Adding Link Aggregations - Hitachi 3080 Network Administration Manual

Adding link aggregations

To add a link aggregation
Procedure
1.
2.
3.
40
Status LED values:
• Green: OK
• Amber: Degraded
• Red: Unavailable
Navigate to Network Configuration > Link Aggregation, then click
add to display the Add Link Aggregation page.
Specify the configuration of the aggregation as required.
Verify the settings, then click OK to apply the settings, or cancel to
decline.
Field / Item Description
Name This field lists the available aggregation names. Select a name from the
list.
Available ports This field lists the available ge (gigabit Ethernet) and tg (10 GbE)
interfaces to add to the aggregation. To add an interface to the
aggregation, select the check box next to the name of the interface.
Use LACP This field specifies whether the aggregation uses LACP. An aggregation
that does not use LACP is called a static aggregation, and an
aggregation that does use LACP is called a dynamic aggregation.
Port level load This field displays the port load balancing scheme in use for all
interfaces in the aggregation.
balancing
The options are:
•
•
Configuring link aggregation
Hitachi NAS Platform Network Administration Guide
Normal - the server distributes all traffic for a given conversation
through one of the physical interfaces in the appropriate
aggregation. The server's hash and routing functions determine
which packets use which physical interfaces. For example, all traffic
for a particular TCP connection is always distributed through the
same physical interface (unless the link drops). However, the server
is not guaranteed to respond to the same client on the same
interface.
Round robin - the server selects outgoing interfaces in sequential
order, on a packet-by-packet basis. This aggregation load balancing
function ensures that all the interfaces are more or less equally
used. The disadvantage of round robin is that the clients must be
able to cope with out of order TCP traffic at high speed. The LACP
specification (802.3ad) requires that an implementation must follow
the appropriate rules to minimize out of order traffic and duplicated
packets. Round robin load balancing directly contravenes this
requirement. However, it can be useful when, for example, running
security scan request traffic, by increasing throughput.