Huy_3. 7600_EVC.pdf

© 2008 Cisco Systems, Inc. All rights reserved. Cisco Public

Session_ID

Presentation_ID 1

Building Carrier Ethernet Services Using Cisco Ethernet Virtual Circuits (EVC)

© 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 2 Session_ID

Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Agenda

Introduction

Cisco EVC Fundamentals

Operation and Packet Flow

Configuration


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Introduction


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BRKOPT-2201

14431_04_2008_c1

Access Edge

BRAS

SR/PE

DPI

Core Network

MPLS /IP

Content Farm

VOD TV SIP

DSL Residential

STB

Content Farm

VOD TV SIP

Mobile

ETTx

PON

MSPP

Cable

Business

Corporate

Residential

STB

Aggregation

L2 P-to-P native L2 P-to-P over PW L2 MP native bridging L2 MP VPLS L3 routed

Untagged Single tagged Double tagged 802.1q 802.1ad etc

Flexible Ethernet Edge


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Flexible Ethernet Edge Requirements

Support various Ethernet Encapsulations (802.1Q, 802.1ad, Q-in-Q, 802.1ah)

Flexible frame to service mapping

Flexible VLAN tag manipulation and translation

Multiple services for same port (multiplexed UNI)

Local (per-port) VLAN significance

Service instance scalability

Double tag awareness

H-QoS per VLAN

Standards based

Security, High Availability, OAM and so on…


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

What Is Cisco EVC Framework?

Cisco “EVC” is the next-generation cross-platform Carrier Ethernet Software Infrastructure.

Addresses Flexible Ethernet Edge requirements.

Supports service convergence over Ethernet.

Complies with MEF, IEEE, IETF standards.


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Service Abstraction

Flexible Service Mapping

Standards Alignment

Multiplexed Forwarding

Services Technology

EVC Framework

Support mix of Layer 2 and Layer 3 services on same physical port

Concurrent support of different flavors of Layer 2 services: Pt-to-Pt and Mpt

Ethernet Flow Points (EFPs)

• model Ethernet Service Layer

• transport agnostic

Alignment with emerging standards:

• MEF 6, 10.1, 11

• IEEE 802.1ad

• IEEE 802.1ah

Flexible definition of service delimiters based on Ethernet header fields

Selective EVC Mapping

Functional Highlights


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Cisco EVC Fundamentals


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BRKOPT-2201

14431_04_2008_c1

Cisco EVC Building Blocks

Ethernet Flow Point (EFP): Transport-agnostic abstraction of an Ethernet service.

Ethernet Virtual Circuit (EVC): Device local object (container) for network-wide service parameters. Not to be confused with MEF EVC.

Bridge Domain (BD): Ethernet Broadcast Domain local to a device.

Cisco EVC Uses the Following Concepts:


Presentation_ID

BRKOPT-2201

14431_04_2008_c1


Ethernet Flow Point (EFP): Ethernet Service Instance

Instance of a MEF EVC on a port

Classify frames belonging to a particular Ethernet Service

Apply features selectively to service frames

Define forwarding actions and behavior

CE A1 CE A2

CE A3

CE B1 CE B2

EVC Blue

EVC Red

EFP

EFP

EFP

EFP

Interface

Ethernet Flow Point


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

EFP


Ethernet Virtual Circuit (EVC): (Not to Be Confused with MEF EVC)

Global representation of MEF EVC on the device

Management Plane container

Hosts global EVC attributes

1-to-many mapping from EVC to EFPs

EFP

EFP

EFP

Interface

Management Plane

EVC

EVC

Ethernet Virtual Circuit


Presentation_ID

BRKOPT-2201

14431_04_2008_c1


Bridge Domain (BD):

Broadcast Domain internal to the device

Allows decoupling broadcast domain from VLAN Per port VLAN significance

1-to-many mapping from BD to EFPs

EFP

EFP

EFP

EFP

Interface

Management Plane

EVC

EVC

BD

Bridge Domain


Presentation_ID

BRKOPT-2201

14431_04_2008_c1


VLAN bridge has 1:1 mapping between VLAN and internal Broadcast Domain.

