Hi, Shraddha: The PUA/UPA message is mainly for control plane switch over, not for data plane switch over. For the planned maintenance, the controller plane switch over should be planned as well. It doesn’t need IGP to step in.
Aijun Wang China Telecom > On Mar 29, 2023, at 00:29, Shraddha Hegde > <[email protected]> wrote: > > Most maintenance operations I have seen use ISIS overload with max metric > advertise mechanism to > Switch the overlay services to another node. While this mechanism works fine > for MPLS environments that > Leak the loopbacks across domains and in BGP-LU based environments, this > mechanism is not > Available in deployments that use summarized prefixes for reachability. > > Rgds > Shraddha > > > Juniper Business Use Only > > -----Original Message----- > From: Aijun Wang <[email protected]> > Sent: Tuesday, March 28, 2023 4:32 PM > To: Peter Psenak <[email protected]> > Cc: Shraddha Hegde <[email protected]>; Robert Raszuk <[email protected]>; > lsr <[email protected]> > Subject: Re: [Lsr] Interdomain UPA & UP Flag > > [External Email. Be cautious of content] > > > The following sentence should be: >> If it is planned, why the overlay service being switched over as scheduled? > > If it is planned, why doesn’t the overlay service be switched over as > scheduled? > > > > > Aijun Wang > China Telecom > >> On Mar 28, 2023, at 19:53, Aijun Wang <[email protected]> wrote: >> >> There is no significant benefits to use the prefix unreachable announcement >> mechanism to transfer the planned maintenance information. >> >> If it is planned, why the overlay service being switched over as scheduled? >> >> The PUA/UPA mechanism is mainly for the fast switchover of overlay services >> upon the accident network failures. >> >> Please pay more attentions to other aspects of such mechanism. >> >> Aijun Wang >> China Telecom >> >>>>> On Mar 28, 2023, at 18:51, Peter Psenak >>>>> <[email protected]> wrote: >>>>> >>>>> On 28/03/2023 11:41, Aijun Wang wrote: >>>>> There is already overload bit to accomplish the maintenance >>>>> purposes, Why do you guys repeat such work again? >>> >>> OL-bit is only propagated inside the area. We are solving >>> inter-area/inter-domain routing convergence here. >>> >>> Peter >>> >>>> Aijun Wang >>>> China Telecom >>>>>> On Mar 28, 2023, at 18:00, Shraddha Hegde >>>>>> <[email protected]> wrote: >>>>> >>>>> Hi Robert, >>>>> >>>>>> Second, if you say this is needed for BGP free deployments then I >>>>>> question the merit on the basis that UPA is >ephemeral and expires >>>>>> say in 120 sec which will not be enough fo _______________________________________________ Lsr mailing list [email protected] https://www.ietf.org/mailman/listinfo/lsr
