Hello,

I am using stable_18_01.
I have been observing a delay in setting the 10G NIC interface state to UP.
It is apparent from VPP CLI itself that using “set interface state 
TenGigabitEthernet3/0/0 up” taking some time.

And I also see that the SHM client api “sw_interface_set_flags” fails in 
timeout at the below code snippet.

Client code for setting the interface flags..

   /* Construct the API message */
   M (SW_INTERFACE_SET_FLAGS, mp);
   mp->sw_if_index = ntohl (msgp->sw_if_index);
   mp->admin_up_down = msgp->admin_up_down;

   S (mp);
   W (ret);


And I get “ret” value as “-99” from W(ret) as it times-out for waiting for the 
response from VPP.

/* W: wait for results, with timeout */
#define W(ret)                                                  \
do {                                                            \
    f64 timeout = vat_time_now (vam) + 1.0;                     \
    socket_client_main_t *scm = &vam->socket_client_main;   \
    ret = -99;                                                  \
                                                                \
    vl_socket_client_read_reply (scm);                          \
    while (vat_time_now (vam) < timeout) {                      \
        if (vam->result_ready == 1) {                           \
            ret = vam->retval;                                  \
            break;                                              \
        }                                                       \
        vat_suspend (vam->vlib_main, 1e-5);                     \
    }                                                           \
} while(0);


This is the dpdk information from dpdk.

Network devices using DPDK-compatible driver
============================================
0000:03:00.0 'Ethernet Connection X552/X557-AT 10GBASE-T 15ad' drv=vfio-pci 
unused=uio_pci_generic
0000:03:00.1 'Ethernet Connection X552/X557-AT 10GBASE-T 15ad' drv=vfio-pci 
unused=uio_pci_generic
0000:05:00.0 'I350 Gigabit Network Connection 1521' drv=vfio-pci 
unused=uio_pci_generic
0000:05:00.1 'I350 Gigabit Network Connection 1521' drv=vfio-pci 
unused=uio_pci_generic

Is this a known issue? Do you have any fix/suggestion?

Thanks,
Leela sankar
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