Flow Control On An Interface; Vlan - Huawei S2700 Product Documentation

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Link aggregation is a function that binds multiple physical interfaces on one device 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 S2700 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.
Currently, the S2700 implements link aggregation between GE interfaces or FE interfaces. Load balancing can
be implemented based on the following information:
Source MAC address
Destination MAC address
Source MAC address and destination MAC address
Using the link aggregation technology, you can increase the bandwidth and improve link reliability without
upgrading the hardware, thus saving costs.
Parent topic:
Ethernet Features

1.4.1.1.4.1.2 Flow Control on an Interface

Flow control on an interface is a method of congestion management. It applies to all types of flows. The S2700
implements flow control on an interface by using the hardware backpressure mechanism. When an interface
works in full duplex mode, the S2700 implements flow control complying with IEEE 802.3x. When the interface
works in half duplex mode, the S2700 implements flow control through the backpressure mechanism.
When congestion occurs, the S2700 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.
Parent topic:
Ethernet Features
1.4.1.1.4.1.3 Traffic Suppression
Traffic suppression limits the number of unknown unicast packets, multicast packets, and broadcast packets
within a proper range to ensure network efficiency.
The S2700 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 S2700 discards excessive packets to keep
the traffic volume within the limit and thus services on the network run normally.
The S2700 can also control the percentage of unknown unicast packets, multicast packets, and broadcast packets
on an interface.
Parent topic:
Ethernet Features

1.4.1.1.4.1.4 VLAN

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