SNR S2989G-24TX-UPS [89/553] Static lacp aggregation

Превью страниц Страница 89 / 553

2-25

S2989G-24TX Operation Manual Chapter 2 Layer 2 services

Configuration

The port aggregation is that multi-ports are aggregated to form an aggregation group,

so as to implement the out/in load balance in each member port of the aggregation group

and provides the better reliability.

2.6.2.1 Static LACP Aggregation

Static LACP aggregation is enforced by users configuration, and do not enable LACP

protocol. When configuring static LACP aggregation, use “on” mode to force the port to

enter the aggregation group.

2.6.2.2 Dynamic LACP Aggregation

1. The summary of the dynamic LACP aggregation

Dynamic LACP aggregation is an aggregation created/deleted by the system

automatically, it does not allow the user to add or delete the member ports of the dynamic

LACP aggregation. The ports which have the same attribute of speed and duplex, are

connected to the same device, have the same basic configuration, can be dynamically

aggregated together. Even if only one port can create the dynamic aggregation, that is the

single port aggregation. In the dynamic aggregation, LACP protocol of the port is at the

enable state.

2. The port state of the dynamic aggregation group

In dynamic aggregation group, the ports have two states: selected or standby. Both

selected ports and standby ports can receive and send LACP protocol, but standby ports

can not forward the data packets.

Because the limitation of the max port number in the aggregation group, if the current

number of the member ports exceeds the limitation of the max port number, then the

system of this end will negotiates with the other end to decide the port state according to

the port ID. The negotiation steps are as follows:

Compare ID of the devices (the priority of the system + the MAC address of the

system). First, compare the priority of the systems, if they are same, then compare the

MAC address of the systems. The end with a small device ID has the high priority.

Compare the ID of the ports (the priority of the port + the ID of the port). For each port

in the side of the device which has the high device priority, first, compare the priority of the

ports, if the priorities are same, then compare the ID of the ports. The port with a small

port ID is selected, and the others become the standby ports.

In an aggregation group, the port which has the smallest port ID and is at the selected

state will be the master port, the other ports at the selected state will be the member port.

2.6.3

Port Channel Configuration Task List