This example shows a single MX8116n that can be installed in any fabric slot in either A or B. The diagram and table show only one slot of the fabric connecting to a single Z9432F-ON. Typically, a second MX8116n and Z9432F-ON are part of the deployment, but they are not shown in this example. The information would be the same for the second pair.
On the Z9432F-ON, the following port group settings are required for 25 GbE dual port mezzanine cards. Each port group contains two interfaces. The following example shows port groups 1/1/1 and 1/1/16, which contain the port interfaces 1/1/1 and 1/1/31. For the required 25g-4x port mode operation, the profile should stay in the default unrestricted setting. Unlike quad port deployments, dual port deployments can use both even and odd ports on the Z9432F-ON.
Within the port-group, both the profile and the port mode for each port interface can be configured. The following configuration shows the final state required for 25 GbE dual port mezzanine cards:
port-group 1/1/1
profile restricted
port 1/1/1 mode Eth 25g-8x
port 1/1/2 mode Eth 400g-1x
port-group 1/1/16
profile restricted
port 1/1/31 mode Eth 25g-8x
port 1/1/32 mode Eth 400g-1x
Once the port modes are configured and the connections are made, the MX8116n ports auto-negotiate to match the port operating mode of the Z9432F-ON interfaces. The internal server facing ports of the MX8116n auto-negotiate with the mezzanine card port speed of 25 GbE.
The following figure shows the interface numbering for each sled and corresponding MX8116n port when using a QSFP56DD based optic or cable:
Sled 1 through sled 4 use Port 2 on the MX8116n, while sled 5 through sled 8 use Port 1. The interfaces used on the Z9432F-ON in this example are arbitrary. QSFP56-DD interfaces on the Z9432F-ON can be connected in any order.
For the 25 GbE dual port mezzanine card solution, there is an option to use QSFP28-DD based optics and cables. The following configuration shows the final state required for 25 GbE dual port mezzanine cards.
Within the port-group, both the profile and the port mode for each port interface can be configured. The following configuration shows the final state required for 25 GbE dual port mezzanine cards:
port-group 1/1/1
profile unrestricted
port 1/1/1 mode Eth 25g-4x
port 1/1/2 mode Eth 400g-1x
port-group 1/1/16
profile unrestricted
port 1/1/31 mode Eth 25g-4x
port 1/1/32 mode Eth 400g-1x
Once the port modes are configured and the connections are made, the MX8116n ports auto-negotiate to match the port operating mode of the Z9432F-ON interfaces. The internal server facing ports of the MX8116n auto-negotiate with the mezzanine card port speed of 25 GbE.
The following figure shows the interface numbering for each sled and corresponding MX8116n port when using a QSFP28-DD based optic or cable: