NDNS: DNS in NDN Alex Afanasyev, Yukai Tu, Xiaoke Jiang, Lixia - - PowerPoint PPT Presentation

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NDNS: DNS in NDN Alex Afanasyev, Yukai Tu, Xiaoke Jiang, Lixia - - PowerPoint PPT Presentation

Nov 09, 2022 256 likes •379 views

NDNS: DNS in NDN Alex Afanasyev, Yukai Tu, Xiaoke Jiang, Lixia Zhang, and others Overview 2 NDN needs DNS-like system Map names to names (e.g., to scale routing [1]) n Some names can be reached directly (in FIB) and some need to be mapped

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SLIDE 1

NDNS: DNS in NDN

Alex Afanasyev, Yukai Tu, Xiaoke Jiang, Lixia Zhang, and others

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SLIDE 2

Overview

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¨ NDN needs DNS-like system ¤ Map names to names (e.g., to scale routing [1])

n Some names can be reached directly (in FIB) and some need to be mapped to

reachable

¤ Always-on storage to save and lookup keys

n Data production & consumption in NDN is asynchronous

¨ Data-centric design at the networking level require special

considerations

¤ Namespace design to allow use of in-network caches and realize per-

packet data security

[1] A. Afanasyev, C. Yi, L. Wang, B. Zhang, and L. Zhang, "SNAMP: Secure Namespace Mapping to Scale NDN Forwarding," in Proceedings of 18th IEEE Global Internet Symposium (GI 2015), April 2015.

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SLIDE 3

NDNS Overview

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¨ Domain = NDN name ¨ Resource Record ¤ Information associated with domain ¨ Zone ¤ Dataset containing records

associated with NDNS domain

¨ Authoritative Server ¤ Data storage for an NDNS zone ¨ Caching Resolver ¤ Helper to discover domain record ¨ Stub Resolver ¤ Client module for record discovery

/ /edu /net ... /net/ndnsim /net/ndnsim/www ... Name servers (authoritative) caching resolvers Stub resolvers NDNS name space /net/ndnsim/docs zone (authority) /net/ndnsim/docs NDN in-network storage (caches)

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SLIDE 4

NDNS Design Space

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¨ Replicate DNS protocol exactly ¤ DNS is data-centric, but at app-level ¤ Tradeoffs ¨ Designing natively data-centric NDNS ¤ Data-centricity at the network-level ¤ Tradeoffs

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SLIDE 5

Replicating DNS (DNS)

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Stub Resolver net zone 192.5.6.30 192.33.14.30 Root zone 192.203.230.10 198.41.0.4 8.8.8.8 NDNS

/NDNS/... /net/ndnsim/NDNS/

  • (!) Interest is a question not to the

server, but to the network

  • (?) In principle, can do point-to-point,

but what could be the “name” of one

  • f an NDNS zone?
  • (!) Make NDNS servers be transparent

“zone owners”

/net/NDNS/... /google/NDNS-R/ ? www.ndnsim.net TXT

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SLIDE 6

Replicating DNS (NDNS)

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Stub Resolver net zone /net/NDNS /net/NDNS Root zone /NDNS /google/NDNS-R

? www.ndnsim.net TXT

NDNS

/NDNS/... /net/ndnsim/NDNS/

  • (!) Interest is a question not to the

server, but to the network

  • (?) In principle, can do point-to-point,

but what could be the “name” of one

  • f an NDNS zone?
  • (!) Make NDNS servers be transparent

“zone owners” / service providers

/net/NDNS/... /google/NDNS-R/

/NDNS NDNS NDNS NDNS NDNS NDNS

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SLIDE 7

Transforming DNS Query to NDN Interest (Option 1)

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Stub Resolver net zone /net/NDNS /net/NDNS Root zone /NDNS /google/NDNS-R

? www.ndnsim.net TXT

/NDNS NDNS NDNS NDNS NDNS NDNS /google/NDNS-R/net/ndnsim/www/TXT /NDNS/net/ndnsim/www/TXT /net/NDNS/net/ndnsim/www/TXT

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SLIDE 8

Transforming DNS Query to NDN Interest (Option 2)

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Stub Resolver net zone /net/NDNS /net/NDNS Root zone /NDNS /google/NDNS-R

? www.ndnsim.net TXT

/NDNS NDNS NDNS NDNS NDNS NDNS /google/NDNS-R/net/ndnsim/www/TXT /NDNS/net/NS /net/NDNS/ndnsim/NS /net/ndnsim/NDNS/www/NS /net/ndnsim/NDNS/www/TXT

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SLIDE 9

Selected for recursive NDNS query

Design Option Tradeoffs

¨ NDNS server can fully utilize its internal

cache to return the requested record or next-level referral

¨ NDN sends query to the closest/available

NDNS zone replica

¨ NDNS servers create response on the fly,

e.g., encapsulating original record(s)

¨ Strict reliance on caching resolvers to scale

system

¨ NDN sends query to the closest/available

NDNS zone replica

¨ NDNS servers serve static responses ¨ Full use of NDN caches / scales

independent whether caching resolvers exist or not

¨ NDNS servers cannot fully utilize caches, as

the real question is not known

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/NDNS/net/ndnsim/www/TXT /net/NDNS/net/ndnsim/www/TXT /NDNS/net/NS /net/NDNS/ndnsim/NS /net/ndnsim/NDNS/www/NS /net/ndnsim/NDNS/www/TXT Selected for iterative NDNS query

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SLIDE 10

NDNS Lookup Overview

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App Stub resolver Remote DNS server Remote DNS server NDNS name server App User app Caching NDNS resolver recursive queries. e.g.:

  • /NDNS-R/net/ndnsim/www/TXT

iterative queries. e.g.:

  • /NDNS/net/NS
  • /net/NDNS/ndnsim/NS
  • /net/ndnsim/NDNS/www/NS
  • /net/ndnsim/NDNS/www/TXT

NDN cache NDN cache End-host library calls

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SLIDE 11

Questions

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