Assuming we’re talking about the DCS-7500R-36CQ-LC, each of the 36 ports can operate as either 1 x 100G or breakout to 2 x 50G or 4 x 25G when populated with a 100G QSFP transceiver. If populated with a QSFP+ transceiver, each port can operate as either 1 x 40G or breakout to 4 x 10G. All port speed configuration changes are hitless and no ports are disabled or unavailable.
Note that you cannot have variable speeds on a single physical port. For given port, if broken out, will run at 4×10 if 40G-QSFP+ breakout option is used. Or if 100G-QSFP transceiver is used you can configure it at 2 x 50 or 4 x 25. You cannot mix speeds on a single port.
Please see this reference:
Can you provide details on specific linecard you ordered?
Generally, 100G interfaces on 7500R linecards are QSFP100. They can be broken down into 4x10G, 4x25G, or 2x50G. You can break the 100G into 2x25G plus 2x10G.
Please refer to the following 100G cabling guide : https://www.arista.com/assets/data/pdf/Arista100G_TC_QA.pdf
Correction – You can NOT mix speeds on breakout of a 100G interface.
Sorry for the confusion. I missed a word in my response.
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