Hi, Tony: I am referring to the “flood reflection” solution. I think “area proxy” is one better solution if we want actually the L1 zone to be the transited by L2 zone.
Aijun Wang China Telecom > On Dec 10, 2021, at 13:13, Tony Li <[email protected]> wrote: > > > > Hi Aijun, > >> No, I think the WG participations would like to enjoy the interested and >> correct direction topics. >> One technical considerations is the following: if IGP evolved into this >> direction, then the following connections loop diagram is also possible: >> L2-L1-L2-L1-L2-L1-…..-L2(back to the origin) >> Then, will we introduce the “AS number” to avoid loop, and various “Path >> Attributes” to influence the path selection within the IGP? > > > I think you misunderstand how Area Proxy works. > > In fact, the L1 area actually is running L1L2, so there is no need for > additional loop detection mechanisms. Within the L2 LSDB, the area’s topology > is simply abstracted away and only the interconnections with L2 systems are > visible. The area effectively looks like a single node. > > Tony >
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