17-OTA050101 Ethernet Service Introduction ISSUE 1.21
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Transcript of 17-OTA050101 Ethernet Service Introduction ISSUE 1.21
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Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.
Ethernet Service
Introduction
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Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved. Page1
Objectives
Upon completion of this course, you will be able to:
Outline the classification of Ethernet service;
Explain the function and applications of different types Ethernet
service.
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Contents
1. Basic Concepts
2. Ethernet Service Classification
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Basic Concepts
Port
External physical port of Ethernet unit, the common rates of
external port are 10M, FE, GE;
VC Trunk
Virtual Container Trunk, VC Trunk is built by VC. It is the
internal port of Ethernet unit.
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Basic Concepts of VLAN
VLAN 100 VLAN 200
Purpose of VLAN division:
Broadcast suppression
Security
Efficient management
VLAN division modes:
Port based
MAC address based
L3 protocol based
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Send
to
C
ross-connectunit
Note: Both of the external and internal ports can process Tag flag
Structure of Ethernet Unit
FE
GE
Collecting alarm
and performance
event
NX
VC4
GFP-F
NVC12/VC3/VC4
FE
Port
VCTRUNK
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Tag Attributes
Tag flag is used to identify the type of frames. Three types of Tag
attributes are available: Tag aware, Access, and Hybrid.
Tag Aware: When the port is set to be Tag aware, the port transmits the
packets with the Tag flag transparently and discards those without the Tag flag;
Access: When the port is set to be Access, the port attaches a Tag flag to thepackets without Tag flag according to its VLAN ID and discards those with the
Tag flag;
Hybrid: When the port is set to be Hybrid, the port can process packets
regardless of the Tag flag and attach a Tag flag to the packets without the Tag
flag according to its VLAN ID.
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Packet
PortTag Untag
Tag aware (In) Transmit transparently Discard
Tag aware (Out) Transmit transparently
Access (In) Discard Attach default VLAN ID
Access (Out) Delete VLAN ID
Hybrid (In) Transmit transparently Attach default VLAN ID
Hybrid (Out)
If VLAN ID is the same, delete
the Tag flag, otherwise transmit
transparently
Basic Concepts
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Contents
1. Basic Concepts
2. Ethernet Service Classification
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2. Ethernet Service Classification
2.1 Overview
2.2 EPL
2.3 EVPL
2.4 EPLAN
Contents
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EPL: Ethernet Private Line
EPLAN: Ethernet Private LAN
EVPL: Ethernet Virtual private Line
EVPLAN: Ethernet Virtual Private LAN
Overview
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EPL
Definition
EPL Classification
EPL (Ethernet Private Line) ,EPL can provide low latency
and high security point to point transmission.
Point to Point EPL: Point to point transmission without sharing;
Port Shared EPL: Share one Port with different VLAN ID;
VCTRUNK Shared EPL: Share one VCTRUNK with different
VLAN ID.
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Point to Point EPLA B
2f MS_SP Ring
T2000
NP ChainNE1
NE2
NE3
NE4
NE5
A B
PORT1 PORT2
PORT1 PORT2
VCTRUNK Service A Service B
Point to Point transmission without sharing
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Port Shared EPL
VCTRUNK C & C(1) Service C & C(2) Service
NE
1
NE2
NE3
NE4 NE5
PORT3 PORT4
C(2)C(1)
C (HQ.)
PORT3
NP Chain
T2000
Share one external port with different VLAN ID
2f MS_SP Ring
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VCTRUNK Shared EPL
NE1
NE2
NE3
NE4
NE5
DPORT1
PORT2
PORT2PORT1
E
D E
2f MS_SP RingNP Chain
Share one VCTRUNK with different VLAN ID
T2000
VCTRUNK D & D Service E & E Service
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Questions
How many types of EPL can be provided?
Can EPL implement VCTRUNK sharing with the same
VLAN ID?
