ATL Telecom R1-SW Ethernet Switch - Manual (Page 251)

Configuring LACP
12-3
Notes for LACP Trunk Configuration
When configuring and connecting the LACP trunk on the Corecess R1-SW24L2B, be aware of
the following:
y You can configure up to 256 trunking groups on the Corecess R1-SW24L2B.
y You can configure up to 16 ports in a trunking group.
y All trunk group members (ports) should have the same media type (10/100Base-T or Gigabit
Ethernet).
y All trunk group members (ports) should be set to the same port speed, tramsmission mode,
and flow control.
y All trunk group members (ports) should be set to the full-duplex mode.
y If LACP operation mode is set to active on a port that is located in the end of a trunk, trunk is
set automatically.
y STP, IGMP and QoS are applied to all trunks.
y Configured trunking groups by LACP can be connected, regardless a device vendor.
QoS of Trunk Group
When QoS is configured, a trunk group acts as single port. Instead, the maximum bandwidth
that is the same as total bandwidth of ports can be specified to the trunk group. QoS
configuration that was configured to ports before aggregation is not applied after aggregation.
If ports are released from the trunk group, previous QoS configuration is applied to ports again.
When a QoS trunk is specified, the aggregated ID of the trunk group is used. The aggregated ID
is decided by the following rules.
y Odd number of port > Gigabit Ethernet port > Even number of port (Up Î Down)
y The same add or even number : Higher number of port (Right Î Left)
For example, if 1/1, 1/2, 1/3 and 1/4 ports aggregates, odd number of ports (1/1, 1/3) is
selected properly, then higher port (1/3) is decided to the aggregated ID.