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Is this possible? Our setup:

  • Core switching: Catalyst 2960-X
    • 48 x 1GbE RJ-45 ports
    • 2 x 10GbE SFP+
    • Uplinks between switches are RJ-45. We plan to get rid of these and use a 10G switch for switch-to-switch uplinks in the near future.
  • Appliance: QuantaPlex T41S-2U Blade Server
    • 8 x 10GbE SFP+ ports (each blade has two)

We want to utilize the 10GbE SFP+ ports on the Catalysts for the time being as we have not received our 10GbE switch and would like to do some testing with the appliance while we wait for the switch to arrive.

Right now, the blades see that they are connected to a switch, but are not able to get an IP manually or via DHCP in Windows and Linux. I initially thought this may have been an issue with the SFP+ DACs, but it appears to not be the case. We have tried doing this with and without LACP, with no progress in either case.

DACs are Cisco SFP-H10GB-CU5M.

Brendan Lovett
  • 31

1 Answers1

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The "uplink" ports on a Cisco 2960-X switch will work exactly like any other port (albeit with more speed options), and the behaviour will depend on the config applied to the port.

If the link layer is up thanks to the DAC, then the ports will work fine assuming that the config is appropriate at each end. I would try setting them as static access ports and be very certain that the ports are in the same VLAN as your DHCP server.

You could post here the config lines from an example 1G port and the 10G ports.

Daniel K
  • 697