Transportn paketov infrastruktura poskytovatel slueb TECH-SP3
David Jakl Cisco Systems Engineer
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Static or reduced Budgets
OTT services, video, mobility drive bandwidth, networks continue to grow
Managing 100s to 1,000s of devices
with different procedures, different user interfaces, different systems
Motivation: What are Service Operator Challenges?
Increasing
Operational
Complexity
Stagnant
Revenue $
Explosive
Bandwidth growth
Competitive pressure, price erosion
Need to capture new markets but time to deploy for new services is too slow
Simple, Uniform and
Open Architecture
Scalable Architecture
Programmable, Open
Architecture
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Cisco Open Network Environment
Evolved Programmable Network
Video
Business
Cloud
Mobility
NCS NCS
APIs
APIs
EDGE CORE
Access
VM VM
Edge
Core
VM
Agility
Optimize
Revenue $
Always ON
On-Demand Services Anywhere
Dynamic Scale
Application Interaction
Seamless Experience
Policy
Real-Time Analytics
Fully Virtualized
Intelligent Convergence
Automated
Open and Programmable
Access
Evolved Services Platform
Service Broker Business Intents Applications and Services
CDN
VM
VM / Storage Control
Service Catalog Service Orchestration Apps
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Agenda
EPN 4.0
nV Satellite
Autonomic Networking
Zero-IP
Autonomic Carrier Ethernet
Summary
EPN 4.0
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Ciscos Open Network Environment
N etwork API s (REST) a nd Services Catalog
Orchestration Mu lti-La yer Contro l, Service Chaining a nd Policy En forcement
Controllers , Collectors
onePK, OpenFlow, PCEP, N etconf/YANG, BGP-LS, GMPLS
nLigh t IP +O p tical
Virtualized Infrastructure Progra mming a nd Managing of Virtu al Resources
Physical Infrastructure Progra mming a nd Managing of Physical Resources
Network Function Virtualization Pa rt of ES P a nd EPN (Network, Stora ge, Compute )
CRS ASR 9000 ASR 9XX
NCS2000
Virtual PE Virtualized
IOS-XR VM Cisco nV
vGiLAN
VM
vFirewall
VM
vDPI
VM
vNAT
VM
vBNG
VM
vDDoS
VM
vSLB
VM
NCS4000 NCS6000
ME Series
Orchestration WAE
Quantum PS
ESP Cloud
Orchestration
Nexus
UCS
EPN System Scope
Cisco Evolved Programmable Network Leading the NFV / SDN Evolution
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EPN System Overview
Unified MPLS Transport
Integrated BNG, WAG, CGN Virtualized PGW, BRAS
Virtualized RR, PCRF, CPEs
Enterprise
FMC
Corporate
Residential
FMC
IP
Consumer Convergence Unified Subscriber Experience
Business Convergence Unified L3 VPN experience Seamless and Personalized BYOD
remote access and VPN Access
Virtualized Network Services
nV
MPLS
Ethernet
AN
uwav e ACM
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EPN System Components
Unified MPLS Transport
Fixed Edge Mobile Edge
Converged DPI Fixed CGN
Fixed PCRF
Unified Subscriber Experience Seamless Subscriber Mobility
Mobile MAG
Fixed MAG LMA MPC
Enterprise
Fixed
Corporate
Residential
Fixed
IP
FAN
ASR 920
ME3600X
PAN
ASR-903
PAN-SE
ASR-9001
AGN-SE
PAN-SE
ASR-900X
AGN-SE
PAN-SE
ASR-900X
CN
CRS-3
NMS
Prime Network Provisioning
& Performance
AAA, PCRF
Quantum Policy Server
DHCP
Cisco PNR
FAN (PON,
DSL, Ethernet)
ME 4600, 2600
CSG : ASR
901
ASR 920
CPEs: vHN,
CSR1000v,
ISR, ASR1k
Virtualized Route Reflector
Virtualized PGW, BRAS, CPE, VXLAN GW
FAN (PON,
DSL, Ethernet)
ME 4600, 2600
OpenStack
Orchestration
NID
ME-1200
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Unified MPLS: What Key Technologies Are Involved? RFC 3107 label allocation provides hierarchy for scale
