IPv6 u kablovskim mrežama - Cisco · Divert Rate Limit Yes/PXF Yes Packet Intercept –MAC address tapping Yes/PXF Yes IPv6 CMTS Subscriber database HA & DCC Yes/PXF Yes MPLS 6PE

1© 2010 Cisco and/or its affiliates. All rights reserved.

IPv6 u kablovskim mrežamaDjordje Vulovic, Systems Engineer, CCIE #16582


Strategije za uvoĎenje IPv6 u kablovskim mrežama

© 2010 Cisco and/or its affiliates. All rights reserved. 3

• Rešiti problem nedostatka javih IPv4 adresa

• Proširiti IPv6 DOCSIS servise

• Ispitati razne opcije za IPv4-IPv6 koegzistenciju (tuneliranje, translacija)

• Posmatrati ostale servis provajdere

• Pronaći najoptimalnije rešenje za uvoĎenje IPv6

TipičnaIPv6

strategija kablovskih operatera


IPv4 i IPv6 koegzistencija (Dual Stack - DS)

• IPv4 /IPv6 prosleĎivanje odmah od CPE-a (i kablovskog modema)

• Podrazumeva mrežu spremnu i za IPv4 i za IPv4

• Najjednostavniji scenario

IPv4 preko IPv6 mreže

• Tuneliranje izmeĎu dual-stack CM/rutera i DS-Lite koncentratora

• Podrazumeva samo IPv6 mrežu

• Pogodan za kasniju fazu uvoĎenja IPv6


• Tuneliranje izmeĎu dual-stack CM/rutera i 6rd koncetratora


• Zahteva promena na CM/ruteru i graničnom ruteru


• Tuneliranje izmeĎu dual-stack CPE/hosta i 6rd koncetratora


• Zahteva promena na CPE/host OS-u i graničnom ruteru

IPv6 <-> IPv4 translacija

• Translacija adresne familije na granično m ruteru

• Pretpostavlja samo IPv6 mrežu

• Zahteva razvoj ALG-ova


• Tehnička superiornostuključuje:

Skaliranje/performanse

Čuvanje IPv4 adresa

Kompleksnost

Cenu

• Jednostavnost primene uključuje:

Promene u mreži

Promene CMTS softvera

Promene CM ili CPE-a

Promene DOCSIS back-end sistema

Tehnička superiornost

Je

dn

osta

vn

os

t p

rim

en

e

Velika

VelikaMala

1

1 Dual-Stack

6RD

DS-Lite

6RD+

NAT64


CESNA 3.2


IPv6 u DOCSIS standardizaciji


• Članovi CableLabs-a su postavili IPv6 u razmatranje za DOCSIS 3.0

Cisco je odgovorio sa predlogom za IPv6 arhitekturu i funkcionalnostima

IPv6 je bio meĎu tri najvažnija kandidata za DOCSIS 3.0 funkcionalnosti

• Rezulat: DOCSIS 3.x MORA potpuno podržavati IPv6

• Razlozi za ovakvu odluku:

Povećan adresni prostor za upravljanje CM-ovima

CPE servisi

• Predložene faze:

Faza 1 – upravljanje modemima preko IPv6; IPv6 ruter

Faza 2 – ostale IPv6 funkcionalnosti za CPE servise


• Pretplatnik će imati mrežu, ne pojedinačne CPE-ove priključene na HFC

Korisnik treba da dobije prefiks veći od /64 (npr /48, /56 itd) za pod-delegaciju u svojoj mreži

• CM mogu biti upravljani isključivo kroz IPv6

Korisnik i dalje može dobijati IPv4 servis

• HFC može imati poseban prefiks za upravljanje modemima i CPE opremom odnosno poseban prefiks za Internet servis

• Za dodeljivanje adresa koristi se DHCPv6 da bi se ispunili zahtevi operatera za kontrolom adresa

• Polja, opcije i podopcije iz DHCPv4 su redefinisane kao vendor-specific opcije u DHCPv6


CORETo

InternetHOME /

SMB

HOME /

SMB

CMTSrouter

HFCCM2

bridge

Management prefix: 2001:DB8:FFFF:0::/64

Service prefix: 2001:DB8:FFFE:0::/64

Customer 2 prefix: 2001:DB8:2::/48

Customer 3 prefix: 2001:DB8:3::/48

HFC link; assigned 2001:DB8:FFFF:0::/64 (mgmt) and 2001:DB8:FFFE:0::/64 (service)

