P2PSIP N. Zong
Internet-Draft X. Jiang
Intended status: Standards Track R. Even
Expires: December 11, 2013 Huawei Technologies
Y. Zhang
June 09, 2013
An extension to RELOAD to support Relay Peer Routing
draft-ietf-p2psip-rpr-07
Abstract
This document proposes an optional extension to RELOAD to support
relay peer routing mode. RELOAD recommends symmetric recursive
routing for routing messages. The new optional extension provides a
shorter route for responses reducing the overhead on intermediate
peers and describes the potential use cases where this extension can
be used.
Status of This Memo
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1. RPR . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1.1. Relay Peer Routing (RPR) . . . . . . . . . . . . . . 4
3.2. Scenarios where RPR can be beneficial . . . . . . . . . . 5
3.2.1. Managed or closed P2P systems . . . . . . . . . . . . 5
3.2.2. Using bootstrap nodes as relay peers . . . . . . . . 5
3.2.3. Wireless scenarios . . . . . . . . . . . . . . . . . 6
4. Relationship between SRR and RPR . . . . . . . . . . . . . . 6
4.1. How RPR works . . . . . . . . . . . . . . . . . . . . . . 6
4.2. How SRR and RPR work together . . . . . . . . . . . . . . 6
5. Comparison on cost of SRR and RPR . . . . . . . . . . . . . . 6
5.1. Closed or managed networks . . . . . . . . . . . . . . . 7
5.2. Open networks . . . . . . . . . . . . . . . . . . . . . . 7
6. RPR extensions to RELOAD . . . . . . . . . . . . . . . . . . 8
6.1. Basic requirements . . . . . . . . . . . . . . . . . . . 8
6.2. Modification to RELOAD message structure . . . . . . . . 8
6.2.1. State-keeping flag . . . . . . . . . . . . . . . . . 8
6.2.2. Extensive routing mode . . . . . . . . . . . . . . . 9
6.3. Creating a request . . . . . . . . . . . . . . . . . . . 9
6.3.1. Creating a request for RPR . . . . . . . . . . . . . 9
6.4. Request and response processing . . . . . . . . . . . . . 10
6.4.1. Destination peer: receiving a request and sending a
response . . . . . . . . . . . . . . . . . . . . . . 10
6.4.2. Sending peer: receiving a response . . . . . . . . . 11
6.4.3. Relay peer processing . . . . . . . . . . . . . . . . 11
7. Discovery of relay peers . . . . . . . . . . . . . . . . . . 11
8. Security Considerations . . . . . . . . . . . . . . . . . . . 11
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12
9.1. A new RELOAD Forwarding Option . . . . . . . . . . . . . 12
10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 12
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