7750 SR-7/12/12e and 7450 ESS-7/12

The fabric-speed-a parameter enables the chassis to operate at the following speeds using N+1 switch fabric redundancy:

up to 100 Gb/s per slot for the 7450 ESS-7/12 and the 7750 SR-7/12
up to 200 Gb/s per slot for the 7750 SR-12e

This parameter is compatible with SFM5, which allows a mixture of FP2- and FP3-based cards to coexist. This fabric speed is displayed as "6 Gig" in the show>chassis output.

The fabric-speed-b parameter enables the chassis to operate at the following speeds using N+1 switch fabric redundancy:

up to 200 Gb/s per slot for the 7450 ESS-7/12 and the 7750 SR-7/12
up to 400 Gb/s per slot for the 7750 SR-12e

This parameter is compatible with SFM5. All cards in the system must be FP3-based. The system does not support any FP2-based cards when the chassis is set to fabric-speed-b. This fabric speed is displayed as "10 Gig" in the show>chassis output.

Note: To set fabric-speed-b for the 7750 SR-7/12 and 7450 ESS-7/12, the chassis must support 200 Gb/s per slot capability. To check if the chassis supports fabric-speed-b, execute the show>system>switch-fabric command and verify that the ‟chassis is 200G/slot capable” message is displayed.

The fabric-speed-c parameter enables the use of both FP3- and FP4-based cards and is compatible with SFM6. This speed is mandatory if FP4 cards are used. The performance of FP3 cards is the same as fabric-speed-b. This fabric speed is displayed as "S4" in the show>chassis output.

Note: To set fabric-speed-c for the 7750 SR-7/12/12e and 7450 ESS-7/12, the chassis must support S4 fabric capability. To check if the chassis supports fabric-speed-c, execute the show>system>switch-fabric command and verify that the ‟chassis is s4 fabric capable” message is displayed.

If no fabric speed has previously been set on the chassis, either fabric-speed-a or fabric-speed-b is automatically selected and set based on the physically equipped cards. If no FP2-based cards are physically equipped and the chassis meets the required capabilities, fabric-speed-b is selected; if not, fabric-speed-a is selected.