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Page 1: Infrastruktura služeb v EPN - cisco.com · QOS Downstream Challenge 100M 100M 10M Egress policer per VLAN/user 20M 50M 50M No control how much traffic each ONT gets GPON needs BNG
Page 2: Infrastruktura služeb v EPN - cisco.com · QOS Downstream Challenge 100M 100M 10M Egress policer per VLAN/user 20M 50M 50M No control how much traffic each ONT gets GPON needs BNG

Infrastruktura služeb v EPN TECH-SP-4

Martin Slinták, Systems Engineer

Page 3: Infrastruktura služeb v EPN - cisco.com · QOS Downstream Challenge 100M 100M 10M Egress policer per VLAN/user 20M 50M 50M No control how much traffic each ONT gets GPON needs BNG

Cisco and/or its affiliates. All rights reserved. TECH-SP-4 Cisco Public

Agenda

EPN Services Architecture

Service Edge Deployment Models & Innovations

3

Page 4: Infrastruktura služeb v EPN - cisco.com · QOS Downstream Challenge 100M 100M 10M Egress policer per VLAN/user 20M 50M 50M No control how much traffic each ONT gets GPON needs BNG

EPN Services Architecture

Page 5: Infrastruktura služeb v EPN - cisco.com · QOS Downstream Challenge 100M 100M 10M Egress policer per VLAN/user 20M 50M 50M No control how much traffic each ONT gets GPON needs BNG

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Services Architectures

Integrated BNG, WAG, SecGW, CGN Virtualized PGW

Virtualized RR, PCRF, CPEs

Virtualized Network Services

• Business Services

• MEF CE 2.0 services

• L3 VPN enterprise services

• Residential Services

• Mobile Transport

• AnyG

• Adaptive Microwave Coding

5

Page 6: Infrastruktura služeb v EPN - cisco.com · QOS Downstream Challenge 100M 100M 10M Egress policer per VLAN/user 20M 50M 50M No control how much traffic each ONT gets GPON needs BNG

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Service Infrastructure Enhancements

New in this release

Integrated BNG, WAG, CGN

VNFs: vRR, QvPC-SI, QvBN,VXLAN GW,

vBRAS Cloud Policy and NMS

Ke

y H

igh

lig

hts

• Cost effective migration of BRAS functionality from Physical to virtual BRAS in Cloud

• Subscriber redundancy over any access with BNG SRG

• Efficient and Effective resource utilization with nV multicast offload

• Rapid deployment, management simplicity, for MEF Services with ZTD NID

• Improved Netflow based Cellular and Mobile Backhaul Network Capacity Planning

• Simplified MPLS VPN Scale Control for LTE and Simplified eNB interface

• Ethernet NID for Small Cell Aggregation

6

Page 7: Infrastruktura služeb v EPN - cisco.com · QOS Downstream Challenge 100M 100M 10M Egress policer per VLAN/user 20M 50M 50M No control how much traffic each ONT gets GPON needs BNG

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Transport Services: MEF MPLS, Ethernet and nV Access Network

M ultiservice

Core Network

Pre-Aggregation Node

ASR-903, RSP2

Aggregation Node

ASR-9000

Large Scale

Aggregation Network

Legacy

Access Network

IP/MPLS Transport

X-Line

Ethernet Port, 802.1q or 802.1ad TDM, ATM IMA E1, STM1

Core Node CRS-3

IP/MPLS Transport

SONET/SDH DWDM, Fiber Rings, H&S, Hierarchical Topology DWDM, Mesh Topology

Aggregation Node

E-LAN VPLS, PBB-EVPN (includes E-TREE) Ethernet Port, 802.1q or 802.1ad

Ethernet P2P, G.8032 Ring

nV,

P2P, Chain, Ring, L2 Fabric

E-LAN VPLS, PBB-EVPN (includes E-TREE)

Ethernet Port, 802.1q

Ethernet 1q/QinQ PWHE Multiplexing per Access Node or per Access Port

X-Line

Ethernet Port, 802.1q TDM, ATM IMA E1, STM1

Access Node

ASR-920, ME-3600

ME-1200

NID

7

Page 8: Infrastruktura služeb v EPN - cisco.com · QOS Downstream Challenge 100M 100M 10M Egress policer per VLAN/user 20M 50M 50M No control how much traffic each ONT gets GPON needs BNG

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E-Tree: H-VPLS Based Solution

