Features Specifications
Use A link aggregation group virtual interface can be used for the
following point-to-point connections:
server-to-server
server-to-switch
Operating Support provided with Patch Kit 1 for Tru64 UNIX Version 5.1A
Systems
Standards IEEE 802 (IEEE Standards Association [1] )
Description
===========
Link aggregation, or trunking, enables administrators to combine one or more
physical Ethernet NICs and create a single logical link. (Upper-layer
software sees this link aggregation group as a single logical interface.)
The single logical link can carry traffic at higher data rates than a single
interface because the traffic is distributed across all of the physical
ports that make up the link aggregation group.
Features
========
Increased network bandwidth
The increase is incremental based on the number and type of
ports, or NICs, added to the link aggregation group.
Fault tolerance
If a port in a link aggregation group fails, the software
detects the failure and reroutes traffic to the other available
ports.
This capability is available for DEGPA (alt) and DE60x (ee)
devices only.
Load sharing
A link aggregation group performs load sharing of both
inbound and outbound traffic.
When transmitting packets, the system uses a load
distribution algorithm to determine on which attached port to
transmit the packets.
The following load distribution algorithm is supported:
For IP packets, the port is selected based on a hash of
the destination IP address.
For non-IP packets, the port is selected based on a hash
of the destination MAC address.
All traffic addressed to a specific destination system
uses the same port in the link aggregation group. This ensures
that the packets arrive in order.
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