modul 2 aplikasi berbasis ipv6

8/10/2019 Modul 2 Aplikasi Berbasis IPv6

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IPv6 Lanjut

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, . .

Lab. Komunikasi Digital

e ung 4 . 1EEPIS-ITS



Deployment scenarios

Many ways to deliver IPv6 services to End Users

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Most important is End to End IPv6 traffic forwarding Service Providers and Enterprises may have different

ep oyment nee s

IPv6 over IPv4 tunnels e ca e a a n ayers or na ve v

no impact on IPv4 traffic & revenues

IPv6 over MPLS or IPv4-IPv6 Dual Stack Routers



Media - Interface Identifier

IEEE interfaces - EUI-64

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MAC-address: 0050.a218.0c38 Interface ID: 250:A2FF:FE18:C38

P2P n s HDLC, PPP

Interface ID: 50:A218:C00:D interface index.

IPv4 tunnels

Interface ID: ::a.b.c.d



ICMP Informational Messages

Echo request & reply (same as IPv4)

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Multicast listener discovery messages:query, report, done (like IGMP for IPv4):

Type Code Checksum

Multicast Address



Neighbor Discovery

ICMP message types:

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rou er so c a on router advertisement neighbor solicitation neighbor advertisement redirect

Functions performed: router discovery

pre x scovery autoconfiguration of address & other parameters duplicate address detection (DAD) neighbor unreachability detection (NUD) link-layer address resolution first-hop redirect



Neighbor Discovery Messages Router advertisements

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-

scope) Router solicitations

- , .

sent to all-routers multicast address (link scope)

Neighbor solicitations or a ress reso u on: sen o so c e no e mu cas a r.

for unreachability detection: sent to neighbor’s unicast addr.

Neighbor advertisements

or a ress reso ut on: sent to un cast a ress o so c tor for link-layer address change: sent to all-nodes multicast addr.

usable for proxy responses (detectable)

nc u es router ost ag



Serverless Autoconfiguration

“Plu -n-Pla ”

Hosts generally will construct addresses from RA:

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su net pre x es earne rom per o c mu t cast a vert sements

from neighboring router(s) interface IDs generated locally

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Other IP-layer parameters also learned from router

adverts (e.g., router addresses, recommended hop limit, etc.) g er- ayer n o (e.g., DNS server and NTP server addresses)

discovered by multicast / anycast-based service-locationprotocol [details being worked out]

DHCP is avai a e or t ose w o want exp icit contro



IPv6 autoconfiguration8



IPv6 autoconfiguration9



IPv4-IPv6 Transition / Co-Existence

wide ran e of techni ues have been identified and

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implemented, basically falling into three categories:(1) Dual-stack techniques, to allow IPv4 and IPv6 to

co-ex st n t e same ev ces an networ s

(2)Tunneling techniques, to avoid order dependencies when

upgrading hosts, routers, or regions

(3)Translation techniques, to allow IPv6-only devices tocommunicate with IPv4-only devices

xpec a o ese o e use , n com na on



Transition environments

Enterprise

WAN: 6to4, IPv6

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Cable6to4 Relay

Dual Stack

,

Residential

Dedicated data link layersDedicated data link layers

IPv6 over IPv4 TunnelsIPv6 over IPv4 Tunnels

ggrega on

Dual Stack or MPLS & 6PEDual Stack or MPLS & 6PEDSL,FTTH,

IPv6 over IPv4 tunnels

6Bone

IPv6 over IPv4 tunnels orDedicated data link layers

Dial

ISP’sISATAP

IPv6 IX

Enterprise



I. Dual-Stack A roach

When addin IPv6 to a s stem do not delete IPv

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this multi-protocol approach is familiar and well-understood (e.g., for AppleTalk, IPX, etc.)

,new OS releases, not an extra-cost add-on

Applications (or libraries) choose IP version to use

,

Prefer scope match first, when equal IPv6 over IPv4

when responding, based on version of initiating packet

- ,app-by-app upgrades to IPv6 usage



Dual Stack Approach13



Dual Stack & DNS14



Sample Dual Stack Configuration15



II. Using Tunnels for IPv6 Deployment16



Configured tunnels (Manual)17

3ffe:c00:1::/48 3ffe:c00:2::/48

IPv4

IPv6IPv6

130.67.0.1 148.122.0.1

--------------------------------------

--------------------------------------

IPv4 protocol type = 41



Manually Configured Tunnel (RFC4213)

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Tunnel Broker19



Automatic tunnels

IPv4 Address 32bits)

ISP assi nedDefined

0

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148.122.0.1

. . .

::130.67.0.1::148.122.0.1

IPv4IPv6 IPv6

Connects dual stacked nodes

Quite obsoleteIPv6 Internet



6to4 tunnels

FP 3bits) TLA 13bits) IPv4 Address 32bits) SLA ID 16bits) Interface ID 64bits)

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IPv4 IPv6

: : ::

2002:947A:1::/48

130.67.0.1 148.122.0.1

6to4 prefix is 2002::/16 + IPv4 address.

2002:a.b.c.d::/48 IPv6 Internet6to4 relay

11.0.0.1

: : ::

Announces 2002::/16 to the IPv6 Internet



6to4 Relay 23



6to4 in the Internet24



III. NAT-PT for IPv6



NAT-PT Concept



DNS Application Layer Gateway



Linux Webserver28



Linux Nameserver29



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modul 2 aplikasi berbasis ipv6

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