to connect to other bridges. Under RSTP, all ports operating in full-duplex mode are considered to be P2P ports,
unless manually overridden through configuration.
The link type attached to this port could be selected as following:
。 Auto - The switch automatically determines if the interface is attached to a point-to-point link or to shared
media
。 True – A connection to exactly one other bridge.
。 False - A connection to two or more bridges.
Port Priority: Defines if this port is more or less likely to become the root port. The range is from 0 to 255, the
default setting is 128.The lower number has the highest priority.
Path Cost: Specifies the path cost of the port. The switch uses this parameter to help determine which port will
become a forwarding port. Lower numbers will be used as forwarding ports first. The range is from 0 to 65535. The
default values based on IEEE802.1D are: 10Mb/s = 50-600, 100Mb/s = 10-60, 1000Mb/s = 3-10
4.6.3 Link Aggregation
The Link Aggregation Control Protocol (LACP) provides a standardized means for exchanging information
between Partner Systems that require high speed redundant links. Link aggregation lets you group up to eight
consecutive ports into a single dedicated connection. This feature can expand bandwidth to a device on the
network. LACP operation requires full-duplex mode, more detail information refer to the IEEE 802.3ad standard.
Link aggregation can be used to increase the bandwidth of a network connection or to ensure fault recovery. Link
aggregation lets you group up consecutive ports into a single dedicated connection between any two of the
Switches or other Layer 2 switches. However, before making any physical connections between devices, use the
Link Aggregation menu to specify the link aggregation on the devices at both ends. When using a port link
aggregation, note that:
。 The ports used in a link aggregation must all be of the same media type (RJ-45, 100 Mbps fiber).
。 The ports that can be assigned to the same link aggregation have certain other restrictions (see below).
。 Ports can only be assigned to one link aggregation.
。 The ports at both ends of a connection must be configured as link aggregation ports.
。 None of the ports in a link aggregation can be configured as a mirror source port or a mirror target port.
。 All of the ports in a link aggregation have to be treated as a whole when moved from/to, added or deleted
from a VLAN.
。 The Spanning Tree Protocol will treat all the ports in a link aggregation as a whole.
。 Enable the link aggregation prior to connecting any cable between the switches to avoid creating a data
loop.
。 Disconnect all link aggregation port cables or disable the link aggregation ports before removing a port link
aggregation to avoid creating a data loop.
