hoctinhoc

1. Xem thông tin card mạng:

Trích dẫn:

[root@gateway ~]# ethtool eth0 Settings for eth0: Supported ports: [ TP MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full Advertised auto-negotiation: No Speed: 10Mb/s Duplex: Full Port: MII PHYAD: 32 Transceiver: internal Auto-negotiation: off Supports Wake-on: pumbg Wake-on: d Current message level: 0x00000007 (7) Link detected: yes

2. Xem Driver card mạng:

Trích dẫn:

[root@gateway ~]# ethtool -i eth0 driver: 8139too version: 0.9.27 firmware-version: bus-info: 0000:01:07.0 [root@gateway ~]#

3. Set tốc độ cho card mạng:


[root@gateway ~]# ethtool -s eth0 speed 10 (or 100 or 1000)



4. Set tốc độ cho card mạng (permanently on Radhat - CentOS)

Trích dẫn:

Open the file: # vi /etc/sysconfig/network-scripts/ifcfg-eth0 Thêm vào dòng bên dưới ETHTOOL_OPTS="speed 100 duplex full autoneg off" khởi động lại dịch vụ: # /etc/init.d/network restart

5. Set tốc độ cho card mạng (permanently on Debian, Ubuntu)


Click Here

6. Restart chế độ "autonegotiation"



You don’t have to reboot Linux box, all you have to do is type the following command :

# ethtool -r eth0

Or you can use mii-tool (outdated, use ethtool only)

# mii-tool -r eth0

Output:

# tail -f /var/log/messages

Mã:

Jul 16 09:34:25 smtp1 kernel: e1000: eth0: e1000_watchdog_task: NIC Link is Up 10 Mbps Full Duplex Jul 16 09:34:25 smtp1 kernel: e1000: eth0: e1000_watchdog_task: 10/100 speed

Done!


Chúc thành công!