Customer 2 premises link; assigned 2001:DB8:2:1::/64

Customer 3 premises link; assigned 2001:DB8:3:1::/64

Access model 1

Access model 2

Access model 3

CPE1

CPE2

CPE3

CPErouter

CMrouter

MSO admin domainCustomer admin domain

Servers• DHCP, DNS• TFTP• TOD• Management

DOCSIS 3.x IPv6Reference Architecture

CM1bridge


CMrouter

HFC link; assigned 2001:DB8:FFFF:0::/64 (mgmt) and 2001:DB8:FFFE:0::/64 (service)

Customer 3 premises link 0; assigned 2001:DB8:3:0::/64



CPE

CPE

CPE

CPE

CPE

wirelessaccess point

ethernetbridge

CM router receives 2001:DB8:3::/48

through prefix delegation; assigns /64

prefixes from 2001:DB8:3::/48 to

customer network links

CMTSrouter

HFC

Home/SMB

Network

Access Model 3 – Zoom In View

MSO admin domain

Customer admin domain

DOCSIS 3.x IPv6Reference Architecture


• DOCSIS 3.0 uvodi novu MDD (Mac Domain Descriptor) poruku

• Na primarnim DS kanalima MDD poruka sazdrži MDD zaglavlje i kao skup TLV-ova i pod-TLV-ova

Na neprimarnim kanalima sadrži ID primarnih DS kanala

• MDD sadrži informacije poput:

Spiska DS kanala

Topologiju servisne grupe odnosno optičkog čvora koja je konfigurisana na CMTS-u

Tip IPv4/IPv6 provisioning-a

Mod može biti promenjen varijablom saMddIpModeOverride u CM konfiguraciji


CESNA 3.2

SLOT 1: Mar 29 17:44:26.279: Cable1/0: size 274 mdd_tlv_size 244 num_frag 1 seq_num 1

test_mdd_tlv_length 0

SLOT 1: Mar 29 17:44:26.279: Cable1/0 MDD datagramsize 274, msg len 272, ehdr type_or_len

254, tlv_size 244 max_pak_size 1518

SLOT 1: Mar 29 17:44:26.279: MDD MESSAGE

...

SLOT 1: Mar 29 17:44:26.279: MDD TLV

SLOT 1: Mar 29 17:44:26.279: Downstream Active Channel List

SLOT 1: Mar 29 17:44:26.279: Channel ID: 1

SLOT 1: Mar 29 17:44:26.279: Frequency: 466000000Hz

SLOT 1: Mar 29 17:44:26.279: Modulation Order/Annex: 256 QAM/Annex A

SLOT 1: Mar 29 17:44:26.279: Primary Capable: Primary-Capable

...

SLOT 1: Mar 29 17:44:26.279: MAC Domain Downstream Service Group

SLOT 1: Mar 29 17:44:26.279: MD-DS-SG ID: 1

SLOT 1: Mar 29 17:44:26.279: Channel IDs: 1

SLOT 1: Mar 29 17:44:26.279: 2

SLOT 1: Mar 29 17:44:26.279: 3

SLOT 1: Mar 29 17:44:26.279: 4

SLOT 1: Mar 29 17:44:26.279: Downstream Ambiguity Resolution Frequency List

SLOT 1: Mar 29 17:44:26.279: Frequencies: 466000000Hz

SLOT 1: Mar 29 17:44:26.279: 474000000Hz

SLOT 1: Mar 29 17:44:26.279: 482000000Hz

SLOT 1: Mar 29 17:44:26.279: 490000000Hz

SLOT 1: Mar 29 17:44:26.279: IP Initialization Parameters

SLOT 1: Mar 29 17:44:26.279: IP Provisioning Mode: IPv4

...


• IPv4-Only

• IPv6-Only

• Alternate Provisioning Mode (APM)

CM prvo koristi protokol (IPv6 ili IPv4) koji je naveden u MDD poruci

Ukoliko primarni mod ne uspe, CM pokušava da iskoristiti drugi protokol

• Dual-Stack Provisioning Mode (DPM)

CM istovremeno pokušava da dobije IPv4 i IPv6 adrese kroz DHCPv4 i DHCPv6

Ukoliko dobije IPv6 adresu i CM pokušava da dobije ToD i konfiguraciju kroz IPv6 protokol

Ukoliko ne uspe prelazi na IPv4 protokol


IPv6 podrška u Cisco CMTS-ovima


• CableLabs DOCSIS 3.0 inter-ops (Jul, December 2006)

