H3C S6890 Series, Примеры настроек

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5
LACP MAD configuration
IMPORTANT:
For LACP MAD to run correctly, you must make sure the intermediate device supports extended
LACPDUs for LACP MAD.
To run LACP MAD, the IRF fabric and intermediate device must each have a dynamic Ethernet link
aggregation. LACP MAD cannot run on a static link aggregation.
If the intermediate device is also an IRF fabric, you must configure MAD for both IRF fabrics, and
assign the two IRF fabrics different domain IDs for correct split detection. This example uses a
four-chassis IRF fabric at the distribution layer. The access-layer and distribution-layer IRF fabrics
are the intermediate device of each other, as shown in
Figure 4 .
In this example, each member in the access-layer IRF fabric has only two links to the
distribution-layer IRF fabric. For high availability, you can connect each member in the access-layer
IRF fabric to each member in the distribution-layer IRF fabric. After you aggregate these links, they
are regarded as one link in the topology.
For quick split detection, assign high-speed ports for uplink aggregation connections. This example
uses 40-GE ports.
Figure 4 LACP MAD
Network connectivity configuration
In a Layer 2 network, IRF is typically used with link aggregation to simplify the network topology.
For high availability, you can connect each host or server to two ToR switches in the access-layer
IRF fabric, and aggregate the links. On each link aggregation, you do not need to run the spanning
tree protocol feature because an IRF fabric appears as one node in the network.
For VLAN tags to be processed correctly, assign ports and aggregate interfaces to the correct
VLANs.
NOTE:
A link aggregation could span one member device, some of the member devices, or all member
devices, depending on the link redundancy requirements and number of available links. The link
aggregation used for LACP MAD must span all member devices.