Hi ALL, As per RFC 2328 for OSPFv2 authentication type 2 is used for cryptographic authentication wherein keyed MD5 was mentioned.
Same authentication type is used for HMAC-SHA2 family algorithms mentioned via RFC 5709. For ISIS authentication type varies between MD5 and HMAC-SHA2 family. The same case applies to BFD as well (different authentication types are used for keyed-MD5, keyed SHA etc..). If other protocols such as ISIS and BFD have a different authentication types for MD5 and HMAC-SHA for what reason OSPF has to use same authentication type for MD5 and HMAC-SHA2 family. Thanks, Vinayaka G
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