Demonstrirana IPv6 interoperabilnost sa referentnim dizajnom (Broadcom) kao i samim kablovskim modemima (Linksys, Scientific Atlanta)

• Partnerstvo sa najvećim servis provadjerima od početka 2006-e godine

Inženjerska verzija CTMS softvera je isporučena vodećem kablovskom operateru za lab test 2006. godine

• Partnerstvo sa SCTE

Kreiranje DOCSIS 3.0 IPv6 treninga za kablovsku industriju

• Bronzana kvalfikacija(2007)

• Produktizacija IPv6 menadžmenta kablovskih modema

• Produktizacija IPv6 CPE servisa

• Uspešan CableLabs DHCPv6-PD test interoperabilnosti


• CableLabs DOCIS 3.0 bronzani nivo saglasnosti za IPv6

• IPv6 bridž CM u single-stack i dual-stack modu

• Dual-stack CPE

• Provera EUI64 polja u link-local adresi

• Jedna DHCPv6 adresa po klijentu (CM or CPE)IPv6 SLAAC nije podržan ni za CM ni za CPE iza CM u bridž modu

• IPv6 implementacije za:cable source-verify cable monitorDMICSyslog

• Show cable modem prikazuje DNS names za IPv6 adrese (ne i za IPv4)

• DOCSIS 3.0 MDF (Multicast DSID forwarding)


CESNA 3.2

CMTS Softversko

IPv6

prosleđivanje

Hardversko

IPv6

prosleđivanje

D3.0 IPv6 CM

podrška

D2.0+ IPv6

CM podrška

uBR10k PRE2/PRE4 PRE4 20x20, 3Gx60,

Wideband SPA

520U/H

uBR7200 NPE-G1/G2 N/A 8x8 28U


CMTS Hardver Tip prosleđivanja

IPv6 paketa

Maks.protok

u pps

Maks. protok u

Mbps

uBR10k PRE2 Softversko 28k 336 @ 1500B paket

uBR10k PRE4 Softversko 65k 780 @ 1500B paket

uBR10k PRE4 Hardversko 4M 15000 @ 420B paket

CMTS Hardver Tip prosleđivanja

IPv6 paketa

Maks.protok

u pps

Maks. protok u

Mbps

uBR7200 NPE-G1 Softversko 192k 1200 @ 800B paket

uBR7200 NPE-G1 Softversko 640k 2750 @ 800B paket


• 12.2(33)SCA/12.2(33)SCB

Softversko prosleĎivanje IPv6 paketa (“punt path”)

Podrška za IPv6 DOCSIS funkcionalnosti

Podrška za menadžment kablovskih modema preko IPv6

Podržška za OSPFv3, IS-IS za IPv6, MP-BGP, RIPng

• 12.2(33)SCC

Dual-stack CPE (za testne svrhe)

