NAME
aggr —
IEEE 802.1AX Link Aggregation network
interface
SYNOPSIS
pseudo-device aggr
DESCRIPTION
The aggr driver implements IEEE 802.1AX
(formerly 802.3ad) Link Aggregation for combining one or more Ethernet
interfaces into a single logical interface. The Link Aggregation Control
Protocol (LACP) is used to negotiate the aggregation of member interfaces
with a partner device.
aggr interfaces must be configured to use
one or more Ethernet interfaces as ports, and communicate with a partner
device over those ports using LACP. Member interfaces that negotiate with a
partner device are aggregated into a single logical link. Packets
transmitted through an aggr interface select an
aggregated interface for transmission. Packets received by an aggregated
device appear to be received by the aggr interface
it is a member of.
aggr interfaces can be created at runtime
using the ifconfig aggrN
create command or by setting up a
hostname.if(5) configuration file for
netstart(8). The interface itself can be configured with
ifconfig(8); see its manual page for more information.
A random MAC address is generated when an
aggr interface is created. A specific MAC address
can be assigned using the
ifconfig(8) command lladdr
etheraddr.
Other forms of aggregation of Ethernet interfaces are available using the trunk(4) driver.
EXAMPLES
Create an aggr virtual interface on top of
two physical interfaces:
# ifconfig aggr0 create # ifconfig aggr0 trunkport em0 # ifconfig aggr0 trunkport em1 # ifconfig aggr0 10.1.1.100/24 # ifconfig aggr0 up
SEE ALSO
inet(4), ip(4), netintro(4), trunk(4), hostname.if(5), ifconfig(8), netstart(8)
STANDARDS
IEEE 802.1AX Link Aggregation.
HISTORY
The aggr driver first appeared in
OpenBSD 6.6.