Consistent architecture as E-LINE and E-LAN

Access node use spoke PW

E-Tree split-horizon configuration is done on the aggregation node

Leaf UNI

Leaf UNI

Leaf UNI

Root UNI BD

Split-horizon

Leaf UNI

Leaf UNI

Leaf UNI

Root UNI

Split-horizon

No Split-horizon

No Split-horizon

Primary PW

Backup PW

Deployment example 1

Deployment example 2

• Link level failure is protected by LFA

• Aggregation node failure is protected by PW redundancy

Root UNI

BD

BD

8

Page 9: Infrastruktura služeb v EPN - cisco.com · QOS Downstream Challenge 100M 100M 10M Egress policer per VLAN/user 20M 50M 50M No control how much traffic each ONT gets GPON needs BNG

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E-Tree: PBB-EVPN Based Solution

Support multi-root and multi-leaf UNI per each EVI via RT filtering

Root and leaf uni can be mixed on the same PE only if belong to different EVI (different E-TREE instances)

Support multi root and multi leaf UNI

Support mixed root and leaf UNI on the same PE for the same EVI

Support spoke PW (with PW redundancy) as PBB-EVPN Ethernet Segment, as both root and leaf UNI

Root UNI, evi: A

Leaf UNI, evi: B

Root UNI, evi: A

Leaf UNI, evi: B

Leaf UNI, evi: A

Root UNI, evi: B

Leaf UNI, evi: A

Root UNI, evi: B

PBB-EVPN

Current Architecture

Leaf UNI, evi: A

Root UNI, evi: A

Leaf UNI, evi: A

Root UNI, evi: A

PBB-EVPN

Feature Evolution

evi

evi

evi

evi

evi evi

evi evi evi evi

evi evi

Leaf UNI, evi: A

Leaf UNI, evi: A

9

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nV Multicast offload, ELAN VPLS Multicast

Core Network Access Network

Aggregation Network

PAN

CN-ABR

nV Satellite

PAN-SE

CPE

VPLS IGMP receiv er

IGMP snooping

IGMP IGMP

nV Satellite

nV ring

CPE IGMP receiv er

Multicast

Stream from

VPLS core

locally

replicated at

satellite nodes

• Multicast replication offloaded from nV host to satellite • Optimizes bandwidth utilization of the Fabric Links.

• One shared VLAN allocated for the entire VFI; same for unicast and multicast • Assigned as 802.1Q tag to individual subinterfaces (L2 attachments) to each branch. • Multicast Subinterfaces grouped into a common bridge-domain • IGMP snooping enabled on bridge domain to deliver multicast traffic

10

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Enterprise Services L3 VPN

M ultiservice

Core Network

Pre-Aggregation Node

ASR-9001, ASR-903 Remote Fixed Access Node

ME-3600X, ASR-901 Aggregation Node

ASR-9010

Large Scale

Aggregation Network Efficient

Access Network

IP/MPLS Transport

L3 VPN

Ethernet 1q/QinQ PWHE

Core Node

IP/MPLS Transport

xWDM, Fiber Rings DWDM, Fiber Rings, H&S, Hierarchical Topology DWDM, Mesh Topology

Ethernet 802.1q

Ethernet 1q/QinQ PWHE

Aggregation Node

ASR-9001, 9006

Ethernet 802.1q

Optimal Service Edge

MPLS VPN/Multicast VPN (mLDP)

MPLS VPN/Multicast VPN (mLDP)

Ethernet 1q/QinQ Ethernet 802.1q MPLS VPN/Multicast VPN (mLDP)

11

Page 12: Infrastruktura služeb v EPN - cisco.com · QOS Downstream Challenge 100M 100M 10M Egress policer per VLAN/user 20M 50M 50M No control how much traffic each ONT gets GPON needs BNG

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nV Multicast offload, Enterprise mVPN Core Network Access Network

Aggregation Network

PAN

CN-ABR

nV Satellite

PAN-SE

Enterprise A CPE 1

MVPN4 IGMP receiv er

IGMP snooping

PIM/MLDP IGMP

nV Satellite

nV ring

Enterprise A CPE 2

IGMP receiv er

Multicast Stream from MVPN4 core

locally replicated at satellite nodes

NID

NID

Multicast Vlan

Unicast

Vlan

Unicast

Vlan

• Multicast replication offloaded from nV host to satellite

• Optimizes bandwidth utilization of the Fabric Links. • One shared multicast VLAN allocated for entire enterprise VRF; in addition to unicast vlan for each branch

• Assigned as 802.1Q tag to individual multicast subinterfaces (L2 attachments) to each enterprise branch. • Multicast Subinterfaces grouped into a common bridge-domain; BVI interface used for multicast routing over nV network

• IGMP snooping on bridge domain for delivery of enterprise multicast traffic • Intermediate access device (NID) aggregates multicast and unicast VLANs into a single VLAN towards enterprise CPE and vice ve rsa.