Podrška za APM/DPM CM

• 12.2(33)SCE

Hardversko prosleĎivanje (PXF) IPv6 paketa na PRE-4

IPv6 CMTS baza pretplatnika HA & DCC


IPv6 Feature PRE4 ubr7200

Host database Yes Yes

ACLs Yes Yes

Virtual bundles Yes Yes

Subinterfaces Yes Yes

Cable Monitor (no ACL support) Yes Yes

DMIC Yes Yes

BPI+ Yes Yes

IPv6 multicast for control plane Yes Yes

Cable source verify Yes Yes

DOCSIS state machine including MDD Yes Yes

MDD config per interface Yes Yes

LLA EUI-64 verification during CM registration Yes Yes



Cable CLIs impacted by IPv6 Yes Yes

Ping and other CLI commands using hostnames Yes Yes

FQDN (or hostnames) display in CLIs Yes Yes

DAD detection at the CMTS and logging Yes Yes

ISIS support Yes Yes

Punt path support on 10k with rate limit Yes N/A

DHCPv6 relay agent options Yes Yes

Cable-specific MIB support Yes Yes

Generic IPv6 MIB support Yes Yes

Retrieval of IPv6 MIBS over IPv4 Yes Yes

Syslog over IPv6 Yes Yes

DPM and APM (D3.0 gold features) for CM Yes Yes

Dual Stack CPE (Win Vista SP2) Yes Yes



IPv6 unicast forwarding Yes/PXF Yes

Security ACL Yes/PXF Yes

MQC QoS Yes/PXF Yes

DOCSIS DS QoS Yes/PXF Yes

Cable source verify Yes/PXF Yes

IPv6/IPv4 GRE Tunnel Yes/PXF Yes

Divert Rate Limit Yes/PXF Yes

Packet Intercept – MAC address tapping Yes/PXF Yes

IPv6 CMTS Subscriber database HA & DCC Yes/PXF Yes

MPLS 6PE (12.2(33)SCF) Yes/PXF Yes

MPLS 6VPE (12.2(33)SCF) Yes/PXF Yes

IPv6 Multicast Forwarding Yes/RP Yes

Policy Based Routing Yes/RP Yes


IPv6 podrška u Cisco kablovskim modemima/ruterima


PRODUCT Cablemodem EMTA (NCS) EMTA (SIP) EDVA (PC2.0) RG CPE

DPC2100

EPC2100

IPv6

San Antonio -

100615

N/A N/A N/A N/A IPv6**

DPC2203/C/C2

EPC2203

IPv6

Phoenix 2B -

090811

IPv4 only

Phoenix 2B -

090811

IPv4 only IPv6

San Pedro -

TBD

N/A IPv6**

DPC2325

EPC2325

IPv6

Nikambu -

100601

N/A N/A N/A IPv4

IPv6 FW –

Q3 CY11

IPv4

IPv6 ***

DPC2425/DPQ2425

EPC2425

D/EPC2434

IPv6

Nikambu -

100601

IPv4 only IPv4 only IPv6

San Pedro -

TBD

IPv4

IPv6 FW –

Q3 CY11

IPv4

IPv6***

DPR2325

EPR2325

IPv4 only N/A N/A N/A IPv4 only IPv4 only

DPR2320

EPR2320

IPv4 only N/A N/A N/A IPv4 only IPv4 only


FEATURES SUPPORTED

PRODUCT DOCSIS

VERSION

IPv6 Dual

Stack

Support

APM/DPM

(Alternate

& Dual

Provisioning

Mode)

MDF

(Multicast

DSID

Forwarding

)

Software

Upgrade

over IPv6

SNMP

over

IPv6

Telnet

& SSH

over

IPv6

Web-

Pages

over

IPv6

eRouter

DPC2100

EPC2100

2.0 Yes Yes Yes

(MDF=0,1)

Yes Yes No Yes NA

DPC2203

DPC2203C/

C2

EPC2203

2.0 Yes Yes Yes

(MDF=0,1)

Yes Yes Yes Yes NA

DPC2325

EPC2325

2.0 Yes Yes Yes

(MDF=0,1)

Yes Yes Yes Yes Yes

Q3 CY11

DPQ/C2425

EPC2425

DPC2434

EPC2434

2.0 Yes Yes Yes

(MDF=0,1)

Yes Yes Yes Yes Yes

Q3 CY11

DPR2325

EPR2325

2.0 No No No No No No No No

DPR2320

EPR2320

2.0 No No No No No No No No


PRODUCT Cablemodem EMTA (NCS) EMTA (SIP) EDVA (PC2.0) RG CPE

DPC3000

EPC3000

IPv6

Eastlake 1A –

100329


DPC3010

EPC3010

IPv6

Riverpines -

100511


DPC3212

EPC3212

IPv6

Savannah –

100503

IPv4 only

Savannah –

100503

IPv4 only

Albany -

100503

IPv6

FW-TBD

N/A IPv6**

DPC3825

EPC3825

IPv6

St.Ives –

100601

N/A N/A N/A IPv6***

Pinehurst -

101220

IPv6***

DPC3925

EPC3925

IPv6

St.Ives -

100601

IPv4 only

St.Ives -

100601

IPv4 only

St.Ives -

100601

IPv6

FW-TBD

IPv6***

Pinehurst-

101220

IPv6***


FEATURES SUPPORTED

PRODUCT DOCSIS

VERSION

IPv6 Dual

Stack

Support

APM/DPM

(Alternate &

Dual

Provisioning

Mode)

MDF

(Multicast

DSID

Forwarding)

Software

Upgrade

over IPv6

SNM

P

over

IPv6

Telnet &

SSH over

IPv6

Webpages

over IPv6

eRouter

DPC3000

EPC3000

3.0 Yes Yes Yes

(MDF=0,1,2)

Yes Yes Yes Yes NA

DPC3010

EPC3010

3.0 Yes Yes Yes

(MDF=0,1,2)

