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Aman Shaikh WIRED Position Statement
UCSC
1
Position Statement
WIRED 2003
Workshop on Internet Routing Evolution and Design
Aman Shaikh
University of California, Santa Cruz (UCSC)
AT&T Labs - Research
Aman Shaikh WIRED Position Statement
UCSC
2
Outline• Routing at the box-level
• Routing at the network-level
• Routing system as a whole
• Analytical and simulation models
• Reducing the pain of administrators
Aman Shaikh WIRED Position Statement
UCSC
3
Routing at Box-level• Router Design
– Router is a complex beast...• hardware and software issues, protocol
implementation, resource contention, forwarding table construction/updates etc...
– Vendors need to de-mystify the beast• How much can they open up?
• Black-box characterization– Better analytical and simulation models– Vendor-independent benchmarking
Aman Shaikh WIRED Position Statement
UCSC
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Routing at Network-level• Data, data, data...
– Smart collection of data• How to collect “right” amount and kind of data from
the “right” set of vantage-points?
– How to make the data accessible to researchers without compromising proprietary nature of the data?
– Joining of data from multiple sources• Not as easy as one might think; believe Renata…:-)
Aman Shaikh WIRED Position Statement
UCSC
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Routing System as a Whole• Most of the research has focused on
protocols in isolation
• Time to focus on the system as a whole– How do protocols interact?
• at box and network levels
• in terms of convergence, stability, reliability and availability
– Example: making “super-fast” IGPs has received a fair bit of attention. However, most of the traffic is routed by BGP which in turn relies on IGPs to resolve next-hops. Convergence story is not as simple as one might think.
Aman Shaikh WIRED Position Statement
UCSC
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Analytical and Simulation Models• Need analytical and simulation models
– To study large network-wide dynamics
– To understand trade-offs between design alternatives
– To analyze impact of new features and extensions
• Where do we go from NS2 and dumbbell topologies!!??– Is SSFNET the answer?
– Should we look at other fields?
– How do we validate models?
Aman Shaikh WIRED Position Statement
UCSC
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Reducing the Administrators’ Pain• “Network core is simple” is a myth :-(
• How can we help the administrators beyond giving them a load of Tylenols?– Network assessment– Configuration management
• From device-level to network-level
• Tweaking the knobs
– Debugging routing problems• Especially those spanning multiple domains
– Seamless hardware and software upgrade
Aman Shaikh WIRED Position Statement
UCSC
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Wiring it up…• Routing at the box-level
• Routing at the network-level
• Routing system as a whole
• Analytical and simulation models
• Reducing the pain of administrators