Date: Thu, 08 May 2003 11:56:35 -0400 From: Jeff Garzik <jgarzik@pobox.com> > That is not necessarily the case. What is the case is that > you absolutely cannot assume that a non-UP interface will give > a valid link status. Correct. And this will become -more- true as time goes on. Ideally we will be powering-down the NICs if the interface has been down more than a few seconds. It's just luck and (in some cases) ancient drivers, that getting link-status when interface is down works at all. OK. So why are you testing for "running" rather than "up"? Are these two synonymous in the kernel? More generally, I need some help understanding how to configure a "down" interface to detect link beat. My program polls the known interfaces to see if there are any changes to link beat. Right now I'm just ORing in IFF_UP to the existing set of flags but I worry that by doing so I'm doing too much. Is there a minimum set of flags that will give me access to link beat without making the interface fully active? - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
