How PPPoE packet travels from CPE to BRAS edge router ?

Ravi VK · ‎11-29-2015

Hi ,

CPE <--------------> DSLAM -------------> BRAS

Once PPPoE/PPP LCP and NCP negotiations are done , CPE and BRAS know each others MAC addresses. When a data packet encapsulated in PPP/PPPoE is sent from CPE , it will have Source MAC (say SrcMAC1) and destination MAC of BRAS (say DstMAC1) . Packet is sent from CPE to DSLAM . Will DSLAM put its source MAC here ? As per my knowledge DSLAM will not add its source mac .

Please clarify , how packet is forwarded from CPE to BRAS and vice a versa.

Richard Bradfield · ‎11-29-2015

Ravi,

again look at Wikiperdia

https://en.wikipedia.org/wiki/Point-to-Point_Protocol

gives a lot of detail.