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-rw-r--r--host/lib/usrp/usrp2/usrp2_impl.cpp6
1 files changed, 6 insertions, 0 deletions
diff --git a/host/lib/usrp/usrp2/usrp2_impl.cpp b/host/lib/usrp/usrp2/usrp2_impl.cpp
index cb4d793ab..505df662a 100644
--- a/host/lib/usrp/usrp2/usrp2_impl.cpp
+++ b/host/lib/usrp/usrp2/usrp2_impl.cpp
@@ -208,6 +208,12 @@ static mtu_result_t determine_mtu(const std::string &addr){
else max_send_mtu = mtu.send_mtu - 4;
}
+ //don't trust the discovery if it lands slightly above default MTU
+ if (mtu.recv_mtu > udp_simple::mtu and mtu.recv_mtu <= udp_simple::mtu + 16)
+ mtu.recv_mtu = udp_simple::mtu;
+ if (mtu.send_mtu > udp_simple::mtu and mtu.send_mtu <= udp_simple::mtu + 16)
+ mtu.send_mtu = udp_simple::mtu;
+
return mtu;
}