• Configured with bridge Domain with Split-horizon groups on multicast and unicast EVCs 12

Page 13: Infrastruktura služeb v EPN - cisco.com · QOS Downstream Challenge 100M 100M 10M Egress policer per VLAN/user 20M 50M 50M No control how much traffic each ONT gets GPON needs BNG

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Virtual Service Interface – Pseudowire Head-end

VLAN VLAN VLAN

VPLS

Internet

VRF

H-QOS

BFD ACL

Netflow

MAC Sec Storm CTL

VLAN rew rite

uRPF

Pseudowire

ESE

Access

Aggregation

Residential

STB

Business

Corporate

Mobile 2G/3G / LTE ASR9000

PE

ME3600 ME3800 ASR903 ASR901 ASR920

MPLS Core

13

Page 14: Infrastruktura služeb v EPN - cisco.com · QOS Downstream Challenge 100M 100M 10M Egress policer per VLAN/user 20M 50M 50M No control how much traffic each ONT gets GPON needs BNG

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Residential Services

Unified MPLS Access Network

M ultiservice Core Network

Large Scale Aggregation Network

Intelligent Services Edge

Core Node

Remote DSLAM ME-4600

Efficient Access Network

EoMPLS Pseudowire EoMPLS PW

IPTV Transport Access Node UNI:

Non Trunk, N:1 or 1:1 VLAN;

IPv 6

IP, PPPoE Sessions

Integrated MAP-T BR

HSI, VoIP, Video unicast Transport

Optimal Service Edge

PWE3 IPv 6

IP, PPPoE Sessions

Integrated MAP-T BR

BNG with PWHE

Fiber, DSL DWDM, Fiber Rings, H&S, Hierarchical Topology DWDM, Mesh Topology

IP/MPLS Transport

IP or L3 VPN over Unified MPLS for 3play Unicast

MPLS (mLDP)

IP/MPLS Transport

Service Edge Node ASR-9000

Service Edge Node ASR-9000

Aggregation Node

ASR-9000 Pre-Aggregation Node

ASR-9001, ASR-903

Aggregation Node

ASR-9001, 9006

MPLS Access Node,

ASR-901, ME-3600

PIMv 4/v6

PIMv 4/v6

IP TV

IP or L3 VPN over Unified MPLS for 3play Unicast

MPLS (mLDP)

14

Page 15: Infrastruktura služeb v EPN - cisco.com · QOS Downstream Challenge 100M 100M 10M Egress policer per VLAN/user 20M 50M 50M No control how much traffic each ONT gets GPON needs BNG

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Egress policer

per VLAN/all users

QOS Downstream Challenge

100M

100M

10M

Egress policer

per VLAN/user

20M

50M

50M

No control how much traffic each ONT gets

GPON needs

BNG to police

each subscriber

to a contract

downstream

MDU

? mbps

ETHERNET

GPON

15

Page 16: Infrastruktura služeb v EPN - cisco.com · QOS Downstream Challenge 100M 100M 10M Egress policer per VLAN/user 20M 50M 50M No control how much traffic each ONT gets GPON needs BNG

BNG Deployment Models

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SP Edge Architecture Candidates

17

Page 18: Infrastruktura služeb v EPN - cisco.com · QOS Downstream Challenge 100M 100M 10M Egress policer per VLAN/user 20M 50M 50M No control how much traffic each ONT gets GPON needs BNG

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Architectural Comparisons

Capital Expenditures

Scalability (Bandwidth/Subscriber, Transport, Policy Control)

Operational Complexity (Troubleshooting, QoS)

Reuse of existing Operations procedures

Service Availability

Traffic Patterns (e.g. P2P, Video content Delivery)

Economically serving areas of differing subscriber density

Service Flexibility

Operational Flexibility

18

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Scalability—Bandwidth per Subscriber/CPS

Multimedia traffic impacts subscriber scalability per system – Bandwidth per subscriber increases to

5–10 Mbps/sub for multimedia services

– Traffic includes HIS including OTT traffic and VoD.

DS/US ratio in Europe about 4:1

Centralized single-edge architectures reach scalability limits

• Centralized architecture larger failure domain (At 100 CPS, it takes 16 minutes to set up 100K sessions)

Clustered, multi-edge or distributed architectures offer better architectural scalability

Avg DS rate (kbps) 2012

Avg DS rate (kbps) 2017

SP1 144 532

SP2 460 1702

SP3 274 1013

SP4 480 1776

SP5 143 529

Average 300 1110

BW

Gbps

Subs

0

20

40

60

80

100

120

140

10

K

20

K

30

K

40

K

50

K

60

K

70

K

80

K

90

K

10

0K

11

0K

12

0K

0,3Mbps

1,1Mbps

19

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Centralized Single-Edge

Distributed Single-Edge

Service Availability

Distributed and clustered architectures typically employ smaller systems

Smaller fault-domains impact fewer subscribers

In-box redundancy can be used to ensure that certain failures are transparent to subscriber sessions

