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 quad 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-8x port mode operation, the profile must first be set to restricted. In this case, this restriction means that the second port interface in the port group can only operate in a restricted mode. The restriction on the second port means that it must operate in a 1x mode, making the even ports unsuitable for connections to the MX8116n. Therefore, only the odd ports can be used for connections to the MX8116n.
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 quad 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
The even ports can be used for links to external networks and any port mode available can be used. The port mode shown for the even ports does not need to be kept at the setting in the example.
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 a 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:
Sleds 1 through sled 4 use Port 2 on the MX8116n, while sleds 5 through sled 8 use Port 1. The interfaces used on the Z9432F-ON in this example are arbitrary. Odd-numbered QSFP56-DD interfaces on the Z9432F-ON can be connected in any order.
For the 25 GbE quad 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 quad 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 quad 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 QSFP28-DD based optic or cable: