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@ntlworld.com 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@lists.fedoraproject.org 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