Inter-box redundancy expensive in distributed architecture (nd edge, stdy replication…)

Aggregation

MPLS/IP/Ethernet

Failure Radius

Core

Failure Radius

Core

GEO-REDUNDANCY

20

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Service Flexibility

Increasing requirement for value added services

Single-edge architectures have more flexibility for quad-play services

Distributed architecture more conducive for wholesale

Allocate subscriber to BNG depending on actual load

vBNG and BNG termination on PWHE

21

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BNG Innovations Linecard Based Subscribers

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LC CPU

RP CPU

OSPF

BGP BNG

IO

S

X

R

LC CPU BNG

LC CPU BNG

LC CPU BNG

ASR 9000 BNG Scale Innovation

I

OS

XR

RP CPU

OSPF

BGP

LC CPU

LC CPU

LC CPU

BNG BNG BNG BNG

• Only XR Architecture allows true distribution

of BNG components

• Higher Horizontal scale/ CPS (CP increase with

addition of LC)

• Better Multi-service Scale • Support with existing

shipping HW

• Similar functional behavior

• Co-existent with RP based model

Target Feature Parity between the

models

Session Termination

23

Page 24: Infrastruktura služeb v EPN - cisco.com · QOS Downstream Challenge 100M 100M 10M Egress policer per VLAN/user 20M 50M 50M No control how much traffic each ONT gets GPON needs BNG

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ASR 9000 BNG Scale Innovation

$0,00

$2,00

$4,00

$6,00

$8,00

128K 256k 384k

Cisco RPBased

Cisco LCBased

JNPR

ALU

Price per Subscriber

Sample BoM , does not include Core facing cards

0

1000

2000

3000

4000

5000

6000

7000

128K 256k 384k

Cisco RPbased

Cisco LCbased

Total Power

RP based LC based

IPv4 Only sessions (PPPoE + IPoE) 128k 256k

IPv6 Only sessions (PPPoE + IPoE) 64k 128k

Dual Stack sessions (PPPoE + IPoE) 64k 128k

Sessions/LC 64k 64k

Sessions/NPU/Port 32k 32k

CPS 100 75 x LC

24

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Positioning RP vs LC based subs

RP Based LC Based

Scale 128K Target 512k

CPS ~100(real deployment) Target 600

PW-HE Yes No

pQoS Yes No (RoadMap)

Bundle Support Yes No

Redundancy (nv edge) Yes Via Geo Redundancy in 5.2.2

Service Accounting Yes No (Roadmap)

Access type L2/L3 Yes Only L2

Multicast Yes No*

Both Models can co-exist

* Limited only on MSE full scaled configs.

25

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BNG Innovations Controller Based BNG

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Vision: Software Defined Fixed Mobile Convergence ASR 9000 Evolved Subscriber Management System

Scale SP WiFi Subscriber Management with SDN

– Up to 1 Million Subscriber per ASR9K gateway

– 3K CPS

– Tens of Millions on Cloud Based SDN Controller

Monetize with Cloud Services

– Leverage combined NfV based Services Delivery for Fixed and Mobile Access

– Service Chaining

– Virtualized Service Module for Integrated low-latency NfV functions

ASR 9000 FMC Gateway

SDN API

Elastic Telco Data Center

Common Services for mobile Gi-LAN + Fixed

OCS

HLR

AAA

CGF

Portal

Common Services

DPI

CG

N

WW

W

FW

CD

N

IPS

Load

Balanc

e

Load

Balanc

e

Load

Balanc

e

Load

Balanc

e

PCRF

Customer Group A

Customer Group B

Business Internet

DPI Virus/Malware

Scan

Firewall

NAT

NAT

Firewall Parental Ctrl. NAT

Session

Ctrl

VSM

SDN

PMIP or GTP

RANs

Wireline

Fiber

WiFi

Cable

27

Page 28: Infrastruktura služeb v EPN - cisco.com · QOS Downstream Challenge 100M 100M 10M Egress policer per VLAN/user 20M 50M 50M No control how much traffic each ONT gets GPON needs BNG

BNG Innovations Geo-Redundancy

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ASR 9000 Carrier Class Redundancy Resilient under all Failure Conditions

Link Failure

Linecard Failure

Hardware Failure

Critical Patch

Software Bug

Chasis Failure

• Handled via LAG support with BNG

• LAG is a baseline - Full feature/Scale support

• Handled via LAG support with BNG

• Link Bundle can be across two linecards

• ASR9000 MTBF data shows 99.999% Uptime

• Probability LOW

• With SMU capability, Patches can be done runtime

• BNG feature-sets also support SMU

• Process Restart capability -> Minimize/localize the failure

• Doesn’t impact other processes.

