Configuring Lags; Figure 14: Lag Configuration - Alcatel-Lucent 7750 SR OS Interface Configuration Manual

Configuring LAGs

LAG configuration guidelines include:
•
•
•
•
•
•
Figure 14
7750 SR OS Interface Configuration Guide
When preprovisioning chassis slots, cards, MDAs, and Ethernet ports, distribute the LAG
ports for a given LAG over as many slots and MDAs as possible. This minimizes the
impact that a slot or MDA failure has on the performance of the LAG.
A maximum of 200 LAGs, eight ports in each, can be configured on a 7750 SR. The 7750
SR-1 supports a maximum of 64 LAGs.
Ports can be added or removed from the LAG while the LAG and its ports (other than the
port being removed) remain operational. When ports to and/or from the LAG are added or
removed, the hashing algorithm is adjusted for the new port count.
show commands display physical port statistics on a port-by-port basis or the entire LAG
can be displayed.
LAG is supported on Ethernet ports.
Ports of a particular LAG can be of different types but they must be the same speed and
duplex. To guarantee the same port speed is used for all ports in a LAG, autonegotiation
must be disabled or in limited mode to ensure only a specific speed is advertised. For
10GBE ports, the xgig setting must be set to the same value.
displays traffic routed between ALA-1 and ALA-2 as a LAG consisting of four ports.
LAG-1
ALA-1
LAG-2

Figure 14: LAG Configuration

ALA-2
ALA-4
ALA-3
OSSG011
Interface Configuration
Page 71