Yes Yes Yes Yes NA

DPC3212

EPC3212

3.0 Yes Yes Yes

(MDF=0,1,2)

Yes Yes Yes Yes NA

DPC3825

EPC3825

3.0 Yes Yes Yes

(MDF=0,1,2)

Yes Yes Yes Yes Yes*

DPC3925

EPC3925

3.0 Yes Yes Yes

(MDF=0,1,2)

Yes Yes Yes Yes Yes*


Cisco CESNA dizajn rezidencijalnog IPv6 Internet servisa


• Prošire IPv6 preko DOCSIS pristupa

• Shvate razlike i izazove IPv6 arhitekture

• Iskoriste CGN44

• Iskoriste nove funkcionalnosti na CMTS-ovima i CM-ovima

• Predloži i testira najzgodniji dizajn IPv6 servisa

CESNA treba da pomogne

kablovskim operaterima

da:


Aggregation Network

Access/Hub

ASR9K/7600

uBR10/7K

Business

Backbone Network

ASR9K/

7600

CRS-1Router

STB

CM/

eMTA/

eRouter

ASR9K/7600

ISR

CRS-1Router

H

F

C

CRS-1Router

CRS-1Router

CPE

Regional Network

CRS-1Router

7600/ ASR9K

7600 or CRS or ASR9K

SDC (System/Div)

Video Complex

Voice Complex

Network Mgt Complex

IP Security Complex

SDC (Regional)

Video Complex

DPI

SDV VoD

PEG DS/DB

SDC (National)

Video Complex

Voice Complex

Network Mgt Complex

IP Security Complex

ME3400

HR

HR AR

AR

BR

BRBR

BRCR

CR

CR

CR

FT

TP

HF

C

7600/ ASR9K

7600/ ASR9K

L2VPN CM

HF

C

SDC

SDC (Local)

SRSRSRSRSRSR

EQAM

PE

PE

Residential



• Zasnovan na dual-stack principu

Optimalne performanse zahvaljući čistom IP prosleĎivanju (bez tunelovanja) na PRE-4 i 12.2(33)SCE

Optimalno ponašanje OS-a i aplikacija zasnovano na RFC3484 (Default Address Selection)

• Testirane opcije:

CM bridž (Mgt=IPv4; CPE=IPv4/IPv6)

CM bridž (Mgt=IPv6; CPE=IPv4/IPv6)

CMTSAR or CR

IP/MPLSPublic IPv4Subscribers

Internet

IPv4

Internet

IPv6IPv4+ IPv6Subscribers


CESNA 3.2

128 bits

16 bits

64 bits=Interface-id

16 Interface subnets on each device

256 Access Building Blocks

256 Aggregation Building Blocks (including backbone)

16 Services

2EDC: BA98:SRMR:HDPI: XXXX: XXXX: XXXX: XXXX

16 Type of IP Devices i.e. CMTS, QAM etc.**

16 Number of devices for each type

R= Region

M= Division

0=Infrastructure; 1=HSD;

2=VoD; 3=VoIP; 5=NM;

5=Video;6=Commercial..

R=Ring (0= H&S)

H=Hub

0=p2p router link;

1=Router loopback;

2=CPE; 3=QAM; ....

0 = SDC; 1-15 could

be used in anyway.


• Interfejsi izmeĎu rutera su ili /127 ili /64 sa EUI

• CM/bridž i CPE-ovi iza njega dobijaju adresu iz /64 prefiksa

• CM/eRouter dobija /56 prefiks za dodeljivanje CPE-ovima iza njega

• CMTS oglašava CM i CPE prefiks preko BGP-a


Korisni linkovi


• CableLabs IPv6 Primer

http://www.cablelabs.com/cablemodem/ipv6/

• DOCSIS® 2.0 + IPv6 Cable Modem Specification

http://www.cablelabs.com/specifications/CM-SP-DOCSIS2.0-IPv6-I03-110210.pdf

• Comcast IPv6 Information Center

http://www.comcast6.net/

• Cisco Carrier-Grade IPv6 Solution

http://www.cisco.com/en/US/netsol/ns1017/networking_solutions_solution_category.html

http://www.cablelabs.com/cablemodem/ipv6/












http://www.comcast6.net/



Thank you.

Documents

IPv6 u kablovskim mrežama - Cisco · Divert Rate Limit Yes/PXF Yes Packet Intercept –MAC address tapping Yes/PXF Yes IPv6 CMTS Subscriber database HA & DCC Yes/PXF Yes MPLS 6PE