To OP. I hope this is to brush up towards exam or something. I don't think there is use case for areas in ISIS or multi-level ISIS. If you need scale, have separate L2 segments, combine them with BGP for seamless MPLS.
On 18 July 2017 at 15:11, Dave Bell <m...@geordish.org> wrote: > For an adjacency in L1 to come up, the area ID must match. This is not the > case for L2. > > http://www.cisco.com/c/en/us/support/docs/ip/integrated-intermediate-system-to-intermediate-system-is-is/200293-IS-IS-Adjacency-and-Area-Types.html > > On 18 July 2017 at 13:02, Aaron Gould <aar...@gvtc.com> wrote: > >> https://www.juniper.net/assets/us/en/local/pdf/study- >> guide/study-guide-jncip >> .pdf >> >> >> >> page 279 of 708 - shows the topology >> >> >> >> page 295 and 296 of 708 - begins to speak of a problem with r5 not being >> able to become adjacent with r6 and r7 because the NET's area ID portion is >> different at Level 1 with r6 and r7. once changed to 0002 to match r6 and >> r7 level 1, everything works. >> >> >> >> Question, why doesn't this then create an issue with r5 now not having a >> matching NET area ID 0001 with r3 and r4 and thus creating the same issue >> that we previously saw with r6 and r7, but now with r3 and r4 ? >> >> >> >> in other words, if the adjaceny problem from r5 to r6 and r7 was because of >> a mismatched area ID, then why after changing r5's area ID to 0002 to match >> r6 and r7, why didn't this break the adjacencies with r3 and r4 since now >> r5 >> deosn't match r3 and r4 area id of 0001 ? >> >> >> >> -Aaron Gould >> >> _______________________________________________ >> juniper-nsp mailing list juniper-nsp@puck.nether.net >> https://puck.nether.net/mailman/listinfo/juniper-nsp >> > _______________________________________________ > juniper-nsp mailing list juniper-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/juniper-nsp -- ++ytti _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
