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MPLS-TP
Dont Forget the Control Plane!
Pat MooreMetaswitch Networks
Network Technologies Division
Visit us at stand 205
mailto:[email protected]://www.metaswitch.com/http://www.upperside.fr/mplsworld2011/mpls2011intro.htmmailto:[email protected]7/30/2019 Dont Forget the Control PlaneDont Forget the Control Plane
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Metaswitch Expertise
Previously Data Connection Ltd. (DCL)
Network Protocol source code since 1983
1st portable GMPLS protocol solution
1st portable O-UNI protocol solution
1st
portable LMP protocol solution1st portable G.709 OTN protocol solution
1st portable MPLS-TP protocol solution
Customers
http://www.tellabs.com/http://www.foundrynetworks.com/http://www.force10networks.com/http://www.ecitele.com/http://www.nec.com/http://www.orckit.com/en/home/a/01/7/30/2019 Dont Forget the Control PlaneDont Forget the Control Plane
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Agenda
MPLS-TP management provisioned vs. control plane
The benefits of an MPLS-TP control plane
Where does it fit?
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MPLS-TP Management Provisioned
Full centralized control of
Each LSP
Each hop of each LSP
Each backup LSP
Packet LSP and PW sublayers
Intelligence resides in the NOC
Simple and predictable
Works well in simple topologies
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MPLS-TP with a Control Plane
As management provisioned Same OAM
Plus a control plane
Both modes can co-exist
One-touch provisions entire LSP
Intelligence resides in NEs Auto-discovery of NEs and topology
Auto-tracking of available capacity
Route calculation
Signalling of LSP
Automated operation
Reduced OPEX
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Agenda
MPLS-TP management provisioned vs. control plane
The benefits of an MPLS-TP control plane
Where does it fit?
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Automated Discovery
IGP (e.g. OSPF) used to auto-discover NEs and links
Opaque LSAs flood link attributes
Available bandwidth
Latency
Whatever is important in your network
Standard TE extensions to OSPF and IS-IS
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Link Bundling
New link detected by local NEs
No change in network topology
IGP floods increased capacity on bundled link
Improved IGP scalability
Signalling chooses component link to use for each LSP
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Automated LSP Setup
Ingress NE processes LSP setup request (egress, bandwidth, etc.)
OSPF-TE route calculation runs on ingress NE
GMPLS signalling sets up each NE on the MPLS-TP path
Standard GMPLS extensions to RSVP-TE Targeted LDP signalling used for PW layer
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Automated Protection and Restoration
Various GMPLS protection and restoration schemes
Mesh Restoration and Segment Recovery defined
Linear and Ring Protection underway
Substantial automation Automated diverse route calculations for 1:N protection
Automated placement of branch and merge points
Automated reversion when primary LSP recovers
Intelligent use of backup LSP for low priority traffic
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On-demand Provisioning
LSP Setup request does not have to come from NOC
E.g. router acting as client to MPLS-TP layer
Router requests extra network capacity at its attached NE
User-to-Network Interface (UNI)
Client-server model between network layers
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Control Plane Extensions and Benefits
OAM signalling Enables NEs to agree what OAM mechanisms are to be used
No spurious alarms as OAM start is synchronized with end-to-end LSP activation
Reduced OPEX
Management Control Plane hand-off Management-established LSPs transitioned to control plane
and vice-versa
Facilitates network migration
Multi-segment pseudowire Adapting existing MS-PW to the MPLS-TP profile
Supports more diverse deployment scenarios
Standards baked
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Agenda
MPLS-TP management provisioned vs. control plane
The benefits of an MPLS-TP control plane
Where does it fit?
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Typical Deployment Scenario
Three MPLS-TP domains shown
Backbone uses control plane
Access uses management provisioning
MS-PW crosses domains to provide the end-to-end service
Access
MS-PW
Service
Backbone
S-PE
Access
S-PEStatic LSPSignalled LSPStatic
T-PE
Static
T-PE
Static LSP
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Multiple layers can include MPLS-TP transport service sublayer (e.g. PW for L2 Ethernet service)
MPLS-TP transport sublayer
TDM layer (OTN ODU)
WDM layer (OTN OCh)
Each Carrier uses only the layers it needs
Only use a layer if it adds value Other layers possible
GMPLS is common
Commonality Across Network Layers
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Conclusion: Dont Forget the Control Plane
MPLS-TP control plane is beneficial It brings significant automation and reduced OPEX
Management provisioned and control plane NEs will co-exist in many networks
Many vendors building NEs with both management and control plane provisioning
Standards are in place GMPLS has been around for years
Common GMPLS technology across layers Coherent management
Same look and feel
Come seeMetaswitch MPLS-TP at the
EANTC Live Demo
http://www.eantc.de/javaschttp://www.eantc.de/javasc7/30/2019 Dont Forget the Control PlaneDont Forget the Control Plane
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Thank [email protected]
Visit us at stand 205
http://www.metaswitch.com/http://www.upperside.fr/mplsworld2011/mpls2011intro.htm