• Power Backups for power failure

• 1:1 Cluster Redundancy , M:N Geo Redundancy

29

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Limitations of Cluster Redundancy

Needs dedicated links between Cluster nodes

– Expensive to provision

– Colocation required due to latency factor does not provide geographical redundancy

– Inter-chassis links are used during normal operation as well

Restricted Access Node Dual-Homing Options

– ANs need to terminate their links to nodes of the same Cluster

– Flexible pairing across multiple routers not possible

Cluster provides redundancy for other services (L2VPN, L2VPN, mVPN…)

Geographical Redundancy across multiple BNG routers overcomes these limitations …

30

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Solution Summary CORE NETWORK INFRA

CPE1 CPE2 CPE3 CPE4 CPE5 CPEN

SRGs configured on BNG routers

in hot-standby or warm-standby

(1:1, N:1, M:N).

BNG sync channel setup between

master & slave just need L3

connectivity

SRG monitor their respective core and

access connectivity to detect failures.

Only the master sets up session

with the CPE and master & slave

both interact with backend servers

(e.g. Radius, DHCP, PCRF, etc.)

Access network design can use any technology

to provide dual-homing of access links within

a SRG to the two BNGs.

Access technology can put the links to the BNGs

in active/standby (e.g. MC-LAG) or active/active

(e.g. OLT ring) mode.

Failure detection and traffic switchover done based

on the technology used – optionally using a fast

heartbeat mechanism with the BNG access link.

ACESS NETWORK INFRA

CPEs are agnostic to redundancy feature

and do not see or do anything special.

They see one BNG and setup sessions with it.

Switchover is done transparently. 31

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Redundancy options

Hot-Standby Mode (aka. Stateful Redundancy)

All session states are synced on Back-up BNG, both software and hardware states.

Data-plane is pre-provisioned with all subscriber instances.

If access and core infra designed for fast convergence, sub-second convergence is achievable.

Warm-Standby Mode (aka. Partial Stateful Redundancy) Minimal session context is created in shadow database.

Hardware states are created from this shadow database, based on trigger.

Sub-second convergence not achievable using this approach

SYNC

32

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Deployment example

SRG1

SRG2

SRG1

SRG3

SRG2

SRG3

1.1.1.1

2.2.2.2

3.3.3.3

4.4.4.4

Gig-0/0/1/2

Gig-0/0/1/2

Gig-0/0/1/2

Gig-0/0/1/2

Gig-0/0/1/0

Gig-0/0/1/1

Gig-0/0/1/0

Gig-0/0/1/1

Gig-0/0/1/0

Gig-0/0/1/0

SUBSCRIBER ACCESS AGGREGATION CORE EDGE

AG

NO

ST

IC

i.e

. M

C-L

AG

, OLT, P

WH

E Could be different

chassis and run

different IOS-XR

33

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Unified MPLS Network

IP

IP

Residential PON Homes

IP

IP

PW E3

G.8032 Ring

Residential DSL Homes

IP

IP

DSL Access

AGN-SE with BNG SRG

PON Access

AGN-SE with BNG SRG

BNG Subscriber Redundancy Group (SRG)

• Subscriber Redundancy Groups (SRGs) between BNGs

• Ensure subscriber states are maintained across BNGs for redundancy

• One SRG per AN; Master and Standby BNG per SRG basis

• Only Master node is responsible for forwarding subscriber traffic.

• Access Node connectivity tracking to detect loss of connectivity and trigger failover

• MPLS access - Programmable logic for MCLAG failover with PW state change

• G.8032 access - MA between each access node and BNG; CFM down MEP over dedicated/residential vlan

• EFD on BNGs to monitor line protocol of ring facing interface

Hub and Spoke

Unified MPLS Network Access PE

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BNG SRG Ethernet Access Node

MCLAG Active/ Standby links or

VLANs

AGN-SE

BNG Node

SR

G

core

Dual Homed

OLT

Active/Standby links

(per link or per VLAN)

• Redundant BNGs at the aggregation site

• Single uplink between AN and each BNG nodes • Uplinks bundled together at BNG in MultiChassis Link Aggregation Groups

• Operate in Active/Standby mode either at port or at individual VLAN level • Subscriber Redundancy Groups (SRGs) running between BNGs

• Ensure subscriber states are maintained across nodes • Only a single node is responsible for forwarding of subscriber traffic at a time

Access tracking: MCLAG driven

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BNG SRG Ethernet G.8032 Access Ring

AGN-SE

BNG Node

(primary instance 1)

SR

G

core

G.8032 Instance1: S-VLANs A, B

G.8032 Instance2: S-VLANs C, D S-VLAN A

S-VLAN B

S-VLAN C

S-VLAN D

AGN-SE

BNG Node

(primary instance 2)

RPL owner Instance1

RPL owner Instance2

• Redundant BNGs at aggregation site terminate open ends of G.8032 access ring

• Two G.8032 instances, each blocking towards a different BNG, ensuring loadsharing between BNGs • Unique S-VLAN assigned to each access node for residential traffic; different S-VLANs allocated to different G.8032 instances.

