How to Configure OSPF Plain Text Authentication

does OSPFv2 do the encryption or only ospfV3 does ??

Hello Narad

OSPFv2 does use MD5 for encryption of the authentication process. You can find out more here:

In addition, OSPFv2 based on RFC 2328 allows only MD5, but RFC 5709 has added the use of HMAC-SHA algorithms for cryptographic authentication.

As for OPSFv3, it supports authentication with IPsec. You can find out more about that here:

I hope this has been helpful!