hi,

In nssa rfc.

==
3.2 Translating Type-7 LSAs into Type-5 LSAs


If the range's path type is 1 its metric is the highest cost amongst
these LSAs; if the range's path type is 2 its metric is the
highest Type-2 cost + 1 amongst these LSAs.  (See Section 2.5
step (5).)  1 is added to the Type-2 cost to ensure that the
translated Type-5 LSA does not appear closer on the NSSA
border than a translatable Type-7 LSA whose network has the
same [address,mask] pair and Type-2 cost.
==

1 is added to the type-2 cost. can anyone explain me with a topology ?

thanks
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