Re: [Discuss-gnuradio] Not able to find USRP N310 in host mode

[Marcus D. Leech]

On 10/23/2019 11:00 PM, Karthik Vasudeva wrote:

I tried uhd_usrp_probe again but still the same problem. Please find the below error message

kvasude2@veneno:~$ uhd_usrp_probe --args addr=192.168.10.2
[INFO] [UHD] linux; GNU C++ version 7.4.0; Boost_106501; UHD_3.14.1.HEAD-0-g0347a6d8
Error: LookupError: KeyError: No devices found for ----->
Device Address:
    addr: 192.168.10.2

https://kb.ettus.com/USRP_N300/N310/N320/N321_Getting_Started_Guide#Connecting_the_Device

Also, find the below message from the embedded system showing the IP of the SFP0 port for the reference.

root@ni-n3xx-3198219:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:80:2f:26:50:f8 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.102/24 brd 192.168.1.255 scope global dynamic eth0
       valid_lft 86266sec preferred_lft 86266sec
3: sfp0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8000 qdisc pfifo_fast qlen 1000
    link/ether 00:80:2f:26:50:f9 brd ff:ff:ff:ff:ff:ff
    inet 192.168.10.2/24 brd 192.168.10.255 scope global sfp0
       valid_lft forever preferred_lft forever
4: sfp1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 8000 qdisc pfifo_fast qlen 1000
    link/ether 00:80:2f:26:50:fa brd ff:ff:ff:ff:ff:ff

Karthik

So, something you need to understand about the N310 device is that it has an RJ45 port that is used both for "management and control"
  traffic from UHD, and is also an SSH destination, etc, etc.

The SFP ports are strictly for streaming, so you need to use "mgmt_addr=<the-addr-of-that-rj45>,addr=192.168.10.2" in the device address,
  and you need a connection for that RJ45 as well.  HOWEVER, if you're streaming at lower rates (those that can be supported over the
  RJ45), you can simply use that RJ45 connection, and ignore the SFP connections.

More here:

https://kb.ettus.com/USRP_N300/N310/N320/N321_Getting_Started_Guide#Connecting_the_Device