• MA between each access node and BNG; CFM down MEP over dedicated/residential vlan • EFD on BNGs to monitor line protocol of ring facing interface

• Subscriber Redundancy Groups (SRGs) running between BNGs • Ensure subscriber states are maintained across nodes

• Only a single node is responsible for forwarding of subscriber traffic at a time.

Access tracking: per OLT CCMs

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BNG SRG MPLS Access with PW-HE

AGN-SE

BNG Node

SR

G

core

Dual Homed

OLT

core

Single Homed

OLT

AGN-SE

BNG Node

SR

G

LAG

PW E(active)

PW E(standby)

MCLAG

• Redundant BNG nodes terminating Active/Standby pseudowire initiated by access PE(s)

• AN can be • Single homed to Access PE via single link or link bundling; Access PE initiates Active and Standby pseudowires towards BNGs.

• Dual homed to different Access PE nodes, via MCLAG; Each Access PE initiates a pseudowire towards one of the BNGs • Pseudowire state is coupled with state of MCLAG links at Access PE

• Programmable logic on Access PE performs MCLAG failover with pseudowire state change • Subscriber Redundancy Groups (SRGs) running between BNGs

• Ensure subscriber states are maintained across nodes • Only a single node is responsible for forwarding of subscriber traffic at a time

EEM

Correlation

Access tracking: PW state driven Access tracking: PW state driven

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Measured Failover times per access model Single session

Access Type

IPv4 traffic IPv6 traffic

Upstream Loss (ms)

Downstream Loss (ms)

Upstream Loss (ms)

Downstream Loss (ms)

Hub and Spoke MCLAG

59 250 59 547

G.8032 Ring 340 360 525 569

Active/Standby EoMPLS

270 355 330 327

(*) remote link failure carries a 20-30% penalty over local failure results (shown here)

Failure Triggers:

H&S MCLAG: local (BNG) and remote (OLT side) link failure (port shut)

G.8032 Ring: local (BNG) and remote (OLT side) link failure (port shut) (*)

A/S EoMPLS: local (BNG) link failure (port shut), manual pseudowire switchover (Access PE)

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Geo-Redundancy Roadmap

FCS in 5.2.2 for IPoE DHCPv4/v6 L2 connected subscribers. RP subscribers.

Access topologies: MCLAG and Dual homed/rings with MST and CCM

In 5.3.X plan is to add PPPoE/LAC support and LC based subscribers.

On access side also add PWHE, G8032 and pseudo MCLAG access support

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BNG Innovations vBNG/vBRAS

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Legacy PPPOE Offload to Cloud

Unified MPLS Network

IP

IP

Legacy PPPoE DSL Homes

PPPoE Sessions over

EoMPLS PW

DCG

L2 VXLAN

Gateway

IP

IP

L2 Vxlan Gateway (Nexus1kv)

Vlan

Vlan

Openstack

FMC Policy

AAA (QPS)

Access PE

• BRAS PPPoE functionality from physical to Service provider Cloud as vBRAS

• Capable to scale over a million subscribers in same Data Center • Assists interim migration of legacy PPPoE customers for future upgrade

• Released compute resources can be reutilized for other tasks. • CSR1000v based vBRAS, N1kv based VxLAN Gateway; OpenStack Orchestration

• VxLAN based PPPoE traffic tunneling • Achieves transparency of Subscriber MAC addresses through out DC Fabric

• Consumes less mac-address-table resources of DC switches • For Internet and QPS connectivity, vBNG NNI (dot1q) to DC gateway through DC fabric Path; IGP adjacency over NNI

DSLAM

DSLAM

IGW

DC Fabric Path

(VMDC)

vBRAS (CSR1Kv)

Access PE

VxLAN

VxLA

N

VLAN

VLAN

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What is NfV?

(From ETSI)… NFV decouples the network functions such as NAT, IPS, DNS, RR etc. from proprietary hardware appliances, so they can run in software. ….. It utilizes standard IT virtualization technologies that run on high-volume service, switch and storage hardware to virtualize network functions..

