3Com Switch 7750 Configuration Guide Guide

184 CHAPTER 22: LINK AGGREGATION CONFIGURATION
2 When a manual or static aggregation group contains only one port, you cannot
remove the port unless you remove the whole aggregation group.
Configuring a Static
LACP Aggregation
Group
You can create a static LACP aggregation group, or remove an existing static
aggregation group (after that, the system will re-aggregate the original member
ports in the group to form one or more dynamic aggregation groups.).
You can manually add/remove a port to/from a static aggregation group, and a
port can only be manually added/removed to/from a static aggregation group.
n
For a static LACP aggregation group or a manual aggregation group, you are
recommended not to cross cables between the two devices at the two ends of the
aggregation group. For example, suppose port 1 of the local device is connected
to port 2 of the peer device. To avoid cross-connecting cables, do not connect port
2 of the local device to port 1 of the peer device. Otherwise, packets may be lost.
Note that:
■ LACP cannot be enabled on an existing port in a manual aggregation group.
■ You can add a LACP-enabled port to a manual aggregation group. In this case,
the system will disable LACP on the port automatically. Similarly, when you add
a LACP-disabled port to a static aggregation group, the system will enable
LACP on the port automatically.
Configuring a Dynamic
LACP Aggregation
Group
A dynamic LACP aggregation group is automatically created by the system based
on LACP-enabled ports. The adding and removing of ports to/from a dynamic
aggregation group are automatically accomplished by LACP.
You need to enable LACP on the ports whom you want to participate in dynamic
aggregation of the system, because, only when LACP is enabled on those ports at
both ends, can the two parties reach agreement in adding/removing ports to/from
dynamic aggregation groups.
n
Enabling LACP on a member port of a manual aggregation group will not take
effect.
Tabl e 116 Configure a static LACP aggregation group
Operation Command Description
Enter system view system-view -
Create a static aggregation
group
link-aggregation group
agg-id mode static
Required
Configure a description for
the aggregation group
link-aggregation group
agg-id description agg-name
Optional
By default, an aggregation
group has no description.
Enter Ethernet port view
interface interface-type
interface-number
-
Add the port to the
aggregation group
port link-aggregation
group agg-id
Required