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SUMMARY:Peer Dragnet: Tool for Analyzing Peer's Route Announcements and th
 eir Impact - Ashley Flavel (AT&T / University of Adelaide)
DTSTART:20071108T163000Z
DTEND:20071108T173000Z
UID:TALK8563@talks.cam.ac.uk
CONTACT:Eiko Yoneki
DESCRIPTION:Conventional practice in inter-domain BGP peering is for peers
  to advertise equally good BGP routes at every peering location. This allo
 ws the receiving service provider to determine the best possible peering l
 ink in terms of its own optimization criteria for the traffic destined to 
 the sending peer. However\, in practice\, for various reasons\, a peer mig
 ht not send equally good routes at all peering locations\, leading to unex
 pected routing and forwarding behavior in the service provider's network. 
 Thus\, it is vital to monitor routes sent by peers across locations. In th
 is talk\, we introduce a tool called "Peer Dragnet" that performs this tas
 k. The tool checks if peers send consistent routes at all locations\, and 
 if not\, determines the impact of inconsistent route announcements in term
 s of routing (e.g.\, how many routers choose different routes due to incon
 sistent announcements) and traffic (e.g.\, how flow of traffic changes in 
 the network). In this talk we provide an overview of the tool\, its method
 ology and reports that aids network operators to better understand routes 
 sent by peers and their impact.\n\nThis is joint work with Tom Scholl and 
 Aman Shaikh of AT&T Labs.
LOCATION:Lecture Theatre 2\, Computer Laboratory\, William Gates Builiding
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