1. P2PSIP diagnostics Song Haibin draft-zheng-p2psip-diagnose-02 melodysong@huawei.com

2. Diagnostic scenarios Diagnostics built into the routing protocol  E.g. Keep-alive between neighbors Diagnostics to check the overall health of the network  Overall resource consumption, malicious nodes, etc  Maybe a diagnostics server is needed Diagnostics for a single node  A node’s connectivity quality to the network  Report where the problem happens when the source can’t reach its destination  Echo message is used for this purpose

3. Echo Diagnostic message for a single node When does the diagnostic message is needed  A node wants to check its connectivity quality to the overlay (average hops, etc.) or to a specific node (Hops, RTT, detecting path loop, etc.)  To collect information of the overlay  Reload provides a piggy-back mode to collect the path nodes’ information (route-log)  but sometimes a node may just want to check its connectivity or track the failed path to see where the problem happens, without involved with other messages

4. Echo (Cont.) What information may be conveyed to the source node by Echo  Timestamp (Initiated, Received)  Hops the message routes in the overlay  Responding peer info (resource info, service capability info, address info, etc)  If loop detected in the routing  The underlay problem for failed routing Ping Mode and Traceroute mode

5. Ping Mode - only destination peer responds N80 N20 N40 P2p overlay N60 Echo Echo Response

6. Traceroute Mode - all intermediate peers respond N80 N20 N40 P2p overlay N60 Echo Echo Response