VLAN has global per-device significance

EVC bridge decouples VLAN from Broadcast Domain

VLAN treated as encapsulation on a wire

VLAN on a wire mapped to internal Bridge Domain via EFPs

Net result: per-port VLAN significance

VLAN Bridge EVC Bridge

VLAN VLAN VLAN EFP BD

EVC Bridge vs. VLAN Bridge


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Mapping MEF Services to Cisco EVC

E-Line:

Associate a point-to-point forwarding service to EFP

E-LAN:

Associate a multipoint forwarding service (Bridge Domain) with EFPs

E-Tree:

Associate a rooted-multipoint forwarding service (Bridge Domain with Split Horizon) with EFPs

Support for Various EVC Types


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Mapping MEF Services to Cisco EVC Support for Bundling and Service Multiplexing

CE

CE

UNI UNI

UNI

Service

Multiplexing

CE

CE UNI

UNI

UNI

All-to-one

Bundling

All

CE-VLANs

CE

CE UNI

UNI

UNI

Bundling

CE-VLAN

subset

PE PE PE

EFP match multiple

CE-VLANs

EFP match all

CE-VLANs

Different EFPs match

different CE-VLANs


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Mapping MEF Service Attributes to Cisco EVC

UNI Identifier

Physical Medium

Speed

Mode

MAC Layer

UNI MTU

Service Multiplexing

CE-VLAN for untagged/priority tagged Service Frames

Maximum Number of EVCs

Bundling

All to One Bundling

Ingress Bandwidth Profile Per Ingress UNI

Egress Bandwidth Profile Per Egress UNI

Layer 2 Control Protocols Processing

EVC Type

EVC ID

UNI List

Maximum Number of UNIs

EVC Maximum Transmission Unit Size

CE-VLAN ID Preservation

CE-VLAN CoS Preservation

Unicast Service Frame Delivery

Multicast Service Frame Delivery

Broadcast Service Frame Delivery

Layer 2 Control Protocols Processing

EVC Performance

UNI Attributes EVC Attributes

UNI EVC ID

CE-VLAN ID/EVC Map

Ingress Bandwidth Profile Per EVC

Ingress Bandwidth Profile Per COS ID

Egress Bandwidth Profile Per EVC

Egress Bandwidth Profile Per COS ID

EVC Per UNI Attributes

EFP Interface EVC


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Operation and Packet Flow


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Flexible

Service

Mapping

Packet Flow Pipeline

Ingress

Encapsulation

Adjustment

Tier 1

Input Features

Tier 2

Input Features

Frame Filtering

Egress

Encapsulation

Adjustment

Tier 1

Output Features

Tier 2

Output Features

Ingress

Interface

Inbound EFP

Outbound EFP

Egress

Interface

Forwarding

Service


Presentation_ID

BRKOPT-2201

14431_04_2008_c1


EFPs Enable Flexible Mapping of Frames into Services Based on:

VLAN tags

Single or Double

Unique or multiple values (ranges/lists)

Untagged traffic

Unclassified traffic (default)

Overview

port

s-vlan 200

s-vlan 200, c-vlan 5-10

s-vlan 300, 400

s-vlan 200, c-vlan 3

s-vlan 50

s-vlan 50, PPPoE

s-vlan 50, CoS 2

s-vlan 20

default

s-vlan 30

s-vlan 30, c-vlan any

untagged

s-vlan 200, c-vlan 3, IP

s-vlan 402- 410


Presentation_ID

BRKOPT-2201

14431_04_2008_c1


Unique VLAN ID Value or Untagged

Range of VLAN ID Values (Contiguous)

List of VLAN ID Values

Unique S-VLAN and Unique C-VLAN

Unique S-VLAN and Range of C-VLANs (Contiguous)

Unique S-VLAN and List of C-VLANs

EFP VLAN Matching Options

10 SA DA

VLAN = 10

EFP

10 SA DA

VLAN = 3-100

EFP

10 SA DA

VLAN = 3,10, 95-100, 203 EFP

10 SA DA

S-VLAN = 10 C-VLAN = 3 EFP

10 SA DA

S-VLAN = 10 C-VLAN = 3- 400 EFP

10 SA DA

S-VLAN = 10 C-VLAN = 3,20- 301 EFP

3

3

3


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Cisco EVC Follows a „Loose Match‟ Classification Model: Unspecified Fields Are Treated as Wildcard.

