默认mtu 在 Linux 上检查网络连接的更多方法(2)

$ ethtool eth0

Settings for eth0:

Supported ports: [ TP ]

Supported link modes: 10baseT/Half 10baseT/Full

100baseT/Half 100baseT/Full

1000baseT/Full

Supported pause frame use: No

Supports auto-negotiation: Yes

Advertised link modes: 10baseT/Half 10baseT/Full

100baseT/Half 100baseT/Full

1000baseT/Full

Advertised pause frame use: No

Advertised auto-negotiation: Yes

Speed: 100Mb/s

Duplex: Full

Port: Twisted Pair

PHYAD: 1

Transceiver: internal

Auto-negotiation: on

MDI-X: on (auto)

Cannot get wake-on-lan settings: Operation not permitted

Current message level: 0x00000007 (7)

drv probe link

Link detected: yes

你也可以使用 ethtool 命令来检查以太网驱动程序的设置。

$ ethtool -i eth0

driver: e1000e

version: 3.2.6-k

firmware-version: 1.4-0

expansion-rom-version:

bus-info: 0000:00:19.0

supports-statistics: yes

supports-test: yes

supports-eeprom-access: yes

supports-register-dump: yes

supports-priv-flags: no

自动协商的详细信息可以用这样的命令来显示：

$ ethtool -a eth0

Pause parameters for eth0:

Autonegotiate: on

RX: on

TX: on

traceroute 命令

traceroute 命令用于显示路由路径。它通过在一系列数据包中设置数据包头的 TTL（生存时间）字段来捕获数据包所经过的路径，以及数据包从一跳到下一跳需要的时间。traceroute 的输出有助于评估网络连接的健康状况，因为某些路由可能需要花费更长的时间才能到达最终的目的地。默认mtu

$ sudo traceroute world.std.com

traceroute to world.std.com (192.74.137.5), 30 hops max, 60 byte packets

1 192.168.0.1 (192.168.0.1) 3.691 ms 3.678 ms 3.665 ms

2 10.224.64.1 (10.224.64.1) 26.273 ms 27.354 ms 28.574 ms

3 10.20.0.33 (10.20.0.33) 28.293 ms 30.625 ms 33.959 ms

4 10.20.0.226 (10.20.0.226) 36.807 ms 37.868 ms 37.857 ms

5 204.111.0.132 (204.111.0.132) 38.256 ms 39.091 ms 40.429 ms

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