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 fabric settings rack-mct-ports and
rack-ld-mct-ports, 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 is 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 |