragmentation-needed
3 5 source-route-failed
3 6 network-unknown
3 7 host-unknown
3 8
3 9 network-prohibited
3 10 host-prohibited
3 11 TOS-network-unreachable
3 12 TOS-host-unreachable
3 13 communication-prohibited
3 14 host-precedence-violation
3 15 precedence-cutoff
4 source-quench
5 redirect instradamento dei
pacchetti
5 0 network-redirect
5 1 host-redirect
5 2 TOS-network-redirect
5 3 TOS-host-redirect
6 7
8 echo-request ping
9 router-advertisement
10 router-solicitation
11 time-exceeded (ttl-
exceeded) traceroute
11 0 ttl-zero-during-transit
Tipo Codice Nome del tipo Nome del codice Chi lo utilizza
11 1 ttl-zero-during-reassembly
12 parameter-problem
12 0 ip-header-bad
12 1 required-option-missing
13 timestamp-request
14 timestamp-reply
15 information-request
16 information-reply
17 address-mask-request
18 address-mask-reply
