Sorry, I should have mentioned that this addresses Chris' question not Kris'. ;-) Brad ------------------- Good luck or good manuals, which do you want? On Mon, 22 Sep 2008, bsilva wrote: > > While there still are a few tools that want an IP address on an interface, > most (including tcpdump) are fine without one. > > What may be happening is that the interface is down, but the tool you're > using to assign the interface also brings it up. > > try: (substitute your interface for "eth3") > > # ifconfig eth3 up > or > # ip link set eth3 up > > (depending on whether you're used to using "ifconfig" or "ip") > > > Either of these commands will bring the interface up without assigning it > an IP address. Tcpdump works fine for me in this fashion. > > > > Regards, > Brad > > > ------------------- > Good luck or good manuals, which do you want? > > > > > On Mon, 22 Sep 2008, Chris Fowler wrote: > > > Kris van Rens wrote: > > > > > > However, SIOCGIFCONF does not return interface information of > > > interfaces that have no IP-address, so this method was rejected due to > > > the need for this capability. > > > > > This might be related to an issue I am having. I have a box with a 4 > > port RouterBoard. I'm using all 4 ports in a bridge to sniff parts of the > > network. Since the bridge is not part of the network, I do not assign > > an IP address to it. Tcpdump complains and some 3rd party sniffing > > programs > > refuse to work. The emit an error and terminate. My fix has been to assign > > a random IP address not on the host network. > > > > Why am I required to assign an address to an interface used only > > for promiscuous mode? > > > > Chris > > > > -- > > 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 > > -- 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
