Amer Networks E5Web GUI - Manual (Page 165)

Percentage of errors in sent packets at which to declare a problem.
Default: 7
3.4.3. Link Aggregation
Where individual physical Ethernet interfaces of a Clavister Security Gateway cannot provide the
bandwidth required for a specific stream of traffic, it is possible to use the cOS Core Link
Aggregation feature to combine two or more physical interfaces together so they act as one
logical cOS Core interface. This feature is sometimes referred to by other security product
vendors using names such as Link Bundling and NIC Teaming.
For example, a Clavister Security Gateway might only have multiple one Gigabit Ethernet
interfaces but the requirement for a particular traffic flow is bandwidth of three Gigabits. A
logical Link Aggregation object could then be created which combines the capacities of three
physical interfaces. This object can then be used in the cOS Core configuration like any other
interface and can be part of the Route and the IPRule or IPPolicy objects that govern the traffic
flow. cOS Core will then automatically spread the traffic between the physical interfaces.
Note: Switch fabric connected interfaces cannot be used
Where a single logical interface consists of a number of physical interfaces connected
through a switch fabric on a Clavister hardware model, that logical interface cannot be
part of a link aggregation object.
This is the case for the logical gesw interface on the Clavister E5 and E7 hardware
products.
Physical Interface Requirements
The following are the requirements for the physical Ethernet interfaces associated with a
LinkAggregation configuration object in cOS Core:
• A maximum of 16 physical interfaces can be aggregated using one LinkAggregation
configuration object.
• All the physical interfaces must operate at the same link speed.
• All the physical interfaces must be connected to the same external switch
Configuring the Mode
The LinkAggregation object's Mode property and as the external switch are configured in either of
the following modes:
• Static
When the aggregation is static, cOS Core cannot know if one of the interfaces in the
aggregation is not working and will try to send the traffic anyway. There is no negotiation
taking place between cOS Core and the switch to which the aggregated interfaces are
connected.
This means that on link failure, a connection can be dropped entirely.
• LACP (Negotiated)
Chapter 3: Fundamentals
165