inS_cnge2fe16MS_reV–
01/11/12 Page 59
INSTALLATION AND OPERATION MANUAL
CNGE2FE16MS
TECh SUPPORT: 1.888.678.9427
Port Trunk
Port-trunking is the combination of several ports or network cables in order to expand the
connection speed beyond the limits of any one single port or network cable. Link Aggregation
Control Protocol (LACP), which is a protocol running on layer 2, provides a standardized means in
accordance with IEEE 802.3ad to bundle several physical ports together to form a single logical
channel. All the ports within the logical channel or so-called logical aggregator work at the same
connection speed and LACP operation requires full-duplex mode.
Aggregator Setting
Please read the instructions below and refer to Figure 66 to make an LACP or non-LACP trunk group.
»
System Priority
: A value that is used to identify the controlling switch of an LACP link system.
The switch with the lower value has the higher system priority and is selected as the controlling
end, which controls port priorities, of the LACP link system.
»
Group ID
: There are four trunk groups to be selected. Assign the group ID to the particular
trunk group.
»
LACP
: Select the pull-down menu to enable/disable LACP for the trunk group. With LACP
enabled, a port that joins an
LACP trunk group
has to make an agreement with its member
ports first. Please notice that a trunk group, including member ports split between two
switches, has to enable the LACP function of the two switches. When disabled, the trunk group
is a
static trunk group
. The advantage of having the LACP disabled is that a port joins the trunk
group without any handshaking with its member ports; but member ports won’t know that they
should be aggregated together to form a logic trunk group.
»
Work Ports
: This field allows the user to type in the total number of active ports up to four.
With a
LACP trunk group
employed, for example you assign four ports to be the members of a
trunk group whose Work Ports field is set as two the excessive ports will be standby/redundant
ports and can be aggregated instead of working ports that fail. As for the
static trunk group
(non-LACP), the number of work ports must equal the total number of the group member
ports.
»
The system allows a maximum of four ports to be aggregated in a trunk group. Having
configured the parameters above, highlight the ports in the right list box to join the trunk
group. Select the
Add
button and the ports highlighted in the right list box will be shifted to
the left list box. To remove unwanted ports, select the ports in the left list box and select the
Remove
button.
»
When LACP enabled, you can configure LACP Active/Passive states for each member port on
the
State Activity
tab.
»
When finished, select
Apply
to take the configuration take effect.
»
To remove a trunk group, select the Group ID by selecting the pull-down menu labeled as
Group ID
and select then select the
Delete
button.
