On both a dd-wrt and a recent asus router I have successfully got the older bonding module to bring up wireless and wired in a active/passive mode (wired is active if there). Both interfaces would have the same IP and mac address and I can unplug the wired and immediately have it switch over to wireless with no obvious drops. I can also switch back to a wired connection with no drops (usually done in the middle of a big data transfer to speed it up). This is outside of network manager, and was a major pain to get it working consistently after a reboot, but I believe it now works consistently on reboots. I believe the bonding module does force arps when it switches interfaces. On Tue, Feb 3, 2015 at 8:37 AM, Andrew R Paterson <andy.paterson@xxxxxxxxxxxx> wrote: > On Wednesday 04 February 2015 00:55:29 Tim wrote: >> Jim Lewis wrote: >> >> Quick question about DHCP reservations: I have laptops with both >> >> wired and wireless NICs, is it okay to have the router assign the >> >> same IP to both interface? >> >> I wrote: >> > I seem to recall being able to do that, with the DHCP server on my >> > Fedora Core 4 installation (having two separate MAC matching clauses >> > that applied the same IP). Other servers may try to prevent you doing >> > that, as it can be problematic. >> >> Just following up, since I wasn't clear. My comment was along the same >> lines as the original poster, trying to see what would happen if I >> assigned the same IP to wireless or wired network interfaces on my >> laptop, where only one of them would be active at any one time. >> >> The reason I tried, was that it was annoying having changing addresses, >> one way or another. Whether that was the IP address, or the named >> address attached to the current IP. >> >> For instance, my hostname might be wired.example.com or >> wireless.example.com, because the IP changed. Either change brought >> about their own set of nuisances. >> >> And, no, the common Fedora approach of associating your desired machine >> hostname against 127.0.0.1 is not a sensible alternative, either. >> >> Having multiple interfaces is a nuisance, and the best I could come up >> with was having to use the GUI to manually disconnect one device or the >> other, not letting any automatic system attempt it. >> >> A whole slew of other problems came about should both interfaces be up >> and active at the same time. > Surely "hot-swapping" IP addresses between interfaces wont work very well, > since forgetting DHCP its ARP that will cause a problem. > Each previously communicating host will have a MAC address logged in its ARP > table for the offending IP address. > If the IP address changes MAC addresses, the ARP entries on all other hosts > must time-out in order to be renewed via an ARP broadcast. > > -- > users mailing list > users@xxxxxxxxxxxxxxxxxxxxxxx > To unsubscribe or change subscription options: > https://admin.fedoraproject.org/mailman/listinfo/users > Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct > Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines > Have a question? Ask away: http://ask.fedoraproject.org -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
