H3C Technologies H3C S5560 Series Switches - Manual (Page 63)

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• After the Selected port limit has been reached, a port joining the aggregation group is placed in
the Selected state if it is more eligible than a current member port.
For more information about configuring the maximum number of Selected ports in a dynamic
aggregation group, see " Setting the minimum and maximum numbers of Selected ports for an
aggregation group ."
Edge aggregate interface
Dynamic link aggregation fails on a server-facing aggregate interface if dynamic link aggregation is
configured only on the device. The device forwards traffic by using only one of the physical ports that are
connected to the server.
To improve link reliability, configure the aggregate interface as an edge aggregate interface. This
feature enables all member ports of the aggregation group to forward traffic. When a member port fails,
its traffic is automatically switched to other member ports.
After dynamic link aggregation is configured on the server, the device can receive LACPDUs from the
server. Then, link aggregation between the device and the server operates correctly.
An edge aggregate interface takes effect only when it is configured on an aggregate interface
corresponding to a dynamic aggregation group.
Load sharing modes for link aggregation groups
In a link aggregation group, traffic can be load shared across the Selected ports based on any of the
following modes:
• Per-flow load sharing—Load shares traffic on a per-flow basis. The load sharing mode classifies
packets into flows and forwards packets of the same flow on the same link. This mode can be one
or any combination of the following criteria that classify traffic:
{
Source or destination MAC address.
{
Source or destination port number.
{
Ingress port.
{
Source or destination IP address.
• Packet type-based load sharing—Load shares traffic automatically based on packet types (Layer 2,
IPv4, or IPv6 for example).
Ethernet link aggregation configuration task list
Tasks at a glance
(Required.) Configuring an aggregation group:
• Configuring a static aggregation group
• Configuring a dynamic aggregation group