Location-to-URL Mapping Architecture and Framework draft-ietf-ecrit-mapping-arch

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Location-to-URL Mapping Architecture and
Frameworkdraft-ietf-ecrit-mapping-arch

• Henning Schulzrinne
• Columbia University
• hgs_at_cs.columbia.edu

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2 summary

• Seekers
• want information
• Resolvers
• know gt 1 forest guide (but not trees)
• may only know some services
• Forest guides (many)
• know trees and their coverage regions (for one or
  more services)
• Trees (gt 1)
• have authoritative data for particular regions
  and services

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LoST Location-to-URL Mapping
VSP1
cluster serving VSP1
replicate root information
cluster serves VSP2
123 Broad Ave Leonia Bergen County NJ US
root nodes
NY US
NJ US
sippsap_at_leonianj.gov
search referral
Bergen County NJ US
Leonia NJ US
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Caching

• Resiliency requires caching
• failure, DOS on tree,
• Caching at multiple levels -- all optional
• seeker results of own queries, for one or more
  service regions
• including service regions by reference
• resolver all queries by local seekers
• top of tree lower level results within tree

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LoST architecture
tree guide
G
G
G
broadcast (gossip)
T1 .us T2 .de
G
G
resolver
T2 (.de)
seeker 313 Westview Leonia, NJ US
T3 (.dk)
T1 (.us)
Leonia, NJ ? sippsap_at_leonianj.gov
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Status next steps

• Basic text stable
• protocol for intra-cluster and inter-forest-guide
  left to define
• Will generalize to multiple services
• Move operational guidance to BCP (one para)
• Ready for WGLC after -01