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With access-group in you are controlling all the traffic that is coming into the router through that interfce . If you are applying the access-group out that is effective for traffic going out of that interfce , i.s you want to control the traffic...
The Reason fields tell what caused teh spf calculations and the letter in the reason field denotes the following... R, router link change N, network link change SN, summary network link change SA, ASBR summary change X, external change - Hari Murthy
