The setup is as follows - [Sending server NIC][TX]-----fiber conductor----[RX][Receiving server NIC]. A physical setup limitation provides only a single fiber conductor between the servers, but it should still be doable as traffic is always unidirectional (over connectionless protocol) from sending server to receiving server. In such case the receiving server NIC status is UP and processing ingress frames, however the sending server NIC status is down as it doesn't detect light on its RX. of course if I supply light to the sending server NIC from another NIC on the same server the link goes up and it works as expected, but I suspect it may be possible to force the link status on driver / OS level. And no, its not part of dharma initiative... On Tue, May 25, 2010 at 11:05 PM, Chris Fowler <cfowler@xxxxxxxxxxxxxxxxxxx> wrote: > > On Tue, 2010-05-25 at 22:00 +0200, Jan Ceuleers wrote: > > On 25/05/10 12:58, Yossi Ben Hagai wrote: > > > Is it possible to force a fiber Ethernet NIC (Broadcom NetXtreme > > > 1000SX) to have the link status as up, or in any other way be able to > > > transmit even when there is no light received on the RX conductor? > > > I have looked on ifup, ifconfig and ethtool man pages and didn't find > > > such option. I guess it may also be possible on the driver level and > > > would appreciate any hints. > > > > If such functionality existed, it would be a risk to nearby people's eyesight. > > - > > Not sure I understand how it would hurt my eyes. > > I could not even think of any reason to have such functionality, but > then I thought NetworkManager. If there is no link on an interface then > NM will remove the IP address off that interface. Is the purpose of > keeping it up to keep NM from removing the address? What would be the > purpose of keeping the interface in the UP state if nothing was > connected? > > -- > To unsubscribe from this list: send the line "unsubscribe linux-net" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
