Link Aggregation

Features of Link Aggregation

Increased bandwidth – The capacity of multiple links is combined into one logical link.
Automatic failover/failback – Traffic from a failed link is failed over to working links in the aggregation.
Load balancing – Both inbound and outbound traffic is distributed according to user selected load-balancing policies, such as source and destination MAC or IP addresses.
Support for redundancy – Two systems can be configured with parallel aggregations.
Improved administration – All interfaces are administered as a single unit.
Less drain on the network address pool – The entire aggregation can be assigned one IP address.


Link aggregation configuration is bound by the following requirements:

Use dladm command to configure aggregations.

An interface that has been plumbed cannot become a member of an aggregation.

Interfaces must be of the GLDv3 type: xge, e1000g, and bge.

All interfaces in the aggregation must run at the same speed and in full-duplex mode.

Set the value for MAC addresses to “true” in the EEPROM parameter local-mac-address?

Create a aggregation

dladm create-aggr -d bge0 -d bge1 1

Configure and plumb the new aggregation
ifconfig aggrkey plumb IP-address up

Check the aggregation
dladm show-aggr

For link aggregations with IPv4 addresses, create an /etc/hostname.aggr.key file

#dladm show-link
# dladm create-aggr -d bge0 -d bge1 1
# ifconfig aggr1 plumb 192.168.84.14 up
# dladm show-aggr