"MRT routing information export format", Larry Blunk, Manish Karir, Craig Labovitz, 13-Jul-09. ( bytes)

This document describes the MRT format for routing information export. This format was developed in concert with the Multi-threaded Routing Toolkit (MRT) from whence the format takes it name. The format can be used to export routing protocol messages, state changes, and routing information base contents.

"BGP Monitoring Protocol", John Scudder, Rex Fernando, Stephen Stuart, 13-Jul-09. ( bytes)

This document proposes a simple protocol, BMP, which can be used to monitor BGP sessions. BMP is intended to provide a more convenient interface for obtaining route views for research purpose than the screen-scraping approach in common use today. The design goals are to keep BMP simple, useful, easily implemented, and minimally service-affecting. BMP is not suitable for use as a routing protocol.

"Routing System Stability", Dimitri Papadimitriou, James Lowe, 22-Mar-09. ( bytes)

Understanding the dynamics of the Internet routing system is fundamental to ensure its robustness/stability and to improve the mechanisms of the BGP routing protocol. This documents outlines a program of activity for identifying, documenting and analyzing the dynamic properties of the Internet and its routing system.

"MPLS Tunnels for Virtual Aggregation", Paul Francis, Xiaohu Xu, 23-May-09. ( bytes)

The document "FIB Suppression with Virtual Aggregation" [I-D.francis-intra-va] describes how FIB size may be reduced. The latest revision of that draft refers generically to tunnels, and leaves it to other documents to define the usage and signaling methods for specific tunnel types. This document provides those definitions for MPLS Label Switched Paths (LSP), without tag stacking.

"FIB Suppression with Virtual Aggregation", Paul Francis, Xiaohu Xu, Hitesh Ballani, Dan Jen, Robert Raszuk, Lixia Zhang, 23-May-09. ( bytes)

The continued growth in the Default Free Routing Table (DFRT) stresses the global routing system in a number of ways. One of the most costly stresses is FIB size: ISPs often must upgrade router hardware simply because the FIB has run out of space, and router vendors must design routers that have adequate FIB. FIB suppression is an approach to relieving stress on the FIB by NOT loading selected RIB entries into the FIB. Virtual Aggregation (VA) allows ISPs to shrink the FIBs of any and all routers, easily by an order of magnitude with negligible increase in path length and load. FIB suppression deployed autonomously by an ISP (cooperation between ISPs is not required), and can co-exist with legacy routers in the ISP.

"Requirements for the graceful shutdown of BGP sessions", Bruno Decraene, Pierre Francois, cristel pelsser, Zubair Ahmad, Antonio Jose Elizond Armengol, 5-Jun-09. ( bytes)

The BGP protocol is heavily used in Service Provider networks both for Internet and BGP/MPLS VPN services. For resiliency purposes, redundant routers and BGP sessions can be deployed to reduce the consequences of an AS Border Router or BGP session breakdown on customers' or peers' traffic. However simply taking down or even up a BGP session for maintenance purposes may still induce connectivity losses during the BGP convergence. This is no more satisfactory for new applications (e.g. voice over IP, on line gaming, VPN). Therefore, a solution is required for the graceful shutdown of a (set of) BGP session(s) in order to limit the amount of traffic loss during a planned shutdown. This document expresses requirements for such a solution.

"Graceful BGP session shutdown", Pierre Francois, Bruno Decraene, cristel pelsser, Clarence Filsfils, 15-Jun-09. ( bytes)

This draft describes operational procedures aimed at reducing the amount of traffic lost during planned maintenances of routers, involving the shutdown of BGP peering sessions.

"GRE and IP-in-IP Tunnels for Virtual Aggregation", Paul Francis, Robert Raszuk, Xiaohu Xu, 6-Jul-09. ( bytes)

The document "FIB Suppression with Virtual Aggregation" [I-D.grow-va] describes how FIB size may be reduced. That draft refers generically to tunnels, and leaves it to other documents to define the tunnel establishment methods for specific tunnel types. This document provides those definitions for GRE and IP-in-IP tunnels.

"Performance of Virtual Aggregation", Hitesh Ballani, Paul Francis, Dan Jen, Xiaohu Xu, Lixia Zhang, 5-Jul-09. ( bytes)

The document "FIB Suppression with Virtual Aggregation" [I-D.francis-intra-va] describes how router FIB size may be reduced. This approach entails a trade-off between path-length and load versus FIB size. It also has the potential to reduce convergence time. This document describes the results of several studies that examine these characteristics. The results of a study for a Tier-1 ISP with a relatively sophisticated deployment of VA, shows that FIB size could be reduced ten times or more with a worst-case latency penalty of 4ms and a worst-case load increase of <1.5%. Another study, examining a much simpler style of VA deployment, also for a Tier-1 ISP, shows that FIB size can be reduced by four times (in routers serving as APRs), and more than 10 times in other routers. Here, worst-case latency increase was 16 ms, though this is almost certainly an over-estimate, both because traceroute was used to make the measurement, and because popular prefixes were not considered.

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