Hi Aijun, Les kindly points out that what I’ve suggested here is completely non-standard and requires multiple IS-IS instances.
Tony > On Aug 16, 2019, at 9:03 AM, tony...@tony.li wrote: > > Hi Aijun, > >> If, as you stated, we connect R1 and R7 via one link(although we will not >> do so, if we design the network hierarchically), how you flood the link >> information hierarchically but let the traffic between the two connected L1 >> area bypass the L2 area? > > > The link between R1 and R7 needs to belong to either the top area or the > bottom area. R1 or R7 needs to participate in two areas and leak routes > between the two areas. > > Tony >
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