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.
