Interface Configuration
7750 SR OS Interface Configuration Guide Page 103
Configuring LAGs
LAG configuration guidelines include:
• When preprovisioning chassis slots, cards, MCMs, CMA/MDAs, and Ethernet ports,
distribute the LAG ports for a given LAG over as many slots and CMA/MDAs as
possible. This minimizes the impact that a slot or CMA/MDA failure has on the
performance of the LAG.
• A maximum of 200 LAGs, 16 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.
•The 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.
Figure 21 displays traffic routed between ALA-1 and ALA-2 as a LAG consisting of four ports.
Figure 21: LAG Configuration
OSSG011
ALA-1 ALA-4
ALA-2
LAG-1
LAG-2
ALA-3
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