Hi, Acee: Aijun Wang China Telecom
> On Jul 31, 2020, at 01:45, Acee Lindem (acee) <a...@cisco.com> wrote: > > > On 7/30/20, 1:31 PM, "Lsr on behalf of Acee Lindem (acee)" > <lsr-boun...@ietf.org on behalf of acee=40cisco....@dmarc.ietf.org> wrote: > > > > On 7/30/20, 12:37 PM, "Lsr on behalf of Peter Psenak" > <lsr-boun...@ietf.org on behalf of ppsenak=40cisco....@dmarc.ietf.org> wrote: > >> On 30/07/2020 18:03, Acee Lindem (acee) wrote: >> So, how do we define a reachable route - is it any route subsumed by the >> summary LSA that we knew about in the past that becomes unreachable? When >> the PUA is withdrawn, how do we know whether it is because of expiration of >> the interval or the route becoming reachable again? This is a slippery slope. > > I'm not suggesting the unreachable stuff to affect forwarding in any > way. [WAJ] The ultimate aim of PUA is to notify the router to bypass the advertising ABR. If not affecting the forwarding, how to avoid the traffic black hole? > > That would be better. Also, as I stated offline, it would also be better > to use encodings that would be ignored by routers that don't support the > extension. I tried to dissuade the authors of PUA not to overload the > prefix-originator LSA but was unsuccessful. > [WAJ] We can discuss this later. > Of course, I meant prefix-originator Sub-TLV and the existing LSAs indicating > reachability - > https://www.ietf.org/id/draft-ietf-lsr-ospf-prefix-originator-06.txt > > Thanks, > Acee > > Thanks, > Acee > > thanks, > Peter > > >> Thanks, >> Acee >> >> On 7/30/20, 10:34 AM, "Lsr on behalf of Peter Psenak" <lsr-boun...@ietf.org >> on behalf of ppsenak=40cisco....@dmarc.ietf.org> wrote: >> >> On 30/07/2020 16:30, Robert Raszuk wrote: >>> Hey Peter, >>> >>> Not sure how smart you really want to be here but keep in mind that BGP >>> say option C may never hear about it all the way to the egress PE in >>> other domain or area ... It is almost always incongruent with IGP. >>> >>> So if the BGP path is installed it will indeed be at risk to resolve via >>> less specific when it is still active BGP path and you too quickly >>> remove info about unreachability. >> >> again, if you are smart you can use this info to your advantage, even >> without putting it in the forwarding and leaving the less specific stuff >> intact. _______________________________________________ Lsr mailing list Lsr@ietf.org https://www.ietf.org/mailman/listinfo/lsr
