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Real-Time BGP Data Access

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claus
14 diapositives · 347 Views · Aug 23, 2014

Real-Time BGP Data Access. Mikhail Strizhov Colorado State University . Introduction. Real-Time BGP data What is it and Do you really need it? What can you do with it? Where and how can you get it? Running your own BGP collector BGPmon : real-time, scalable, extensible monitoring system

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  1. Real-Time BGP Data Access Mikhail Strizhov Colorado State University Real-Time BGP Data Access

  2. Introduction • Real-Time BGP data • What is it and Do you really need it? • What can you do with it? • Where and how can you get it? • Running your own BGP collector • BGPmon: real-time, scalable, extensible monitoring system • Software architecture and design • BGPmon at Colorado State University Real-Time BGP Data Access

  3. Background AS Path: CBE • Autonomous System (AS) • Border Gateway Protocol (BGP) • Profit-driven policy AS Path: DE AS C AS D AS Path: BE AS B AS E I own prefix p! AS A Peer-Peer AS Path: ABE Customer-provider AS update message Real-Time BGP Data Access

  4. Background (cont.) AS Path: CBA AS Path: CBE • BGP lacks authentication • Fabricated AS announcement • Prefix hijacking AS C AS D AS B AS Path: BA AS E p April 8, 2010: Chinese ISP hijacks the Internet: China Telecom originated 37,000 prefixes not belonging to them in 15 minutes, causing massive outage of services globally. AS A Peer-Peer Customer-provider I own prefix p! AS update message Real-Time BGP Data Access 4

  5. BGP Message Example • “Bits off the wire” between two BGP speakers: • 4001010040020C020536D900D10D1C10866E0F400304C02BD98D18BD5533 • Not easy to analyze. RFC 4271 has all details. • How we can represent BGP message in human readable format? • Extensible Markup Language (XML) • Extensible and easy to use data format. • It is widely used for the representation of arbitrary data structures. • It is common for XML to be used in interchanging data over the Internet (RFC 3023). Real-Time BGP Data Access

  6. XML-Based Format for Representing BGP Messages (XFB) <ASCII_MSG> <LENGTH>53</LENGTH> <TYPE value="2">UPDATE</TYPE> <UPDATE> <ATTRIBUTE> <LENGTH>12</LENGTH> <TYPE value="2">AS_PATH</TYPE> <AS_PATH> <AS_SEG type="AS_SEQUENCE" length="5"> <AS>14041</AS><AS>209</AS> <AS>3356</AS> <AS>4230</AS><AS>28175</AS> </AS_SEG> </AS_PATH> </ATTRIBUTE> <ATTRIBUTE> <LENGTH>4</LENGTH> <TYPE value="3">NEXT_HOP</TYPE> <NEXT_HOP>192.43.217.141</NEXT_HOP> </ATTRIBUTE> <NLRI count="1"> <PREFIX label="DPATH" afi="IPV4" afi_value="1" safi="UNICAST" safi_value="1">189.85.51/24</PREFIX> </NLRI> </UPDATE> BGP message total length BGP message type, according to RFC 4271 BGP AS Path data Not difficult, right? Next Hop data Announced Prefix Real-Time BGP Data Access

  7. Receiving Data in Real-time • Service is available now! • BGP update messages are accessible within a few seconds • Open telnet session or establish TCP connection to livebgp.netsec.colostate.eduport 50001 • Full BGP table snapshots are available every 2 hours • Open telnet session or establish TCP connection to livebgp.netsec.colostate.eduport 50002 Real-Time BGP Data Access

  8. Example of XML Data Real-Time BGP Data Access

  9. Running Your Own Collector • In order to monitor your own BGP router and network prefixes, you should: • Download and install BGP Monitoring System (BGPmon) • Run usual ./configure && make && make install • Create BGP peering session between router and BGPmon instance. • That’s all! Real-time data is available at port 50001 and 50002 of your BGPmon. • Project Website http://bgpmon.netsec.colostate.edu Real-Time BGP Data Access

  10. Merging Your Collector with Existing Collectors More than 100 peers Your router Your BGPmon Client A Oregon RouteViews Collectors 8 peers around the world FRGP Rogers BGPmon at Colorado State University Client B Tiscali Real-Time BGP Data Access

  11. BGPmon Architecture RIB-IN table Periodic thread Peer thread Client thread Router 1 Server thread Client Peer thread Client thread Label thread XML thread Router 2 Client Peer Queue Label Queue XML update queue Client thread MRT thread Client thread Client Chain thread Routing Collector XML RIB-IN queue Client thread Chain thread BGPmon BGPmon Real-Time BGP Data Access

  12. BGPmon features • Open Source multi-threaded software • Support IPv4 and IPv6 • Support 2-byte and 4-byte AS numbers • Load balancing (Fast writers/Slow readers) • Queuing and Pacing Algorithms • Backward-compatible with existing Routing Collectors via MRT format (draft-ietf-grow-mrt-13) • Quagga to BGPmon patch available from RouteViews Real-Time BGP Data Access

  13. Conclusions • BGPmon Provides Real-Time BGPdata in a scalable way. • Essential Data Necessary for BGP Analysis • Enables Wide Range of New Services • BGPmon represents an important change in how BGP monitoring is accomplished in the Internet • BGPmon makes it much simpler for researchers and operators to obtain BGP data. Service is available now – http://bgpmon.netsec.colostate.edu Real-Time BGP Data Access

  14. Questions Real-Time BGP Data Access