Irish IPv6 Task Force - Irish IPv6 Task Force IPv6 Deployment & Strategy.
IPv6
description
Transcript of IPv6
IPv6
Dece IPv6
• Cei 32 de biti ai IPv4 limiteaza marimea Internetului.
• Este limitata de asemenea ierarhia Internetului.• Explozia tabelelor de rutare.• Usurinta configurarii.• Securitatea
Adrese IPv6
• Lungimea unei adrese 128 biti– Se pot adresa 340.282.366.920.938.463.374.607.431.768.211.456 de
hosturi
• Reprezentarea adreselor– FFDC:BA98:7654:3210:FEDC:BA98:7654:3210
– 1080:0000:0000:0000:0008:0800:200C:417A
Adrese IPv6• Concatenarea adreselor
– 1080:0000:0000:0000:0008:0800:200C:417A
– 1080::8:800:200C:417A
sau
– 1080:0000:0000:3245:0000:0000:200C:417A
– 1080::3245:0:0:200C:417A
sau
– 0000:0000:0000:0000:0000:0000:0000:0001
– ::1
sau
– 0000:0000:0000:0000:0000:0000:0000:0000
– ::
Adrese IPv6
• Adrese in retele mixte IPv4/IPv6– X:X:X:X:X:X:d.d.d.d
Alocarea adreselor IPv6
• 85% nealocat
Alocare Prefix Utilizare
Aggregatable global unicast 001 12,50%
Link-local addresses 1111 1110 10 0,10%
Site-local addresses 1111 1110 11 0,10%
Multicast addresses 1111 1111 0,40%
Alocarea adreselor IPv6Primii digiti
• 00 Nespecificat, loopback, compatibil IPV4
• 2 Aggregatable global unicast • 3 Aggregatable global unicast (6bone) • FE8 Link local
• FEC Site-local
• FF Multicast
Structura adreselor
• Un nou tip de agregabilitate– La nivel de provider (vechi)
– La nivel de exchange. (NAP)• La nivel layer 2 + arbitru de rute (route arbitrer)
• Adrese agregabile:– Publice
– Site
– Interfata
Hierarhia
ISP1 ISP3
ISP2 ISP4X1X2
S1 P1 P2S2
S3 S4 S5
Public
Site
Hierarhia
• Top level – Zona “default free”
• Toate routerele cunosc “toata” topologia Internet
• Nu exista ruta default
• Site level• Local, organizati, ISP mic.
• Interfata• Nodurile dintro retea
Formatul adresei IPv6
• FP - format prefix
• TLAD ID- identificator de top-level agregator
• RES - rezervat
• NLA ID - identificator de next-level agregator
• SLA ID - identificator de site-level agregator
• Interface ID
FP
TLA
ID
RES NLAID
SLAID
Interface ID
Topologie publicaTop.
Site
Identificator de interfata
Headerul IPv6
• Scopul IPv6 este sa fie imbunatatit headerul IPv4
– Mai simplu
– Flexibil
– Eficient
• Adresa este de 4 ori mai lung
• Headerul este de numai 2 ori mai lung
Formatul headerului IPv60 31
Version Class Flow Label
Payload Length Next Header Hop Limit
128 bit Source Address
128 bit Destination Address
4 12 2416
Formatul headerului IPv40 31
Ver IHL Total Length
Identifier Flags Fragment Offset
32 bit Source Address
32 bit Destination Address
4 8 2416
Service Type
Options and Padding
Time to Live Header Checksum Protocol
Modificari in header
• Retrase Campul Fragmentation scos din headerul de baza Optionile IP scos Header Checksum eliminat Campul Header Length eliminat
• Rescrise Time to Live ’ Hop Limit Protocol ’ Next Header Precedence & TOS ’ Traffic Class Addresa creste de la 32 bit ’ 128 bit
• Adaos Campul Flow Label
Rutare IPv6
• RIPv2
• BGP4+
• OSPF & ISIS cu update pentru IPv6
BGP4+
• Suport pentru IPv6 “address-family”
• Transport IPv6
• Ruleaza sub acelasi proces cu BGP4 – suport pentru un singur AS
• Toate functiile generice implementate ca din IPv4
IPv4-IPv6Coexistenta / Tranzitie
Q1
Q2
Q3
Q4
2007Q1
Q2
Q3
Q4
2004Q1
Q2
Q3
Q4
2003Q1
Q2
Q3
Q4
2000Q1
Q2
Q3
Q4
2001Q1
Q2
Q3
Q4
2002Q1
Q2
Q3
Q4
2005Q1
Q2
Q3
Q4
2006
• Consumer adoption <= Duration 5+ years
• Application porting <= Duration 3+ years
• Early adopter
=>
=>
• Enterprise adoption<= Duration 3+ years =>
=>adoption <= Duration 3+ years• ISP
Implementare
• Pe bucati de la capete– Migratia nucleului doar dupa ce exista o cerere
semnificativa de la clienti– Dual-stack
Impedimentele adoptarii IPv6
• APLICATIILE– Portarea aplicatiilor pentru suport IPv6
Medii de testare
• 6bone. » www.6bone.net
• M6bone » www.m6bone.net