How do I check the auto-negotiated speed of a network interface on OpenBSD? When I force a specific speed, ifconfig will show it in the "media" line; but if the interface is in auto-negotiation mode, I can't find a way to retrieve the network speed effectively negotiated. Thanks for your help!
Asked
Active
Viewed 1,271 times
1 Answers
0
If auto-negotiation is successful, you should also see it on the media line:
media: Ethernet autoselect (1000baseT full-duplex,master,rxpause,txpause)
The lack of the above output, or the need to force a particular speed, may indicate you have another problem (..bad cable; unsupported interface or hardware issue).
brynet
- 1
- 2
-
Hi, thanks for your reply, but my media line just shows "media: Ethernet autoselect", nothing more. It's a KVM virtual machine, so no bad cables, hardware problems or unsupported NIC. The SIOCGIFMEDIA syscall returns IFM_AUTO, so no information on link speed. Any other suggestions? Thanks. – Andy G Jul 20 '15 at 06:44