1. All Rights Reserved © Alcatel-Lucent 2006, ##### Improved Register Procedure in PIM-SM draft-wen-pim-improved-register-00.txt Haibo WEN

2. All Rights Reserved © Alcatel-Lucent 2006, ##### 2 | Presentation Title | Month 2006 Register procedure in current PIM-SM 1.Current procedure The data-plane and control-plane are not clearly separated in PIM-SM  The sender sends MC data packets once it wants to do, no control message exchange in control-plane.  At the DR, MC packets from sender trigger Register message (with encapsulation of MC data packets) in control plane.  The Register messages of this kind continue being sent until DR receives Register-Stop message. RP decapsulates the Register message and send the payload along the RP tree in the data plane.  Encapsulation and de-capsulation are relatively expensive operations for routers.  The arriving of native MC data packets in data-plane at RP will trigger Register-Stop message in control- plane. 2. Security issue  Malicious user will use this feature to attack the network by sending all kinds of MC data

3. All Rights Reserved © Alcatel-Lucent 2006, ##### 3 | Presentation Title | Month 2006 Improved PIM-SM register procedure (1/2)  Basic idea:DR will not forward/encapsulate MC until the delivery path has been established.  Once the MC path from DR to RP has been established, the MC packets from the sender will be forwarded.  Separate control plane and data plane completely  Registering Process in the control-plane –Sender management (logical messages. Two choices: (i) IGMP/MLD can be extended for this purpose; (ii) define new protocol)) – Sender-Request: request for sending MC data. – DR-ACK: positive indication for allowing the sender to send MC data. – DR-NAK: negative indication for not allowing the sender to send MC data. – Sender-Alive: periodically sent by the sender to notify the DR that the sender is alive. – Sender-Leave: the sender notifies the DR that it will not send MC data any more. –DR ’ s register process (define 3 new messages except Join) – Register-Request: DR sends this message to RP to register. – Join: to join the MC delivery tree – SPT-OK: to notify the downstream routers on the SPT that the sender is alive, update the corresponding status in routers. Periodically sent from the root of SPT, either responded as a newly branch grafting this SPT. – MC-Over: the sender will not send MC data, the SPT will be deleted (the corresponding status will be removed  MC data packets delivery in the data-plane

4. All Rights Reserved © Alcatel-Lucent 2006, ##### 4 | Presentation Title | Month 2006 Advantages:  Simplify the logic of registering procedure.  Clearly separate the control- plane and data-plane is good for speeding up data forwarding.  Authentication for MC sender can easily implemented in this procedure  No encapsulation and de- capsulation for MC data at the routers  SPT-OK along the SPT setting SPTbit removes the mechanism of MC data setting SPTbit, Keepalive timer  It’s good for fast forwarding. Improved PIM-SM register procedure (2/2)

5. All Rights Reserved © Alcatel-Lucent 2006, ##### Thank you!