MEF

MetroEthernetForum - MEF

MetroEthernet, Carrier Ethernet

Lehtori Karo Saharinen

karo.saharinen@jamk.fi

Opintojaksosuunnitelma

MetroEthernetForum - MEF

MEF Introduces MEF 3.0 Global Services Framework

MetroEthernet

Puhdas Ethernet (L2) yhteydellisyys
Operaattorin tarvitsemat tuet/lisäykset Ethernet protokollaan

MinM -kehystys
"standardit rajapinnat" operaattori <-> asiakas
"standardit rajapinnat" operaattori <-> operaattori

Myös esim. tarkat Quality of Service -määritelmät
Välillä materiaalissa Carrier Ethernet... tuntuu menevän MEF:lläkin termit sekaisin

Ethernet Services

Service Type	Port-Based (All to One Bundling)	VLAN-Based (EVC identified by VLAN ID)
E-Line (Point-to-Point EVC)	Ethernet Private Line (EPL)	Ethernet Virtual Private Line (EVPL)
E-LAN (Multipoint-to-Multipoint EVC)	Ethernet Private LAN (EP-LAN)	Ethernet Virtual Private LAN (EVP-LAN)
E-Tree (Rooted-Multipoint EVC)	Ethernet Private Tree (EP-Tree)	Ethernet Virtual Private Tree (EVP-Tree)

Source: EVC Ethernet Services Definitions Phase 3

Ethernet Line- E-LINE

Ethernet Line - E-LINE

UNI - User to Network Interface

Rajapinta tilaajan ja operaattorin välillä (ns. demarcation point)
Yksi (untagged) tai useampi (tagged) VLAN voidaan sitoa yhteen EVC:hen (VLAN aware/unaware)
"A UNI can support up to 4K EVCs" (lue: 802.1Q TAG -field 2^12)

CEN - Carrier Ethernet Network

Yhden operaattorin omistama tietoliikenneverkko

CE - Customer Edge

Esim. kytkin, reititin, palomuuri, ...

EVC - Ethernet Virtual Circuit

Polku tiedonsiirtoverkon lävitse

Source: EVC Ethernet Services Definitions Phase 3

Ethernet Private Line - EPL

MEF: Overview-of-MEF-6.1_and_10.3.pptx

Ethernet Virtual Private Line - EVPL

MEF: Overview-of-MEF-6.1_and_10.3.pptx

Ethernet LAN

Yhteys avataan useissa pisteissä asiakkaalle ns. tähtitopologiana

Source: EVC Ethernet Services Definitions Phase 3

Ethernet LAN

MEF: Overview-of-MEF-6.1_and_10.3.pptx

Ethernet Tree

Yhteys avataan useissa pisteissä asiakkaalle ns. hub&spoke -topologiana

Source: EVC Ethernet Services Definitions Phase 3

Ethernet Tree

MEF: Overview-of-MEF-6.1_and_10.3.pptx

Multiple Carrier Ethernet Networks (Operators/ISPs)

ENNI - External Network to Network Interface
Yhteys viedään toiselle operaattorille

Source: EVC Ethernet Services Definitions Phase 3

Multiple Carrier Ethernet Networks (Operators/ISPs)

Rajapinnat vaativat sopimuksia

Source: Overview_of_MEF_26-1-Jan-13-2012.ppt

ENNI - Interconnection details

Physical Layer: Gigabit and 10Gigabit Ethernet IEEE Std 802.3 – 2005

1000Base-SX, 1000Base-LX, 1000Base T, 10GBASE-SR, 10GBASE-LX4, 10GBASE-LR, 10GBASE-ER, 10GBASE-SW, 10GBASE-LW, 10GBASE-EW IEEE Std 802.3 – 2005

One or more physical links

Link aggregation
Protection

Supported ENNI Frame Formats:

Untagged
Single S-Tag (TPID = 0x88A8)
Single S-Tag (TPID = 0x88A8) followed by a single C-Tag (TPID = 0x8100)

Maximum Transmission Unit

Size : 1526 bytes required
Size : 2000 bytes recommended

Source: Overview_of_MEF_26-1-Jan-13-2012.ppt

Multiple Carrier Ethernet Networks (Operators/ISPs)

Source: Overview_of_MEF_26-1-Jan-13-2012.ppt

Service Frame Delivery

Broadcast

Deliver to all UNIs in the EVC but the ingress UNI

Multicast

Delivered to all UNIs in the EVC but the ingress UNI

Unicast (unknown and known destination address)

Delivered to all UNIs in the EVC but the ingress UNI if unknown destination address
Delivered to the UNI with known destination MAC address

Layer 2 Control (e.g., BPDU)

Discard, peer, or tunnel

Source: Ethernet Services Attributes Phase 3

Layer 2 Control Protocol - L2CP (e.g. BPDU)

Discard

The MEN will discard ingress L2CP frames

Peer

The MEN will actively participate with the protocol

Tunnel

Service Frames containing the protocol will be transported across the MEN to the destination UNI(s) without change

MEF: Overview-of-MEF-6.1_and_10.3.pptx

CE VLAN ID Preservation 1

Ethernet Virtual Private Lines to a Hub Location

In this example, CE-VLAN Preservation = No for all EVCs (See EVC service attribute table 16 of MEF 6.1)
Service Provider has three EVCs, each from a branch location to a hub location.
UNI 1 is the hub location and the other UNIs are the branch locations.
The CE-VLAN ID/EVC Maps as agreed to by the Subscriber and the Service Provider for each UNI are included in the figure.

MEF: Overview-of-MEF-6.1_and_10.3.pptx

CE VLAN ID Preservation 2

Ethernet Private LAN

In this example, CE-VLAN Preservation = Yes (See EVC service attribute table 20 of MEF 6.1.1)
the Service Provider provides a single Ethernet Private LAN associating four UNIs.

MEF: Overview-of-MEF-6.1_and_10.3.pptx

Quality of Service - Performance Metrics

The performance for an EVC is specified using one or more Performance Metrics. A Performance Metric is a quantitative characterization of Service Frame delivery quality.
Performance Metrics:

One-way Frame Delay Performance
One-way Frame Delay Range Performance
One-way Mean Frame Delay Performance
One-way Inter-Frame Delay Variation Performance
One-way Frame Loss Ratio Performance
One-way Availability Performance
One-way Resiliency Performance expressed as High Loss Intervals
One-way Resiliency Performance expressed as Consecutive High Loss Intervals
One-way Group Availability Performance (Section 8.8.6)

Source: Ethernet Services Attributes Phase 3

Quality of Service - Bandwidth Profiles

Based on same parameters and algorithm as in MEF 10.2
- Committed Information Rate (CIR) in bits/sec
- Committed Burst Size (CBS) in bytes
- Excess Information Rate (EIR) in bits/sec
- Excess Burst Size (EBS) in bytes
- Coupling Flag
- Color Mode – always set to Color-Aware
Ingress Bandwidth Profile (policing)
- Applied per OVC End Point or per OVC End Point and Class of Service
- Egress Bandwidth Profile (shaping)