interface input error

https://www.cisco.com/en/US/docs/internetworking/troubleshooting/guide/tr1904.html#wp1020996

原先目標是抓interface crc error，這值如果持續產生有很大機率是線材的問題，

結果目標設備不支援，只好改抓input error，input error 的原因則較多了，

Includes runts, giants, no buffer, CRC, frame, overrun, and ignored counts. Other input-related errors can also cause the input error count to be increased, and some datagrams may have more than one error; therefore, this sum may not balance with the sum of enumerated input error counts.

runts, giants, no buffer, CRC, frame, overrun, and ignored都是input error原因之一，

但這些數量總合不會等於input error，因為封包發生錯誤也許原因不只一種。

macOS ssh 失敗（diffie-hellman-group1-sha1）

Unable to negotiate with xxx.xxx.xxx.xxx port 22: no matching key exchange method found. Their offer:diffie-hellman-group1-sha1

ans:

ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 name@xxx.xxx.xxx.xxx