Huawei S3700-28TP-PWR-SI 02354133 User Manual
Product codes
02354133
3.1 Ethernet Features
3.1.1 Link Aggregation
Link aggregation is a function that binds multiple physical interfaces on one device or multiple
devices into a logical interface (such as an Eth-Trunk). This logical interface is also called a load
balancing group or a link aggregation group.
devices into a logical interface (such as an Eth-Trunk). This logical interface is also called a load
balancing group or a link aggregation group.
After multiple physical interfaces are bound into a logical interface, the S3700 load balances the
traffic passing through the logical interface among the member interfaces. When a member
interface fails, the traffic on this interface is shared by the other member interfaces without
interrupting services. When the faulty interface recovers, the traffic is balanced among all
interfaces again.
traffic passing through the logical interface among the member interfaces. When a member
interface fails, the traffic on this interface is shared by the other member interfaces without
interrupting services. When the faulty interface recovers, the traffic is balanced among all
interfaces again.
Currently, the S3700 implements link aggregation between GE interfaces or FE interfaces. Load
balancing can be implemented based on the following information:
l
balancing can be implemented based on the following information:
l
Source MAC address
l
Destination MAC address
l
Source MAC address and destination MAC address
l
Source IP address
l
Destination IP address
l
Source IP address and destination IP address
Using the link aggregation technology, you can increase the bandwidth and improve link
reliability without upgrading the hardware, thus saving costs.
reliability without upgrading the hardware, thus saving costs.
3.1.2 Flow Control on an Interface
Flow control on an interface is a method of congestion management. It applies to all types of
flows. The S3700 implements flow control on an interface by using the hardware backpressure
mechanism. When an interface works in full duplex mode, the S3700 implements flow control
complying with IEEE 802.3x. When the interface works in half duplex mode, the S3700
implements flow control through the backpressure mechanism.
flows. The S3700 implements flow control on an interface by using the hardware backpressure
mechanism. When an interface works in full duplex mode, the S3700 implements flow control
complying with IEEE 802.3x. When the interface works in half duplex mode, the S3700
implements flow control through the backpressure mechanism.
When congestion occurs, the S3700 sends continuous Pause frames to the upstream device,
requesting it to stop sending data for a specified period of time. When the upstream device
receives the pause frames, it reduces the volume of traffic sent from its outbound interface. Flow
control on an interface does not identify flow types.
requesting it to stop sending data for a specified period of time. When the upstream device
receives the pause frames, it reduces the volume of traffic sent from its outbound interface. Flow
control on an interface does not identify flow types.
3.1.3 Traffic Suppression
Traffic suppression limits the number of unknown unicast packets, multicast packets, and
broadcast packets within a proper range to ensure network efficiency.
broadcast packets within a proper range to ensure network efficiency.
The S3700 can suppress the packets based on interfaces. When traffic suppression is enabled on
an interface, the interface monitors received unknown unicast packets, multicast packets, and
broadcast packets to check whether their traffic exceeds the threshold. If traffic exceeds the
threshold, the S3700 discards excessive packets to keep the traffic volume within the limit and
thus services on the network run normally.
an interface, the interface monitors received unknown unicast packets, multicast packets, and
broadcast packets to check whether their traffic exceeds the threshold. If traffic exceeds the
threshold, the S3700 discards excessive packets to keep the traffic volume within the limit and
thus services on the network run normally.
S3700HI Ethernet Switches
Product Description
Product Description
3 Link Features
Issue 05 (2012-10-20)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
11