ICMP Source Quench
Source Quench is an Internet Control Message Protocol message which requests that the sender decrease the rate of messages sent to a router or host. This message may be generated if a router or host does not have sufficient buffer space to process the request, or may occur if the router or host buffer is approaching its limit.
| 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Type = 4 | Code = 0 | Header Checksum | |||||||||||||||||||||||||||||
| Empty | |||||||||||||||||||||||||||||||
| IP Header + First 8 Bytes of Original Datagram's Data | |||||||||||||||||||||||||||||||
- Type must be set to 4.
- Code must be set to 0.
- The additional data is used by the sender to match the reply with the associated request.
Read more about ICMP Source Quench: Operation of Source Quench
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—Samuel Beckett (1906–1989)
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—Edwin Arlington Robinson (1869–1935)