Hi all,

I'm attempting to use the USRP E312 as a wifi node using the gr-ieee802.11
module...
though for now I'm testing basic USRP functionality with a couple of simple
GNU graphs.

Here's my setup:
- the host is an Ubuntu 18.04 virtual machine with a bridged adaptor.
Firewall disabled.
- the USRP is the E312, connected via ethernet to the host network.
- the host and USRP are both running GR3.8 and UHD4.0 (Zeus branch).
- the host can see the USRP with uhd_usrp_probe.
- the USRP is running the following GNU graph - UHD:USRP Source -> UDP Sink.
- host is running the following GNU graph - UDP Source -> QT GUI Sink.
- all block parameters are default.

I'm experiencing the following issues:
1. For sample rates > ~2Msps, the USRP spams overrun "O" and "D" characters
(what does the "D" signify?) , regardless of whether the host graph is
running or not.
2. At any sample rate the host graph spams the following message (when the
USRP graph is running) - "gr::log :WARN: udp_source0 - Too much data;
dropping packet."

And a question:
3. What sample rates are realistic for this setup, and what are the
limitations? wifi channels span 20MHz, so I'm hoping to run at 20Msps

Thanks,
Joe
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