XCO supports both Static and Dynamic ICL.
Prior to EFA 2.6.0, ports were defined statically to be part of the ICL or MCT port-channel (Static ICL) using the following fabric settings for a non-Clos fabric:
The fabric settings had the default values which could be modified based on the inter-connectivity between the MCT devices.
From EFA 2.6.0 onwards, the fabric settings, which were used to define the static ICL ports, are removed from XCO to support Dynamic ICL. In a dynamic ICL, all the ports inter-connecting the MCT devices will automatically participate in the ICL or MCT port-channel.
The Dynamic ICL is the default behavior. The static ICL support is applicable only for a non-Clos fabric.
For the fabrics created prior to XCO 3.3.0, the Dynamic ICL will continue to be
effective. You can transition to static ICL by modifying the rack-mct-scheme, rack-mct-ports, and
rack-ld-mct-ports fabric settings.
For the fabrics created from XCO 3.3.0 onwards, the default behavior is Dynamic ICL
unless you choose to provide the rack-mct-scheme, rack-mct-ports, and rack-ld-mct-ports fabric
settings.
When you choose static ICL scheme and the ports inter-connecting the MCT devices do not
contain all the ports provided in the rack-mct-ports and rack-ld-mct-ports fabric
settings, system shows errors in the “efa fabric show”, “efa fabric error show”, and the
“efa fabric health show” output when you add devices in fabric (fabric device add).
Note
rack-mct-ports and
rack-ld-mct-ports are applicable to all the high density and low
density racks respectively.rack-mct-ports is applicable for the
platforms with high density ports (devices with higher number of ports) and
rack-ld-mct-ports is applicable for the platforms with low
density platforms (devices with lower number of ports).| Low density hardware platforms | High density hardware platforms |
|---|---|
| SLX 9250, SLX 9240, SLX 9640, SLX 9740_40C, SLX 9740_80C, Extreme 8720, Extreme 8820_40C, Extreme 8820_80C, CelesticaNRU (S301BD), and CelesticaNRU (0301BD) | SLX 9540, SLX 9030, SLX 9030T, SLX 9140, SLX 9150, SLX 9150F, Extreme 8730, Extreme 8740, Extreme 8520, and Extreme 8520T |