When the downstream PPPoE user of the ME60 dials up, 691 error occurs.
1. Use the debugging radius packet command, and find that information about the response of the authentication refusal packet with code=2 is that the username and password are incorrect.
RADIUS identifies only the username and password encrypted in PAP mode; however, it does not support CHAP. That is, RADIUS does not identify the Challenge-Password attribute in the authentication request packet with code=1. It identifies only the Password attribute. When CHAP on the virtual template is used, the user fails to dial up. When PAP is used, the authentication succeeds.
1. RADIUS does not respond.
3. The attributes of the authentication request packet with code=1 does not match RADIUS.