ethernet principle
DESCRIPTION
ETHERNET TRANSMISSIONTRANSCRIPT
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Internal
ODP200005 Ethernet Port Mirroring and Link
Aggregation Principle
ISSUE 1.0
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This PowerPoint presentation describes
the usage and classification of Ethernet
port mirroring, and the principles and
modes of Ethernet link aggregation
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Upon completion of this course, you will be able
to:
Understand the function and classification
of mirroring
Understand the basic principles of LACP
Understand the functions and modes of
port aggregation
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Chapter 1 Chapter 1 Ethernet Port MirroringEthernet Port Mirroring
Chapter 2 Chapter 2 Ethernet Link AggregationEthernet Link Aggregation
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Ethernet Port Mirroring
Functions of mirroring
Traffic observation
Fault location
Classification of mirroring
Port-based mirroring
− Port mirroring is the process to copy the data on a port monitored to the specified monitoring port for analysis and monitoring of the data
Traffic-based mirroring
− Traffic mirroring is the process to copy the traffic matching the ACL to the specified monitoring port for analysis and monitoring of the packets
OverviewOverview
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Ethernet Port Mirroring
Application Application
Monitor
Internet
SWA
SWC SWBPC1 PC2
E0/3E0/2
E0/1Data Traffic
Mirroring Traffic
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Ethernet Port Mirroring
Port-based mirroring is the process to copy all the incoming/outgoing packets of
the mirrored port to the mirroring port, for traffic observation or fault location.
Ethernet switches support multiple-to-one mirroring, where the packets of
multiple ports are copied to one monitoring port.
Port-based mirroringPort-based mirroring
E0/1 E0/2
Mirroring Traffic
Data Traffic
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Ethernet Port Mirroring
Switches based on traffic mirroring mirror some traffics. Each
connection has data traffics in two directions, and these two
data traffics can be mirrored separately for the switches
One switch supports only one monitoring port
Traffic-based mirroringTraffic-based mirroring
E0/1E0/2
Mirroring Data of Traffic 1
Server Data of Traffic 1
Server Data of Traffic 2
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Chapter 1 Chapter 1 Ethernet Port MirroringEthernet Port Mirroring
Chapter 2 Chapter 2 Ethernet Link Aggregation Ethernet Link Aggregation
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Chapter 2 Chapter 2 Ethernet Link Aggregation Ethernet Link Aggregation
2.1 Basic concepts of link aggregation
2.2 LACP2.2 LACP
2.3 Mode of link aggregation2.3 Mode of link aggregation
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Basic concepts of link aggregation
Link aggregation, also known as port binding, port convergence, or
link convergence, is the process to aggregate multiple ports into
one aggregate group for sharing of the outgoing/incoming load
among various members. Seen from outside, one aggregate group
is like one port.
The upper-layer entities using link aggregation service treat the
multiple physical links in an aggregate group as a single logical link
Link aggregation is implemented on the data link layer
ConceptsConcepts
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Basic concepts of link aggregation
Higher link bandwidth
Traffic load sharing
Higher reliability: mutual dynamic backup between the
members in the same group
Advantages of link aggregationAdvantages of link aggregation
traffic
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Basic concepts of link aggregation
Physical parameters on both ends of the aggregated links must be the
same.
Number of links aggregated
Rate of links aggregated
Duplex mode of links aggregated
Logical parameters on both ends of the aggregated links must be the same.
The ports in the same aggregate group must have the same basic
configuration, which includes STP, QoS, VLAN, and port.
Restriction for link aggregationRestriction for link aggregation
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Chapter 2 Chapter 2 Ethernet Link Aggregation Ethernet Link Aggregation
2.1 Basic concepts of link aggregation2.1 Basic concepts of link aggregation
2.2 LACP
2.3 Mode of link aggregation2.3 Mode of link aggregation
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LACP
LACP: Link Aggregation Control Protocol (IEEE802.3ad).
It provides a standard negotiation method for the equipment
that exchanges data, for use by the system to automatically
form an aggregate link and start this link for receiving and
sending data according to its own configuration. After the
aggregated link is formed, it maintains the status of the link,
and automatically adjusts or dissolves the link aggregation
when the aggregation status changes.
LACPLACP
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LACP
LACP packet formatLACP packet format
ActorActorDestination
AddressDestination
AddressSource
AddressSource
AddressType ofProtocolType ofProtocol
SubTypeSub
Type VersionVersion PartnerPartner ReserveReserve
128 Bytes
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LACP
The system implements negotiation by exchanging protocol
packets, which include the configuration and current status of
the system.
Protocol packets may be triggered by event or periodically.
The protocol packets do not carry sequence numbers.
Low-speed protocol.
Protocol characteristicsProtocol characteristics
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LACP
Operation key is a configuration combination generated by LACP in port aggregation according to port configurations (such as rate, duplex, basic configurations, management key).
Aggregation is concerned with the following port configurations:
Port rate
Port duplex feature
Port hardware restriction
Basic port configuration, including VLAN, ACL, QOS, RSTP, MSTP, and GVRP
The KEY value of a key is included in the LACP packets, and participates in the selection of the aggregation group.
Calculation of the KEY valueCalculation of the KEY value
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Chapter 2 Chapter 2 Ethernet Link Aggregation Ethernet Link Aggregation
2.1 Basic concepts of link aggregation2.1 Basic concepts of link aggregation
2.2 LACP2.2 LACP
2.3 Mode of link aggregation
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Aggregation mode
Manual aggregation
The user configures aggregation group number and port members, and the port runs the LACP
Static aggregation
The user configures aggregation group number and port members, and the port runs the LACP
Dynamic aggregation
IEEE802.3ad-based LACP
The aggregation group number is automatically created by the protocol
The aggregation port is automatically matched and added according to the key value
Aggregation modeAggregation mode
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Aggregation mode
The following ports cannot be added to an aggregate group:
Mirrored monitoring port
Mirrored destination port
Port configured with static MAC address
Port configured with static ARP
Port enabled with 802.1x
POS port
VPN port
Ports cannot be added to an aggregate groupPorts cannot be added to an aggregate group
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Function and classification of port mirroring
Principles of link aggregation and types of
aggregation
Summary
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