Download - MPLS Based MetroE Networks v1
October, 2014
MPLS Based Metro Ethernet Networks
Introduction
This presentation outlines an overview of Traditional Metro
Ethernet networks in contrast to MPLS based Metro
Ethernet in a WAN environment.
What is Metro Ethernet?
• “… generally defined as the network that bridges or connects
geographically separated enterprise LANs while also
connecting across the WAN or backbone networks that are
generally owned by service providers. The Metro Ethernet
Networks provide connectivity services across Metropolitan
area, utilising Ethernet as the core protocol and enabling
broadband applications” – Source: Metro Ethernet Forum
What is Metro Ethernet?[Cont’d]
• A metropolitan-area Ethernet, Ethernet MAN, or metro
Ethernet network is a metropolitan area network (MAN) that
is based on Ethernet standards. It is commonly used to
connect subscribers to a larger service network or the
Internet. – Source: Wikipedia
What is Metro Ethernet?[Cont’d]
• The Metro Ethernet Forum [MEF] often describes
Metro-E as Carrier Grade Ethernet NetworksThe MEF, is the defining body for Carrier Ethernet, a global industry alliance comprising more than
220 organizations including telecommunications service providers, network equipment/software
manufacturers, semiconductors vendors and testing organizations.
The MEF’s mission is to accelerate the worldwide adoption of Carrier-class Ethernet networks and
services.
The Ethernet Overview
• Ethernet was initially developed as a LAN standard for
connecting at 10 Mbps speeds but has subsequently been
upgraded to offer 100 Mbps, 1Gbps, and now 100Gbps
speeds over both copper and Fibre mediums.
• Ethernet is one of the most significant disruptive innovations
of this generation—and has now evolved from Local Area
Networks (LANs) to the Metro Area Network (MAN).
Attributes of Metro/Carrier Ethernet
• Carrier Grade Ethernet, or Carrier Ethernet, is a ubiquitous,
standardized service defined by five attributes
1. Standardized services enable end users and service
providers to co-ordinate in order to achieve data
connectivity based on Carrier Ethernet between multiple end
user sites as required by organizations around the globe.
Attributes of Metro/Carrier Ethernet [Cont’d]
2. Scalability enables the data connectivity of any number of
multiple end user sites over any distance, whether it be metro,
regional, national or intercontinental using Carrier Ethernet.
Scalability of bandwidth from 1Mbps to 10Gbps and beyond,
in granular increments
3. Reliability enables end users to rely on Carrier Ethernet to run
their business and mission critical applications.
Attributes of Metro/Carrier Ethernet [Cont’d]
4. Service management enables service providers to rollout,
maintain and troubleshoot data connectivity services based
on Carrier Ethernet in a cost effective and timely manner.
5. Quality of Service enables the use of a single network to run
multiple services to multiple end-users running a wide variety
of applications with different bandwidth and latency
requirements - all by using Carrier Ethernet
Other Features of Metro-E
• Metro Ethernet services can be delivered not only over
traditional (native) Ethernet-based networks but can also
over other transport technologies. Examples of underlying
transport
• MPLS-based Layer 2 Virtual Private Networks (VPNs)
• IEEE 802.1ad Provider Bridges [VLAN Stacking “Q-in-Q”]
• Ethernet over SONET/SDH [EoS]
MSO/ Cable COAX
Direct Fiber
WDM Fiber
DS3/E3
Bonded Copper
Bonded T1/E1
Carrier 2
TDM
Ethernet
EthernetEthernet
Ethernet
EthernetEthernet
Ethernet
Direct Fiber
IEEE 802.3z, ae, G.8031, etc.
SONET/ SDH
PON Fiber
EthernetEthernet
Ethernet
Ethernet over Packet Wireless G.8032 Ethernet
Ring
Ethernet
Carrier 1
UNI ENNI
Carrier Ethernet Delivered over diverse protocols
Fig 1: MEFs idea of Ethernet delivered via diverse protocols
…. then, what is MPLS?
What is MPLS?
• Multiprotocol Label Switching (MPLS) is a mechanism in
high-performance telecommunications networks that
directs data from one network node to the next based
on short path labels rather than long network addresses,
avoiding complex lookups in a routing table. The labels
identify virtual links (paths) between distant nodes rather
than endpoints. – Source: Wikipedia.
….so, why should you care?
COMPANY A
IBADANCOMPANY A
DEDICATED LEASED CIRCUIT
VPN over leased lines
OREGUN, LAGOS
COMPANY AAGBARA
VPN over the Internet
COMPANY AOREGUN, LAGOS
IBADANCOMPANY A
COMPANY AAGBARA
VPN with MPLS
MPLS SP
COMPANY AOREGUN, LAGOS
IBADANCOMPANY A
COMPANY AAGBARA
MPLS Routers Terminologies
PE
P
PE
PE
PE
P
P P
CE
CE
CECE router ( customer edge router ) P (provider) routers PE (provider edge) routers
CE
MPLS Routers Terminologies cont’d
• A CE Router [Customer Edge Router]
• Its a router located on the customer premises that
provides an interface between the customer's LAN and
the provider's core network.
MPLS Routers Terminologies cont’d
• PE [Provider Edge]
• Routers sit at the edge of the network. CE routers
connect to PE routers and PE routers connect to the
core.
MPLS Routers Terminologies cont’d
• The P router [Provider Router]
• These are the core routers in the provider network that is
not connected to any customer site.
Traditional Metro Ethernet Networks
Traditional methods of Ethernet delivery:
• Services identified by VLAN IDs/physical ports
• VLAN IDs globally significant
• Resiliency provided using variants of the Spanning Tree
Protocol (…but could be a whole lot of problems sometimes)
Delivering Ethernet Over MPLS
MPLS Layer 2 VPN is known by another name as Virtual Private LAN
Service – [VPLS].
It creates a Layer 2 broadcast domain that is fully capable of learning
and forwarding on Ethernet MAC addresses and that is closed to a
given set of users.
MPLSL2VPN Brief Overview
Delivering Ethernet Over MPLS Cont’d
Ethernet delivery over MPLS:
• Services identified with the use of Labels in the SP cloud
• The Labels are just IDs and are locally significant
• Resiliency is also by redundant uplinks. [No spanning tree]
MPLSL2VPNs [VPLS] Benefits
Benefits for the customer:
Simplicity
Behaves like an “Ethernet switch in the SP cloud”
No routing interaction with the provider
Clear demarcation between subscriber and provider
Scalable
Provider configures site connectivity only Hierarchy
Summary
• Ethernet Services are in a period of tremendous
growth with great revenue potential for service
providers
• The Metro Ethernet Forum has standardised
Ethernet services and continues to enhance
specifications
Summary cont’d
• Traditional forms of Ethernet delivery are no longer suitable
for the delivery of “carrier-grade” Ethernet services
• MPLS provides a proven platform for the delivery of
scalable, flexible, feature-rich Ethernet services using the
same infrastructure used to deliver other MPLS-based
services
Questions?
Other References
• Asia Pacific Regional Internet Conference on Operational Technologies [APRICOT]
Alcatel Lucent MPLS presentation 2012 –By Paresh Khatri
• Cisco Solutions
• The MetroEthernet Forum
Presenters
• David Olayinka Mosaku
• Monday Aliku
Thank You