IPv4 - ICMPv4
課程影片
除了影片之外可以看 icmp(7)
這個 man
中的條目。
第 7LMN 講 路由器運作原理以及網路互連技術 L07 12 13 14
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Possible Reasons
- The image file may be corrupted
- The server hosting the image is unavailable
- The image path is incorrect
- The image format is not supported
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Lec38 計算機網路 第四章 Internet Protocol Layer (12/19)
Image Not Showing
Possible Reasons
- The image file may be corrupted
- The server hosting the image is unavailable
- The image path is incorrect
- The image format is not supported
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Enhancing Ping And Traceroute (Netdev 0x15)
Image Not Showing
Possible Reasons
- The image file may be corrupted
- The server hosting the image is unavailable
- The image path is incorrect
- The image format is not supported
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Image Not Showing
Possible Reasons
- The image file may be corrupted
- The server hosting the image is unavailable
- The image path is incorrect
- The image format is not supported
Learn More →
目標:回報丟棄封包的原因
ICMPv4 封包格式
規格在 RFC792:
Linux 核心定義在 include/uapi/linux/icmp.h
:
type
與 code
–- 封包失敗的理由
參考 Internet Control Message Protocol (ICMP) Parameters: