Taxonomy

Laurent Toutain

Sujets

• Liste des personnages d'Astérix le Gaulois
• 6rd
• Teredo (protocole)
• ISATAP
• Union pour la démocratie et le progrès social
• Dynamic Host Configuration Protocol

Informations

• Publié par: Chuwyar
• Nombre de lectures: 54
• Langue: English
• Poids de l'ouvrage: 2 Mo

Extrait

Taxonomy  Core network « transition/integration » – Tunnels, MPLS, 6PE – Study case VTHD  ISP Transition – 6to4, Tunnel Broker  Site « transition/integraton » – ISATAP, Teredo, NAT-PT  Host « transition/integration » – DSTM, Bump in the *, SOCK, ALG – Advanced API G6 Tutorial 1Problem for core network  How to cross a router speaking only IPv4  Software problem  Hardware problem G6 Tutorial 2Core network transition  tunnels : – The oldest transition technique – Encapsulation of an IPv6 packet inside an IPv4 packet – Packet use IPv4 routing to reach a destination – Problems : • IPv4 addresses choice – Given once by configuration => overlay network » May lead to complex and strange routing » Too easy to create links, so a lot of connectivity G6 Tutorial 36bone Create a virtual topology over the IPv4 network with configured tunnels G6 Tutorial 4Used by the 6bone End of 6bone network the 6/6/6 G6 Tutorial 5Tunnels and High speed network  Useful to cross non IPv6 routers  But: – Software processing for encapsulation may reduce performances. – MTU may be reduced. – Physical topology must be kept at the logical level. G6 Tutorial 6MPLS  Instead of adding an IPv4 header, use MPLS (level 2,5).  MPLS : Multi Protocol Label Switching – Independent of layer 2 (ATM, PPP, Frame Relay,…) – Independent (mostly) of layer « 3 » (IPv4, IPv6, IPX, MAC,…)  MPLS add a label between L2 and L3 – This label is used to relay the packet inside the network G6 Tutorial 7MPLS (2) NIVEAU 3 MPLS int1/567=>int2/789 NIV2 NIV2’ niv2’/789/niv3niv2/567/niv3 G6 Tutorial 8MPLS (3) – Simple solution IPv6 IPv6 L1/IPv6 L2/IPv6 IPv6A B C D •Constraint : Need to configure manually label table in B/C and D. G6 Tutorial 96PE  IPv6 provider Edge – More complex – Associate to routing protocols – Allow to cross large IPv4 clouds G6 Tutorial 10