Speaker
Mr
Philip DeMar
(FERMILAB)
Description
Fermilab hosts the American Tier-1 Center for the LHC/CMS experiment. In preparation
for the startup of CMS, and building upon extensive experience supporting TeVatron
experiments and other science collaborations, the Laboratory has established high
bandwidth, end-to-end (E2E) circuits with a number of US-CMS Tier2 sites, as well as
other research facilities in the collaboration. These circuits provide preferred
network paths for movement of high volumes of CMS data and represent a departure from
the traditional approach of utilizing the general research and education (R&E)
network infrastructure for movement of science data. All circuits are statically
configured and are based on a variety of underlying network technologies. These
circuits are presumed to provide, and generally do provide, more predictable
performance, and they avoid the traffic contention concerns of general-use R&E
network links. But the circuits also add significant complexity and effort for the
Laboratory’s wide area network support.
This presentation will discuss Fermilab’s experiences with deploying, managing, and
utilizing E2E circuits as preferred network paths in parallel with the general IP R&E
network infrastructure. Alternate path routing techniques, monitoring issues,
troubleshooting, and failover concerns will be covered. Issues of scalability and
evolution toward dynamic circuits will also be discussed.
Primary author
Mr
Philip DeMar
(FERMILAB)
Co-authors
Mr
Andrey Bobyshev
(FERMILAB)
Mr
Don Petravick
(FERMILAB)
Dr
Matt Crawford
(FERMILAB)
Mr
Maxim Grigoriev
(FERMILAB)
Mr
Vyto Grigaliunas
(FERMILAB)