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Virtualizing Network Functions X86 versus Custom Network Processing Unit (NPU)

Network Forwarding (L0-3) Network Services (L4+)

BGP Route reflector, Firewall, BNG, DPI

Low to Med Throughput

Stateful functions

Unpredictable traffic

IPv6/v4, MPLS, VPNs, Optical

High throughput / BW

Stateless functions

Mostly predictable traffic

Better fit for NPU

Compute

Bandwidth

Better fit for x86

Compute

Bandwidth

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Cisco Cloud Services Router (CSR) 1000V

Cisco IOS-XE Software in Virtual Form-Factor

• Selected features of IOS XE based on targeted use cases

Not tied to any server or vSwitch, supports ESXi, KVM, Xen,

AMI

Delivers 10Mbps to 20 Gbps throughput, consumes 1 to 8

vCPU

• Term, Perpetual

• RESTful APIs (leverages OnePK) for automated management

Server

Hypervisor

Virtual Switch

OS

App

OS

App

CSR 1000V

Virtualized Networking with Rapid Deployment and Flexibility 44

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VMs

SP Aggregation

CSR 1000v as vPTA / vLNS

Industry’s first full featured virtual BNG (PTA/LNS) solution with scale and performance

CSR 1000v leverages IOS XE code-base from ASR 1000

– PTA / LNS features are part of the code base

Targets smaller scale deployments less than 4K sessions per virtual instance

– Up to 1Gbps throughput (phase 1)

– Setup rate between 50-100CPS

Targeted for selective PTA (PPPoE) and LNS deployment profiles

Customer

Premise

SP Core

Data Center v PTA

v LNS

45

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VMs

CSR 1000v as vISG

Virtual Intelligent Services Gateway (vISG) that can be deployed as access gateway for hospitality environments, providing the same subscriber management functionality (IPoE) currently offered by ASR1000

Targets smaller scale deployments less than 4K sessions per virtual instance

– Up to 1Gbps throughput (phase 1)

– Setup rate between 50-100CPS

vISG session creation FSOL –Unclassified MAC, DHCP.

Data Center

v ISG

Indoor Hotspot

Residential / Community Wi-Fi

Metro W i-Fi

Wi-Fi Access

46

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CSR1000v vBNG supported Profiles

Profile vPTA vLNS vISG

Session Type PPPoEoVLAN PPPoVLANoL2TP IPoEoVLAN

Features* Input/output ACL, ingress QoS

(policing) / egress QoS (shaping), vrf-awareness,

IPv4/IPv6 dual-stack, AAA, ANCP

IPv4/IPv6, HQoS, Input/output

ACL, dual-stack service and TC accounting, CoA Service Push

DHCP, Unclassified MAC,

HQoS, Input/output ACL, ISG TC, L4R, PBHK,

Unauthenticated timeout

vCPU 2 vCPU

Memory 8GB

Sessions 4k 4k 4k

Max Throughput tested 1Gbps 1Gbps 1Gbps

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4000 sessions tested with each profile

0

500

1000

1500

2000

2500

3000

3500

4000

4500

5000

CEF vIPoEIPoEoVLAN

vBRASPPPoEoVLAN

vLACPPPoEoVLAN

vLNSPPPoEoVLAN

Throughput in Mbits

CEF profile used as base performance IPoE sessions have a lighter memory footprint compared to PPPoE sessions (similar to the ASR1000) hence the difference in today’s performance Maximum throughput was achieved using 1450-byte packets (similar to Cisco’s competitor) Each profile was tested with 4000 active sessions with traffic distributed across.

CEF vs vBNG Performance

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vBNG Orchestration

VMs Data Center

Indoor Hotspot

Residential / Community Wi-Fi

Metro W i-Fi

Wi-Fi Access

NFV Orchestrator

VM and Service Lifecycle Manager

VM & Storage

Orchestrator

Network Services Orchestrator (NSO) (Based on Tail-f NCS)

Netc

onf/Yang

Or

CL

I

REST API /

JCloud (Future)

OpenStack APIs

OVS VNF

VNF

x86 Server

REST/NETCONF

YANG

OpenStack

Elastic Services Controller (ESC)

49

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physical CPE(s)

virtual CPE(s) 1:1 mapping over L2 connectivity

Virtual RG

M ultiservice Core Network

Large Scale Aggregation Network

Core Node CRS-3

Fiber, PON

Efficient Access Network

IP/MPLS Transport

Pre-Aggregation Node

DWDM, Fiber Rings, H&S, Hierarchical Topology

Aggregation Node

DWDM, Mesh Topology

IP/MPLS Transport

Aggregation Node CO Access Node OLT, FTTH: ME-4600

Ethernet Ring

H&S

Reduce home CPE to simple NID

Eliminate truck rolls for new

services

Introduce new services via software

upload

50

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BNG Innovations PWHE access for BNG

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EMSE ASR9K

Transport

Network

Residential

STB

Business

Corporate

Mobile 2G/3G / LTE

ASR9000 PE

L2/L3 VPN, BNG PW PW-

HE

IP/

MPLS Core VRF

BNG

VPLS/EVPN

1. Decoupling of service models from transport

2. Simplify transport models – Unified MPLS

3. Sonet/SDH like OAM and resiliency with MPLS-TP/MPLS-TE

4. Collapse Metro-PE and MSE

1. Leased transport or Multiple management domains

2. Multi-technology access/aggregation

3. SLA management

4. Capex optimizations

PW-HE – any service anywhere

PW

-HE

PW-HE - Flexible Service Deployment

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• Support for PPPoE and IPoE

• QOS support at session including SPI,

PWHE subint and port level.

