Procedures Create Lag - Alcatel-Lucent 1850 User Provisioning Manual

Procedures
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Create LAG
Purpose
The system supports the Link Aggregation (LAG) at the Ethernet side, as specified in
IEEE Std. 802.3ad-2000; it is a technique to aggregate many data streams into a single
logical link. The resulting aggregate link will be treated by the system (with regard to
instances about IGMP, network protections, etc.), as a single link. It permits to overcome
the bandwidth limitation of the single ethernet interfaces, or to protect the traffic.
Permitted port rates to be aggregated are 1 Gbps and 10 Gbps (10 Mbps and 100 Mbps are
for future release). The max number of ports (LAG-size) to be aggregated is 16; (LAG
stands for Link Aggregation Group). Links may be anytime added or removed to/from the
bundle. Ports to be aggregated can be either located on the same board and also on
different boards.
Its management in the network is based upon the communication, between the aggregate
partner pieces of equipment, of LACP messages (Link Aggregation Control Protocol).
The LACP packets transport information about set-up, aggregation capability, links
failures, automatic reconfiguration after failure, etc. The benefits of Link Aggregation
feature are:
Bandwidth limitation overcoming.
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Load balancing (the traffic is distributed over the constituting links).
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Reliability increasing (in case that a link of the aggregate fails, its traffic will be
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automatically distributed over the other links of the aggregate).
The conditions for Link Aggregation option are the followings:
All involved ports must work at the same rate.
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All involved ports must have the same configurations, regarding AutoNegotiation and
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Flow Control.
All aggregated links must be point-to-point (Multicast is not allowed).
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All involved interfaces must work in full-duplex modality.
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All involved ports must be Local (Remote ports are not allowed).
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Actor and Partner ports (local and far sides) must be of the same type.
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1
Select AM node from the Tree area as shown in
window is displayed in the client area as shown in
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5 - 4
Figure 5-1. The Link Aggregation MN
Figure 5-2.
Create LAG
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Issue 1 February 2009