1.

Explain Broadband Call Flow?

Answer»
  1. When the PPPoE client is dialed, the PPPoE client broadcasts a PPPoE Active Discovery Initiation (PADI) message to BNG.
  2. The BNG that RECEIVE the PADI message respond with a PPPoE Active Discovery Offer (PADO) message advertising the domains and contexts they support if configured to advertise.
  3. The PPPoE Client SENDS a PPPoE Active Discovery Request (PADR) message to the BNG.
  4. The BNG receives the PADR message and prepares to bring up the PPP session. Then responds with PPPoE Active Discovery Session-Confirmation (PADS) message advertising PPPoE session ID.
  5. The PPPoE Client sends PPP LCP Configuration Request message advertising to BNG.
  6. The BNG responds with PPP LCP Configuration Ack if PPP parameters are acceptable.
  7. The BNG then sends PPP CHAP Challenge to PPPoE Client.
  8. The PPPoE Client responds with PPP CHAP Response.
  9. The BNG sends Access-Request packet to AAA Server with the session’s PPP USERNAME and CHAP password.
  10. AAA sever reply Access-Accept to BNG and BNG will RELEASE public ip to the subscriber.


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