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Definition
EVPL( Ethernet Virtual Private Line) multiple service
flows can share VCTRUNK with VLAN ID and MPLS. It
can improve the bandwidth utilization ratio and save the
ports resource of Ethernet unit.
EVPL
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EVPL-- Comparison
Application EPL EVPL
Point to Point Support Support
Port Shared Support Support
VCTRUNK
Shared
Support Support
MPLS Un-support Support
QinQ Un-support Support
EVPL can provide VCTRUNK sharing with MPLS and QinQ
technology
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MPLS Basics
MPLS: Multi-protocol Label Switching, standard routing and switching
platform;
Tunnel/VC: Two labels in MPLS, range of value is 16(220-1);
LSP: Label switching path, different value labels will be given in different
nodes, data can be sent forward according these labels;
P/PE: P (Provider) internal node of MPLS network, PE (Provider Edge) the
edge of MPLS network.
MPLS network
PE
PE PIP
MPLS
LSP
P
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QinQ Basics
QinQ technology is a VLAN stacking technology
C-VLAN
S-VLAN
Advantages of QinQ technology:
Expands VLAN and alleviates VLAN resource insufficiency;
Extends LAN service to WAN, connecting the client network to
the carrier network and supporting transparent transmission.
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EVPL (MPLS)
EVPL can provide VCTRUNK sharing with different MPLS labels if
the VLAN ID of the service are the same. The traffic of A and B
will share VCTRUNK1 with different Tunnel and VC values.
LAN Switch
SDH networkNE1 NE2
A2
A VLAN ID=11
Tunnel
VC
55
25
Tunnel
VC
55
26
VCTRUNK
OptiX OSN3500
Service link
B VLAN ID=11
A VLAN ID=11
B VLAN ID=11
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EVPL (QinQ)
EVPL can provide VCTRUNK sharing with different S-VLAN if the
C-VLAN ID of the service are the same. The traffic of A and B will
share VCTRUNK1 with different S-VLAN values.
LAN Switch
SDH networkNE1 NE2
A2
A VLAN ID=11
VCTRUNK
OptiX OSN3500
Service link
B VLAN ID=11
A VLAN ID=11
B VLAN ID=11
S-VLAN C-VLAN
20 11
S-VLAN C-VLAN
30 11
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Questions
Whats the difference between EPL and EVPL?
Whats the main feature of EVPL?
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EPLAN
Definition
EPLAN (Ethernet Private LAN), it is based on L2
switching. It can provide muti-points to muti-points low
latency and high security communication.
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EPLAN
EPLAN (Ethernet Private Local Area Network) all the sub-companies at
different areas can communicate with each other. NE3 implements the L2
switching function.
NE1
NE2
NE3
NE4
NE5PORT1
PORT1
F(1)
F(2)
PORT1
F(3)
VB
PORT1
VCTRUNK1
PORT1
VCTRUNK2VCTRUNK1VB
VB
PORT1
VCTRUNK1VCTRUNK
F(1) & F(2) Service
F(3) & F(2) Service
F(1) & F(3) Service
2f MS_SP Ring
T2000
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EPLAN-- MAC Add. Self-learning
Port 1
Port 2
MAC add. Port
MACA 1
MACB 1
MACC 2
MACD 2
L2 Switch
MACD MACA
MACA MACD
Forwarding based on destination address
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EPLAN-- VB/LP
VB: Virtual bridge, logical L2 switch. One Ethernet unit can
configure N*VB, each VB provides M*LP, the data in
different VB is isolated;
LP: Logical Port, the logical port of VB.
VB2VB3
Ethernet Unit
PORT
LP1
LP2
LP5
LP6
VCG
VB1
LP4
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EPLAN-- RSTP/STP
Root
RSTP/STP: Rapid/Spanning tree protocol. The protocol will
temporarily disable the backup links when loop of Ethernet
service is occurred in the network.
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Questions
What is the advantage of EPLAN?
What is the working mechanism of EPLAN?
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Summary
Basic Concepts
Ethernet Service Classification
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