Symptom
The Cisco ASR9000 used as BNG may continue to send Configuration Request packet after having received the Protocol-Reject. This behaviour is not inline with the RFC1661 that states that:
--- snippet of the RFC ---
Upon reception of a Protocol-Reject, the implementation MUST stop
sending packets of the indicated protocol at the earliest
opportunity.
--- snippet of the RFC ---
Conditions
In PPP deployment with the ASR9k BNG solution. Noticed in 5.2.4.
Workaround
The command "ppp ipcp passive? will prevent BNG to pro-actively generate IPCP. BNG will wait for client to initiate IPCP.
