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Internet Control Message Protocol (ICMP) Message Types
Table 26-1. ICMP Messages and Their Definitions
Symbol
Type
Code
9
0
10
0
&
11
0
1
12
1
2
13
0
14
0
15
0
16
0
17
0
18
0
Description
router advertisement
router solicitation
time exceeded:
time-to-live equals 0 during transit
time-to-live equals 0 during reassembly
parameter problem:
IP header bad (catchall error)
required option missing
timestamp request
timestamp reply
information request (obsolete)
information reply (obsolete)
address mask request
address mask reply
Query
Error
•
•
•
•
•
•
•
•
•
•
•
•