„encap dot1q 10‟ matches any frame with outer tag equal to 10:

„encap dot1q 10 sec 50‟ matches any frame with outer-most tag as 10 and second tag as 50


10

50 10

50

4 50

10

10

Loose Match Classification Rule


Presentation_ID

BRKOPT-2201

14431_04_2008_c1


Cisco EVC Follows the „Longest Match‟ Classification Model:

Frames are mapped to EFP with longest matching set of classification fields.

Inte

rfa

ce

10

200 10

100 10

130 10

VLAN 10

S-VLAN 10

C-VLAN 100

S-VLAN 10

C-VLAN 128-133

EFP

Longest Match Classification Rule


Presentation_ID

BRKOPT-2201

14431_04_2008_c1


EFP with „Default‟ encapsulation matches all frames otherwise unmatched by any other EFP on the same port.

If default EFP is the only one configured on a port, it matches all traffic on the port (tagged and untagged).

EFPs with „Default‟ Encapsulation

VLAN 10

VLAN 20

Default

VLAN 10

VLAN 20

VLAN 50

Untagged

Interface EFP

Default

VLAN 10

VLAN 20

VLAN 50

Untagged

Interface

EFP


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Flexible

Service

Mapping

Ingress

Encapsulation

Adjustment

Tier 1

Input Features

Tier 2

Input Features

Frame Filtering

Egress

Encapsulation

Adjustment

Tier 1

Output Features

Tier 2

Output Features

Ingress

Interface

Inbound EFP

Outbound EFP

Egress

Interface

Forwarding

Service

Encapsulation Adjustment


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

31 25 SA DA 20 10 SA DA

31 SA DA 20 10 SA DA

31 25 SA DA 10 SA DA


31 25 SA DA SA DA

25 SA DA 10 SA DA

SA DA 20 10 SA DA

20 SA DA 20 10 SA DA

VLAN Acrobatics


Cisco EVC Supports Flexible VLAN Tag Manipulations:

Add 1 VLAN Tag

Add 2 VLAN Tags

Remove 1 VLAN Tag

Remove 2 VLAN Tags

1:1 VLAN Translation





Presentation_ID

BRKOPT-2201

14431_04_2008_c1


Ingress VLAN manipulations should be the transpose of egress VLAN manipulations to guarantee symmetric flows on links.

If adding a VLAN tag on ingress, should remove that tag on egress

If removing a VLAN tag on ingress, should add that tag on egress

If translating 1 or 2 tags on ingress, should translate back on egress


Egress: Push VLAN

Ingress: Pop VLAN

Symmetric Translations


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Flexible

Service

Mapping

Ingress

Encapsulation

Adjustment

Tier 1

Input Features

Tier 2

Input Features

Frame Filtering

Egress

Encapsulation

Adjustment

Tier 1

Output Features

Tier 2

Output Features

Ingress

Interface

Inbound EFP

Outbound EFP

Egress

Interface

Forwarding

Service

Multiplexed Forwarding Services


Presentation_ID

BRKOPT-2201

14431_04_2008_c1


Cisco EVC supports flexible access VLAN to forwarding service mapping

1-to-1 access VLAN to a service

Same port, multiple access VLANs to a service

Multiple ports, multiple access VLANs to a service

Forwarding services include:

L2 point-to-point local connect

L2 point-to-point xconnect

L2 multipoint bridging

L2 multipoint VPLS

L2 point-to-multipoint bridging

L3 termination


Presentation_ID

BRKOPT-2201

14431_04_2008_c1


Point-to-Point Layer 2 Forwarding Service

No MAC learning (minimize bridge resource usage)

Connect:

Two EFPs on same interface (hair-pin)

Two EFPs on different interfaces

Xconnect:

EFP to EoMPLS PW

connect

(hair-pin)

connect xconnect

Pseudowire

EFP

Interface

Point-to-Point Forwarding Services


Presentation_ID

BRKOPT-2201

14431_04_2008_c1


L2 Native Ethernet Multipoint Bridging

MAC-based Forwarding and Learning among two or more EFPs and switchports

Per port (local) VLAN significance on EFPs

Split Horizon Group: Prevent switching between EFPs in a group

VPLS

Extend Ethernet Multipoint Bridging over

pseudowire full mesh

Split Horizon support over attachment circuits

(configurable) & pseudowires (default).

