1 / 12

Monitoring the 10 Gigabit Abilene Backbone

Monitoring the 10 Gigabit Abilene Backbone. J örg Micheel <joerg@nlanr.net>. Passive measurement hardware. Collect all data without loss (buffer, indicate loss) Flexible payload discard, early Provide accurate local/global timing of packet arrivals

corby
Télécharger la présentation

Monitoring the 10 Gigabit Abilene Backbone

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Monitoring the10 Gigabit Abilene Backbone Jörg Micheel <joerg@nlanr.net> Joint Techs, Columbus, OH

  2. Passive measurement hardware • Collect all data without loss (buffer, indicate loss) • Flexible payload discard, early • Provide accurate local/global timing of packet arrivals • Have host CPU(s) available for analysis and display • Optionally accelerate analysis computation Joint Techs, Columbus, OH

  3. PCI bus vs. network links Joint Techs, Columbus, OH

  4. NICs vs. NMCs • NICs have inherent packet rate limit due to per packet buffer and interrupt handshake • Interrupts are more costly than ever before! • Do away with classic NIC driver, specialized driver and API library • NMCs use single circular buffer with overflow control • Handshake between HW and application • Zero copy data transfer (DMA into user space) • Network analysis at uncached RAM performance (i.e. 1450 MByte/sec on Dell 2650) Joint Techs, Columbus, OH

  5. Some performance tests • GigE cards: D-Link, SysKonnect 9843, DAG4.3GE • OC48c PoS cards: Lucent OptiStar, Dag4.3 OC48c • libpcap interface (straight, mmap), DAG API library • Fake application: CRC32 computation • Result: line rate performance for all NMCs • Result: can do full bidirectional Gigabit to RAID0 array Joint Techs, Columbus, OH

  6. DAG6 OC192c/10GigE Joint Techs, Columbus, OH

  7. Abilene backbone 2004 Joint Techs, Columbus, OH

  8. IPLS installed NLANR gear • Two NLANR OC192MONs, one OC48MON, CDMA time synchronization via Praecis Ct and TDS-24 • Instrumented all present Abilene backbone links (IPLS-KSCY, IPLS-CHIN, IPLS-ATLA) • Planned to stay there for the lifetime of the backbone Joint Techs, Columbus, OH

  9. Measurement and Analysis • Collect substantial backbone data set (Abilene-3) • Stratified random sampling over weeks (Abilene-4) • Landspeed record load; impact studies on application and network performance • Monitoring TCP happiness via real time application • NLANR real time applications • Router delay studies • More challenges from collaborators! Joint Techs, Columbus, OH

  10. Abilene-3 data set analysis Joint Techs, Columbus, OH

  11. Acknowledgements • Koryn Grant, Endace • Matt Zekauskas, Rick Summerhill, Caroline Carver, Internet2 • John Hicks, TransPAC/Indiana Joint Techs, Columbus, OH

  12. References • http://198.202.123.33/Special/ipls3.html • http://198.202.123.33/Sites/ipls-2004/ • http://198.202.123.33/Special/ipls3/ • ftp://198.202.123.33/traces/long/ipls/3/ Joint Techs, Columbus, OH

More Related