Hi Authors, All, OSPF Extended Prefix Range TLV defined in RFC 8665 has IA flag to distinguish between Intra and Inter Area scope prefixes. Whether any restrictions to not to use Prefix Range TLV for external/NSSA prefixes ? For External Prefixes, we can able to use Prefix Range TLV by using LSA type (based on AS scope Opaque Type , so the TLV is for External Prefixes) But If we need to use the Prefix Range TLV for NSSA prefixes (Type-7) , which are in area scope, there is no flag/route-type field in this TLV to distinguish between Intra or NSSA prefixes( as IA flag will not be set anyway).
Thanks & Regards, Veerendranath
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