2 1,destination-unreachable,3
3 2,network-unreachable,3/0
5 4,protocol-unreachable,3/2
7 6,fragmentation-needed,3/4
8 7,source-route-failed,3/5
11 10,network-prohibited,3/9
12 11,host-prohibited,3/10
13 12,TOS-network-unreachable,3/11
14 13,TOS-host-unreachable,3/12
15 14,communication-prohibited,3/13
16 15,host-precedence-violation,3/14
17 16,precedence-cutoff,3/15
20 19,network-redirect,5/0
22 21,TOS-network-redirect,5/2
23 22,TOS-host-redirect,5/3
25 24,router-advertisement,9
26 25,router-solicitation,10
28 27,ttl-zero-during-transit,11/0
29 28,ttl-zero-during-reassembly,11/1
30 29,parameter-problem,12
32 31,required-option-missing,12/1
33 32,timestamp-request,13
35 34,address-mask-request,17
36 35,address-mask-reply,18