Pseudowire

EFP

Interface

BD

BD VFI

Bridge

Domain

Virtual

Forwarding

Instance

Split Horizon

Group

Multipoint Forwarding Services


Presentation_ID

BRKOPT-2201

14431_04_2008_c1


BD with Split Horizon Group can be used to implement rooted-multipoint forwarding service:

Place all Leaf EFPs in Split Horizon Group

Keep Root EFP outside the Split Horizon Group

Net effect:

Bidirectional connectivity between Root and and all Leaf EFPs.

Leaf EFPs cannot communicate to each other

Leaf

EFP

Interface

BD

Bridge

Domain

Split Horizon

Group

Root

EFP

Leaf

EFP

Leaf

EFP

Rooted-Multipoint Forwarding Services


Presentation_ID

BRKOPT-2201

14431_04_2008_c1


Provide Layer 3 IP/L3VPN Service over Ethernet transport.

Two models:

Sub-interface based

SVI based (allows concurrent routing/bridging)

EFP

Interface

BD SVI

Bridge

Domain

Switch Virtual

Interface

Split Horizon

Group

Sub-

interface

Route

d P

ort

s

L3 Forwarding Services


Presentation_ID

BRKOPT-2201

14431_04_2008_c1


Multiplexed Service Interface (e.g. UNI)

Mix of L2 and L3 services on same port

Different flavors of L2 services on same port

Point-to-Point

Multipoint

Native Ethernet and over MPLS Pseudowires

Route

d P

ort

Pseudowire

EFP

Interface

BD

BD VFI

Bridge

Domain

Virtual

Forwarding

Instance

Split Horizon

Group

BD SVI

Switch

Virtual

Interface

xconnect

Native

Ethernet

Bridging

VPLS

connect

IP / L3VPN

Putting It All Together


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Configuration


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

interface

Cisco EVC Configuration Anatomy

Per Port Per EVC

Features

Per Port Per EVC

Features Per Sub-interface

Features (L3)

Layer 2 Services Bridging (VPLS via SVI)

xconnect (EoMPLS) Local Connect

L3 VRF

Global

ethernet evc <evc-name>

service instance <efp-id> ethernet <evc-name> service instance <efp-id> ethernet <evc-name> sub-interface

EFP

EVC


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Configuring EFPs (Service Instance)

interface <type><slot/port>

service instance <id> ethernet <evc-name>

<match criteria commands>

<rewrite commands>

<forwarding commands>

<feature commands>

• id is per-port

• evc-name global per network

• VLAN, VLAN range/list,

double-tags, CoS, Ethertype

• VLAN tag pop / push /

translate

• Layer 2 Point-to-Point or

Multipoint Bridging

• QoS, ACL, etc…


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Configuring Flexible Frame Matching

Single-Tagged Frame encapsulation dot1q {any | “<vlan-id>[,<vlan-id>[-<vlain-id>]]”}

VLAN tag can be single, multiple or range or any (1-4094).

Double-Tagged Frame encapsulation dot1q <vlan-id> second-dot1q {any | “<vlan-id>[,<vlan-id>[-<vlain-id>]]”}

First vlan tag must be unique, second vlan tag can be any, unique, range or multiple

Untagged Frame encapsulation untagged

Match un-tagged frames, for example control traffic

Default encapsulation default

Match all frames tagged or untagged that are not matched by other more specific service instances

interface gig 1/1/1 service instance 1 ethernet encapsulation ? default catch-all unconfigured encapsulation dot1ad 802.1ad - Provider Bridges dot1q IEEE 802.1Q Virtual LAN or S-VLAN priority-tagged Priority tagged EFP untagged Untagged encapsulation


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Configuring VLAN Manipulations

NPE1(config-if-srv)# rewrite ingress tag pop ?

1 Pop the outermost tag remove 1 tag

2 Pop two outermost tags remove 2 tag

NPE1(config-if-srv)# rewrite ingress tag push dot1q 10 add one tag

NPE1(config-if-srv)# rewrite ingress tag push dot1q 10 second-dot1q 20 add two tags

NPE1(config-if-srv)# rewrite ingress tag translate ?

