Unreachable destination

When a gateway is unable to deliver a datagram, it responds with this message. The datagram is then 'dropped' (deleted) Table 9.5.

Code

Description

0

Network unreachable

1

Host unreachable

2

Protocol unreachable

3

Port unreachable

4

Fragmentation needed and DF set

5

Source route failed

6

Destination network unknown

7

Destination node unknown

8

Source host isolated

9

Communication with destination network prohibited

10

Communication with destination node prohibited

11

Network unreachable for type of service

12

Host unreachable for type of service

Table 9.5

Unreachable code messages

Table 9.5

Unreachable code messages

In addition to the reports on errors and exceptional conditions, there is a set of ICMP messages to request information, and to reply to such request.

0 0

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