ProLiant BL p-Class GbE2 Interconnect Switch Application Guide

Ports and trunking 37
c. Information about each configured trunk group is displayed. Make sure that trunk groups consist of the
expected ports and that each port is in the expected state.
Configurable Trunk Hash algorithm
This feature allows you to configure the particular parameters for the GbE2 Trunk Hash algorithm instead of
having to utilize the defaults. You can configure new default behavior for Layer 2 traffic and Layer 3 traffic, using
the CLI menu cfg/l2/thash. You can select a minimum of one or a maximum of two parameters to create one
of the following configurations:
• Source IP (SIP)
• Destination IP (DIP)
• Source MAC (SMAC)
• Destination MAC (DMAC)
• Source IP (SIP) + Destination IP (DIP)
• Source MAC (SMAC) + Destination MAC (DMAC)
Link Aggregation Control Protocol
Link Aggregation Control Protocol (LACP) is an IEEE 802.3ad standard for grouping several physical ports into
one logical port (known as a dynamic trunk group or Link Aggregation group) with any device that supports the
standard. Refer to the IEEE 802.3ad-2002 for a full description of the standard.
The 802.3ad standard allows standard Ethernet links to form a single Layer 2 link using the Link Aggregation
Control Protocol (LACP). Link aggregation is a method of grouping physical link segments of the same media type
and speed in full duplex, and treating them as if they were part of a single, logical link segment. If a link in a
LACP trunk group fails, traffic is reassigned dynamically to the remaining link/s of the dynamic trunk group.
NOTE: Currently, LACP implementation does not support the Churn machine, an option used to detect if the
port is operable within a bounded time period between the actor and the partner. Only the Market Responder
is implemented, and there is no marker protocol generator.
A port’s Link Aggregation Identifier (LAG ID) determines how the port can be aggregated. The Link Aggregation
ID (LAG ID) is constructed mainly from the system ID and the port’s admin key, as follows:
• System ID—The system ID is an integer value based on the switch’s MAC address and the system priority
assigned in the CLI.
• Admin key—A port’s Admin key is an integer value (1-65535) that you can configure in the CLI. Each
GbE2 port that participates in the same LACP trunk group must have the same admin key value. The Admin
key is local significant, which means the partner switch does not need to use the same Admin key value.