1-to-1 Translate 1-to-1




interface gig 1/1/1 service instance 1 ethernet encapsulation dot1q 10 rewrite ingress tag ? pop Pop the tag push Rewrite Operation of push translate Translate Tag


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Configuring Point-to-Point Forwarding Services

Point-to-Point Local Connect

connect <name> <interface-type/slot/port> <efp-id> <ethernet-type/slot/port> <efp-id>

interface GigabitEthernet4/1/0 service instance 3 ethernet encapsulation dot1q 51 rewrite ingress tag translate 1-to-2 dot1q 52 second-dot1q 52 symmetric interface GigabitEthernet4/1/1 service instance 3 ethernet encapsulation dot1q 52 second-dot1q 52 connect eline-3 GigabitEthernet4/1/0 3 GigabitEthernet4/1/1 3

Point-to-Point xconnect

xconnect <peer-add> <VC-ID> encapsulation mpls

interface GigabitEthernet4/1/1 service instance 11 ethernet encapsulation dot1q 101 second-dot1q 60-70 xconnect 10.0.0.3 101 encapsulation mpls


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Configuring Multipoint Forwarding Services

Multipoint Native Ethernet Bridging and VPLS bridge-domain <global-vlan-id> [split-horizon]

Split-horizon to disable L2 communication between two EFPs

Local Bridging interface GigabitEthernet4/1/0 service instance 101 ethernet encapsulation dot1q 101-1000 bridge-domain 100 interface GigabitEthernet4/1/1 service instance 101 ethernet encapsulation dot1q 101-1000 bridge-domain 100 interface GigabitEthernet3/1 switchport access vlan 100 switchport mode dot1q-tunnel

VPLS interface GigabitEthernet4/1/0 service instance 2 ethernet encapsulation dot1q 20 bridge-domain 20 split-horizon interface GigabitEthernet4/1/1 service instance 2 ethernet encapsulation dot1q 20 bridge-domain 20 split-horizon interface Vlan20 xconnect vfi vpls-20


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Configuring Point-to-Multipoint Forwarding Service

Local Bridging interface GigabitEthernet4/1/0 service instance 101 ethernet encapsulation dot1q 101-1000 bridge-domain 100 split-horizon interface GigabitEthernet4/1/1 service instance 101 ethernet encapsulation dot1q 101-1000 bridge-domain 100 split-horizon interface GigabitEthernet3/1/2 service instance 101 ethernet encapsulation dot1q 101-1000 bridge-domain 100

Multipoint Native Ethernet Bridging and VPLS bridge-domain <global-vlan-id> [split-horizon]

Set all leaf EFPs in Split Horizon Group to disable communication between leaf EFPs.

Leaf

Leaf

Root

Gig3/1/2

BD

Bridge

Domain

Split Horizon

Group

Root

Leaf

Leaf

X

Gig4/1/1

Gig4/1/0


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Single tag termination interface GigabitEthernet4/1/1 service instance 100 ethernet encapsulation dot1q 100 rewrite ingress tag pop 1 symmetric bridge-domain 100 interface Vlan100 ip address 100.1.100.1 255.255.255.0

Double tag termination interface GigabitEthernet4/1/1 service instance 100 ethernet encapsulation dot1q 100 second 200 rewrite ingress tag pop 2 symmetric bridge-domain 100 interface Vlan100 ip address 100.1.100.1 255.255.255.0

Configuring L3 Forwarding Service


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Summary

Service Abstraction


Standards Alignment

Multiplexed Forwarding

Services Technology

EVC Framework

Support mix of Layer 2 and Layer 3 services on same physical port

Concurrent support of different flavors of Layer 2 services: Pt-to-Pt and Mpt

Ethernet Flow Points (EFPs)

• model Ethernet Service Layer

• transport agnostic

Alignment with emerging standards:

• MEF 6, 10.1, 11

• IEEE 802.1ad

• IEEE 802.1ah

Flexible definition of service delimiters based on Ethernet header fields

Selective EVC Mapping

Cisco EVC Framework


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Q and A


Presentation_ID

BRKOPT-2201

14431_04_2008_c1

Documents

Huy_3. 7600_EVC.pdf