BGP Filtering Mechanisms enable the network to learn what is needed, where is needed and when is needed
Seamless multicast integration with LSM and mLDP
Flexible Access Network Integration options: MPLS (Labeled BGP Extension, LDP), Ethernet, nV
Remote LFA FRR and BGP PIC for seamless intra- and inter-domain high availability
Contiguous and consistent Transport and Service OAM and Performance Monitoring
Autonomic Networks for Unified MPLS Self Organization, Microwave ACM for Unified MPLS network self-correlation
Auto-IP address assignment and dynamic change
Virtualized L2/L3 Services Edge with PW Headend
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Unified MPLS Transport Single AS, Multi-Area LSPs between Remote Access Node Loopback
Aggregation IGP Domain
PAN-ABR
Inline-RR
CN-ABR
Inline-RR
MTG
Core IGP Domain
iBGP iBGP
iBGP IPv 4+label
Imp-Null
iBGP IPv 4+label
Next-Hop-Self Next-Hop-Self
Central RR
CN-ABR
Inline-RR
PAN-ABR
Inline-RR
iBGP
Aggregation IGP Domain
Next-Hop-Self
iBGP IPv 4+label
LDP LSP LDP LSP
pop push
swap
pop swap
swap swap pop
AN AN
Access IGP Domain Access IGP Domain
iBGP iBGP
push
push
swap push
swap
pop swap push
swap
pop swap
iBGP IPv 4+label iBGP IPv 4+label
Next-Hop-Self Next-Hop-Self
LDP LSP LDP LSP
LDP LSP iBGP Hierarchical LSP
Control
Forwarding
push
Service LSP
LDP Label
BGP Label
Service Label
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Unified MPLS BGP Control Plane Single AS, Multi Area IGP, labeled BGP Access
Aggregation Node
DWDM, Fiber Rings, Mesh Topology DWDM, Fiber Rings, H&S, Hierarchical Topology Fiber or uWav e Link, Ring
Core Network Access Network Aggregation Network
Core ABR
IP/MPLS Transport
IP/MPLS Transport
Core ABR Access Nodes
IP/MPLS Transport
Example: IP RAN VPNv4 Service
Service Edge Node (BNG, MTG)
Inline RR Inline RR
VPNv4 PE
CSG
Unified MPLS Transport
IPv4+label PE
BNG, MSE
Inline RR
NHS
External RR
IPv4+label ABR iBGP
IPv4+label
iBGP
VPNv4
Aggregation Node
VPNv4 PE
MTG (EPC GW)
iBGP
IPv4+label
iBGP
VPNv4 iBGP
VPNv4
Inline RR
NHS
Inline RR
RR
External RR
RR
iBGP
IPv4+label IPv4+label PE
Inline RR
NHS
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Optimal Routing with BGP Accumulated IGP
Default BGP best path calculation based on IGP cost to next-hop only
Next-hops IGP cost to destination ignored leading to suboptimal routing
BGP AIGP enhances BGP best path calculation by accounting for both cost to next-hop and next-hops cost to reach destination
Eliminates sub-optimal routing
Aggregation IGP Domain
PAN-ABR
Inline-RR
CN-ABR
Inline-RR
Core IGP
Domain
iBGP
iBGP IPv 4+label
CN-ABR
Inline-RR
LDP LSP LDP LSP
AN
Access IGP Domain
iBGP
iBGP IPv 4+label
LDP LSP
iBGP Hierarchical LSP
AIGP=5
Traffic Forwarding
AIGP=10
NHS
NHS
Total
Cost = 15
Total
Cost = 10
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MPLS Resiliency Solution: LFA and Remote LFA
LFA simplifies management of the underling infrastructure
When no local LFA is available a node dynamically computes its remote loop free alternate node(s)
Done during SFP calculations using PQ algorithm (see draft)
The node automatically establishes a directed LDP session to the remote node
The directed LDP session is used to exchange labels for the FEC in question
On failure, the node uses label stacking to tunnel traffic to the Remote LFA node, which in turn forwards it to the destination
A1
C1
C2
C3
C4
A2
Backbone
Access Region
C5 Directed LDP
session
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Remote LFA FRR - Protection
C2s LIB
C1s label for FEC A1 = 20
C3s labe
