3Com S7902E, Руководство по настройке

Страница: 2581 / 2621

1-5
IRF merge
As shown in Figure 1-3 , two IRFs operate independently and steadily. You can connect them physically
and perform necessary configurations to make them form one IRF, and this process is IRF merge.
Figure 1-3 IRF merge
IRF split
As shown in Figure 1-4 , after an IRF is formed, the failure of the IRF link causes physical disconnection
between two devices, and then the IRF becomes two IRFs. This process is IRF split.
Figure 1-4 IRF split
Member priority
Member priority is a property of a member device and decides the role of the member device during a
role election process. The greater the priority value, the higher the priority. A member with a higher
priority is more likely to be a master. The priority of a device defaults to 1. You can modify the priority
through command lines.
IRF Working Process
IRF management involves four stages: Physical Connections , Topology Collection , Role Election , and
IRF Management and Maintenance . You need to first connect the IRF members physically, and then the
devices will perform topology collection and role election, after that the IRF system can operate
normally and enter the IRF management and maintenance stage.
Physical Connections
To make an IRF operate normally, you need to connect the IRF members physically. Physical ports
used for IRF connection on devices are called physical IRF ports.
You need to bind a physical IRF port to an IRF port. As a logical port, an IRF port can bind to one
physical IRF port or, to realize link backup, can bind to multiple physical IRF ports (known as aggregate
IRF port). The binding between a physical IRF port and an IRF port varies with device models.
The S7900E series uses 10 GE optical ports as physical IRF ports. You can connect physical IRF ports
with fibers. Fibers connect physical devices located very far from each other and provide flexible
application.