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  • 1.  Can't get 10G or 1G between Arista DCS-7050SX-64-R and Aruba 2930F

    Posted 28 days ago

    Hello, I have a strange problem and would value any insight.

    I can't get 10G port up between Aruba 2930F and Arista DCS-7050SX-64-R. SFP+ is used on both sides, Arista is using an original Arista transceiver, and Aruba is using Cisco transceiver with the command to use 3rd parties transceivers enabled. If I unplug the SFP from Arista and plug it to Fortigate, port comes up with no issues.

    Logs show nothing.

    When I try to force the port on Aruba 2930F, I don't even see option for 10G, only 10g auto. Tried to force SFP+ to 1G didn't work, tried 1G SFP on Aruba to SFP+ on Arista, also didn't work with negotiation or forcing.

    Aruba-VSF-2930F(eth-1/51)# speed-duplex 

     10-half               10 Mbps only, half duplex.

     100-half              100 Mbps only, half duplex.

     10-full               10 Mbps only, full duplex.

     100-full              100 Mbps only, full duplex.

     1000-full             1000 Mbps only, full duplex.

     auto                  Auto-negotiate link parameters.

     auto-10               10 Mbps only, auto-negotiate link parameters.

     auto-100              100 Mbps only, auto-negotiate link parameters.

     auto-2500             2500 Mbps only, auto-negotiate link parameters.

     auto-5000             5000 Mbps only, auto-negotiate link parameters.

     auto-2500-5000        2500 or 5000 Mbps only, auto-negotiate link parameters.

     auto-1000             1000 Mbps only, auto-negotiate link parameters.

     auto-10-100           10 or 100 Mbps only, auto-negotiate link parameters.

     auto-1000-2500        1000 or 2500 Mbps only, auto-negotiate link parameters.

     auto-1000-2500-5000   1000, 2500, or 5000 Mbps only, auto-negotiate link parameters.

     auto-10g              10 Gbps only, auto-negotiate link parameters.

    On Arista, I can't force any port to anything except 10G, but transceivers are SFP+ from Arista.

    LEAF2-DCS-7050SX-64-R(config-if-Et37)#speed forced ?

      10000full  Disable autoneg and force 10 Gbps/full duplex operation

      1000full   Disable autoneg and force 1 Gbps/full duplex operation

      1000half   Disable autoneg and force 1 Gbps/half duplex operation

      100full    Disable autoneg and force 100 Mbps/full duplex operation

      100gfull   Disable autoneg and force 100 Gbps/full duplex operation

      100half    Disable autoneg and force 100 Mbps/half duplex operation

      10full     Disable autoneg and force 10 Mbps/full duplex operation

      10half     Disable autoneg and force 10 Mbps/half duplex operation

      40gfull    Disable autoneg and force 40 Gbps/full duplex operation

    LEAF2-DCS-7050SX-64-R(config-if-Et37)#speed forced 1000full

    % Speed and duplex settings are not compatible with transceiver for interface Ethernet37.

    Can't even do speed auto

    LEAF2-DCS-7050SX-64-R(config-if-Et37)#speed auto

    % Speed and duplex settings are not compatible with transceiver for interface Ethernet37.

    LEAF2-DCS-7050SX-64-R(config-if-Et37)#

    Any ideas?



  • 2.  RE: Can't get 10G or 1G between Arista DCS-7050SX-64-R and Aruba 2930F

    Posted 28 days ago

    Hi.

    What is the model number of the 2930F, the SKU ?

    What firmware ?




  • 3.  RE: Can't get 10G or 1G between Arista DCS-7050SX-64-R and Aruba 2930F

    Posted 28 days ago
    Aruba 2930F 48G 4SFP+
    Firmware is WC.16.05.0007





  • 4.  RE: Can't get 10G or 1G between Arista DCS-7050SX-64-R and Aruba 2930F

    Posted 27 days ago

    Suppose the SKU is JL254A ?

    A 10G transceiver (XCVR) runs 10Gbit, if you need to run 1Gbit, you should use 1G XCVR in both ends.

    Whether the port is 1G or 10G is normally decided by the inserted XCVR.

    Check if you can see the XCVR in the CLI or WebUI of the switches, use the right XCVR with matching wavelenght.

    If every checks out OK, then try to swap the fiber cable connectors in one end.




  • 5.  RE: Can't get 10G or 1G between Arista DCS-7050SX-64-R and Aruba 2930F

    Posted 27 days ago

    Hi

     

    Could you please check/confirm the following:

    • Do you intend to achieve a 10G connection between the two switches?
    • What transceiver type are you using on Aruba side (exact model)?
    • What transceiver typer are you using on Arista side (exact model)?
    • What type of cable are you using?
    • What do you mean by "I can't get 10G port up"? What do you observe regarding status of link / RX power readouts on the SFP+ transceivers etc.?

     

    Downgrading a 10G SFP+ transceiver to 1G is something that does not necessarily work. As both of your switches support 10G, you should be able to connect them with 10G speed.

     

    Regards,

    Thomas

     






  • 6.  RE: Can't get 10G or 1G between Arista DCS-7050SX-64-R and Aruba 2930F

    Posted 27 days ago

    I'd like to jump on this list of questions ...
    Why? Because they are very relevant to understand the problem.

     

    First and foremost: 10G does not necessarily equal to 10G; although, nowadays, they usually all make use of SFP(+) form factor transceivers.

     

    There are several 10G fiber standards out there:

    • E.g. 10GBase SR, LRM, ... (running on multimode fiber [MMF])
    • E.g. 10GBase LR, ER, ... (running on singlemode fiber [SMF])

     

    So, several factors kick in here: 10G standard, fiber type, fiber quality and length, and eventually even connector type (although usually we see LC).

     

     

    To get an exhaustive basic info of all these parameters, particularly with focus on HPE Aruba Networking switching gear, please feel free to read this excellent transceiver guide!
    (In your case, particularly the Overview and SFP+ chapters should be of focus)

     

     

     

    Summing up:

    If both sides of the cable (or cable run) are using the very same 10G standard with transceivers supported by the switch vendor(s) (Aruba transceiver in Aruba switch, Arista transceiver in Arista switch), and running on supported fiber type ...

    ... then usually the link should come up without issues. No need to set speed/duplex/whatever settings.

     

     

     






  • 7.  RE: Can't get 10G or 1G between Arista DCS-7050SX-64-R and Aruba 2930F

    Posted 27 days ago

    Hi! as others already pointed out..an SFP+ Fiber Option Transceiver - generally speaking and AFAIK - supports only 10Gbps fixed speed. That is going to work that way on both sides. Given that, if on both sides the relevant SFP+ Transceivers are correctly recognized, the issue should be in the "medium" placed in the middle between them (Multi-Mode Fiber Optic - for Short Range - cabling? Tx/Rx LC connectors? etc.).




  • 8.  RE: Can't get 10G or 1G between Arista DCS-7050SX-64-R and Aruba 2930F

    Posted 26 days ago

    Thank you all for useful comments and suggestions. I will have a colleague in the DC tomorrow and he is bringing additional SFP+ and 1G interfaces, so we can try 10G to 10G or 1G to 1G. If we still can't get the ports up, I will gather all the useful transceiver logs from the switches.

    I will update about the status tomorrow. Thank you all!