One huge benefit of the new stack is that you can have 8 corosync rings, which is really powerful. Best Regards,Strahil Nikolov On Mon, Mar 28, 2022 at 9:27, Christine caulfield<[email protected]> wrote: On 28/03/2022 03:30, Somanath Jeeva via Users wrote: > Hi , > > I am upgrading from corosync 2.x/pacemaker 1.x to corosync 3.x/pacemaker > 2.1.x > > In our use case we are using a 2 node corosync/pacemaker cluster. > > In corosync 2.x version I was using udpu as transport method. In the > corosync 3.x , as per man pages, the default transport mode is knet . > And in knet it uses udp as knet method. > > I have the below doubts on the transport method. > > 1. Does knet require any special configuration on network level(like > multicast enabling).
No. What knet calls UDP is similar (from the user POV) to corosync's UDPU, it's a unicast transport and doesn't need any multicast configuration. Sorry that's confusing, but it's more technically 'correct'. The main reason UDPU was called that was because it was new to corosync when the old (multicast) UDP protocol caused trouble for some people without good multicast networks. > 2. In corosync 2.x udp was used for multicast, in knet transport does > udp mean multicast. No, see above. There is no multicast transport in knet. > 3. Will udpu be deprecated in future. > Yes. We strongly recommend people use knet as the corosync transport as that is the one getting most development. The old UDP/UDPU protocols will only get bugfixes. Knet provides muti-homing up to 8 links, and link priorities and much more. I wrote a paper on this when we first introduced knet into corosync which might help: https://people.redhat.com/ccaulfie/docs/KnetCorosync.pdf Chrissie > Kindly help me with these doubts. > > With Regards > > Somanath Thilak J > > > _______________________________________________ > Manage your subscription: > https://lists.clusterlabs.org/mailman/listinfo/users > > ClusterLabs home: https://www.clusterlabs.org/ _______________________________________________ Manage your subscription: https://lists.clusterlabs.org/mailman/listinfo/users ClusterLabs home: https://www.clusterlabs.org/
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