• Features such as http-r, ACLs, Accounting, CoA and LFI

• 64K dual stack and 128K IPv4 subscribers

• 8K PWHE

• Ambiguous VLANs on PWHE sub-interfaces

• Subscribers on VC type-4

and VC type-11 pseudowires

• Multicast replicated in PPPoE

• SPAN is not supported

• NV edge nor LAC/L3 connected

• LC Based subscribers

• Nv Satellite

Supported and Unsupported Features

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LC type Access PW-HE hosting LCs Core facing LC support for PW-HE

traffic

Typhoon –SE LCs Supported Supported

Typhoon –TR LCs Not supported Supported

SIP-700 Not supported

(Limited coexistence only)

Not supported

(Limited coexistence only)

Trident based LCs

(-E/-B/-L versions)

Not supported

(Limited coexistence only)

Not supported

(Limited coexistence only)

RSP type Support

RSP-2 Not supported

RSP-440-SE Supported

RSP-440-TR Not supported

ASR 9000 PWHE + BNG Hardware Support

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PW-HE-BNG - Hierarchical Egress QoS

Four levels of H-QoS at the BNG – Classification and queuing of traffic

at subscriber level – Subscriber level scheduling of traffic

across subscribers on same PW and VLAN Allows operators to offer different levels of

service to different subscribers

– Scheduling of traffic across VLANs on same physical ports Enables controlled partitioning of interface

bandwidth among residential and business services

Per subscriber:

1x Strict Priority Q – lev el 1

1x Strict Priority Q – lev el 2

1x Strict Priority Q – lev el 3

5x WFQs

L1=Port L2=PW L3=PPP/IP Session L4=Class

Per

subscriber:

Shaper, BW,

BRR

Per PW-HE

Interface:

Shaper, BW

BRR

RADIUS provisioned CLI provisioned

Access

Node

PPPoE/IPoE Session

Pseudowire

Subscriber Traffic

(H-QOS)

IP

BNG

55

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PW-HE access for BNG (Use case)

MPLS

CORE

BNG Central Cluster

Geo Redundancy

AGG BNG

FULL Scale

10s of AGGR

Networks

MPLS

AGGR

PW

CAPEX SAVINGS

56

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Residential Services Session Redundancy, Virtualization, New Access

Pre-Aggregation Node

ASR-903, ASR-9001

DWDM, Fiber Rings, Mesh Topology DWDM, Fiber Rings, H&S, Hierarchical Topology Fixed and Mobile Access

Core Node

CRS-3

IP/MPLS Transport

IP/MPLS or Ethernet

Transport

Core Node

CRS-3

IP/MPLS Transport

Aggregation Node

ASR-9000

Aggregation Node

ASR-9001, 9006

Unified MPLS Network

IP

IP

Residential Community WIFI

IP

IP

Residential PON Homes

IP

IP

v CPE

Ethernet G.8032

Residential DSL Homes

IP

IP

RADIUS, Diameter

PGW

BRAS VNFs

EoMPLS PWE3

VXLAN VNFs

FMC Policy System Open Stack Orchestration

Legacy PPPoE DSL Homes

IP

IP IP

BNG PWHE+SRG, WAG

BNG SRG, mCLAG, G.832

Data Center Gateway

VXLAN

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Key Points

MEF and Enterprise Services

– Highly flexible and optimal Access for nV

– Rapid Deployment, management simplicity, OPEX savings for MEF Services with ZTD NID

Residential Services

– Better Reliability for Access Models

– Cost effective migration of Services to Cloud

Cisco is a player in BNG

– Cisco BNG Innovations bring competitive advantages

Any virtualization attempt needs to be done knowing the tradeoffs and tweaks.

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Take the opportunity to connect with us during 20 sessions and to find out more about: • Technical insights on the Internet of Things (IoT) • Routing: iWAN (Intelligent WAN) • SDN: APIC-EM for Enterprise and ACI for DC • Service Provider Innovations around SDN, Routing and Security • Latest Switching Innovations

University of Economics

Prague, Czech Republic 15.-16. July, 2015

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