Router for Audio Streaming

Thank you, @yage !  I ran the 'netstat -s' command and I see a bunch of lines in the TCP section but no '... discarded for bad checksum'.  What segment of time does this command cover?

For whatever it's worth, in the UTP section I get:

    396308 datagrams received
        0 with incomplete header
        0 with bad data length field
        0 with bad checksum
        1 with no checksum
        330384 checksummed in software
            246184 datagrams (53642392 bytes) over IPv4
            84200 datagrams (18592713 bytes) over IPv6
        351 dropped due to no socket
        80576 broadcast/multicast datagrams undelivered
        0 time multicast source filter matched
        36642 dropped due to full socket buffers
        0 not for hashed pcb
        278739 delivered
    130000 datagrams output
        138955 checksummed in software
            107355 datagrams (38385652 bytes) over IPv4
            31600 datagrams (6833860 bytes) over IPv6

Have no clue what all this means....

Cheers!

To @soix :

Magna Mano Ultra LMS streamer
RME ADI-2-DAC FS dac
Sony SCD-XA5400ES CD/SACD player
Thorens TD 166 MkII turntable w/ Shure V15VxMR and JICO stylus

Parallel stereo systems playing together in same room from common source:

System A:
Bryston BP-25 preamp
Bryston 4B SST amp
JBL L150A speakers

System B:
NAD C165BEE preamp (and overall source selector)
NAD C272 amp
Magneplanar MG1.6/QR speakers

Pretty kooky, huh?

I would first order a new one from Amazon or Best Buy before I tried a factory reset.

Good, compare, keep or return new one.

Bad, new one at your fingertips!

@yoramguy1 

It appears those are network stats for UDP (user datagram protocol). It's another protocol that's used in conjunction with IP, usually for applications that don't require reliable data transmission. The TCP section should be the first displayed. You can try the command 'netstat -s | less'. The vertical line before less is the pipe character (hold shift and press the backslash key). You can now scroll through the output with arrow or pgup / pgdn keys. Here's an example of output for the TCP section when I run netstat -s as root on my Mac (output truncated for length):

tcp:
        6094285 packets received
                5166105 packets (3033536317 byte) received in-sequence
                3831 completely duplicate packets (2903268 bytes)
                103 old duplicate packets
                0 received packet dropped due to low memory
                32 packets with some dup. data (11212 bytes duped)
                589 packets received after close
                47 bad resets
                0 discarded for bad checksum

Here's the columns of output of netstat -i for my wi-fi adapter showing Ethernet stats:

Ipkts       Ierrs    Opkts       Oerrs  
6697785     0        6257972     0

Ierrs shows how many errors the wi-fi adapter encountered out of the number under Ipkts received.

@yage , thanks!  Here is the tcp dump:

tcp:
    0 packet sent
        0 data packet (0 byte)
        0 data packet (0 byte) retransmitted
        0 resend initiated by MTU discovery
        0 ack-only packet (0 delayed)
        0 URG only packet
        0 window probe packet
        0 window update packet
        0 control packet
        0 data packet sent after flow control
        0 challenge ACK sent due to unexpected SYN
        0 challenge ACK sent due to unexpected RST
        0 checksummed in software
            0 segment (0 byte) over IPv4
            0 segment (0 byte) over IPv6
    0 packet received
        0 ack (for 0 byte)
        0 duplicate ack
        0 ack for unsent data
        0 packet (0 byte) received in-sequence
        0 completely duplicate packet (0 byte)
        0 old duplicate packet
        0 received packet dropped due to low memory
        0 packet with some dup. data (0 byte duped)
        0 out-of-order packet (0 byte)
        0 packet (0 byte) of data after window
        0 window probe
        0 window update packet
        0 packet recovered after loss
        0 packet received after close
        0 bad reset
        0 discarded for bad checksum
        0 checksummed in software
            0 segment (0 byte) over IPv4
            0 segment (0 byte) over IPv6
        0 discarded for bad header offset field
        0 discarded because packet too short
    0 connection request
    0 connection accept
    0 bad connection attempt
    0 listen queue overflow
    0 connection established (including accepts)
    0 connection closed (including 0 drop)
        0 connection updated cached RTT on close
        0 connection updated cached RTT variance on close
        0 connection updated cached ssthresh on close
        0 connection initialized RTT from route cache
        0 connection initialized RTT variance from route cache
        0 connection initialized ssthresh from route cache
    0 embryonic connection dropped
    0 segment updated rtt (of 0 attempt)
    0 retransmit timeout
        0 connection dropped by rexmit timeout
        0 connection dropped after retransmitting FIN
        0 unnecessary packet retransmissions
    0 persist timeout
        0 connection dropped by persist timeout
    0 keepalive timeout
        0 keepalive probe sent
        0 connection dropped by keepalive
        0 connection dropped by keepalive offload
    0 correct ACK header prediction
    0 correct data packet header prediction
    0 SACK recovery episode
    0 segment rexmit in SACK recovery episodes
    0 byte rexmit in SACK recovery episodes
    0 SACK option (SACK blocks) received
    0 SACK option (SACK blocks) sent
    0 SACK scoreboard overflow
    0 limited transmit done
    0 early retransmit done
    0 time cumulative ack advanced along with SACK
    0 probe timeout
        0 time retransmit timeout triggered after probe
        0 time probe packets were sent for an interface
        0 time couldn't send probe packets for an interface
        0 time fast recovery after tail loss
        0 time recovered last packet
        0 SACK based rescue retransmit
    0 client connection attempted to negotiate ECN
        0 client connection successfully negotiated ECN
        0 time graceful fallback to Non-ECN connection
        0 time lost ECN negotiating SYN, followed by retransmission
        0 server connection attempted to negotiate ECN
        0 server connection successfully negotiated ECN
        0 time lost ECN negotiating SYN-ACK, followed by retransmission
        0 time received congestion experienced (CE) notification
        0 time CWR was sent in response to ECE
        0 time sent ECE notification
        0 connection received CE atleast once
        0 connection received ECE atleast once
        0 connection using ECN have seen packet loss but no CE
        0 connection using ECN have seen packet loss and CE
        0 connection using ECN received CE but no packet loss
        0 connection fell back to non-ECN due to SYN-loss
        0 connection fell back to non-ECN due to reordering
        0 connection fell back to non-ECN due to excessive CE-markings
        0 connection fell back caused by connection drop due to RST
        0 connection fell back due to drop after multiple retransmits
        0 connection fell back due to RST after SYN
    0 time packet reordering was detected on a connection
        0 time transmitted packets were reordered
        0 time fast recovery was delayed to handle reordering
        0 time retransmission was avoided by delaying recovery
        0 retransmission not needed
    0 retransmission due to tail loss
    0 time DSACK option was sent
        0 time DSACK option was received
        0 time DSACK was disabled on a connection
        0 time recovered from bad retransmission using DSACK
        0 time ignored DSACK due to ack loss
        0 time ignored old DSACK options
    0 time PMTU Blackhole detection, size reverted
    0 connection were dropped after long sleep
    0 connection had stretch ack algorithm disabled
    0 time a TFO-cookie has been announced
    0 SYN with data and a valid TFO-cookie have been received
    0 SYN with TFO-cookie-request received
    0 time an invalid TFO-cookie has been received
    0 time we requested a TFO-cookie
        0 time the peer announced a TFO-cookie
    0 time we combined SYN with data and a TFO-cookie
        0 time our SYN with data has been acknowledged
    0 time a connection-attempt with TFO fell back to regular TCP
    0 time a TFO-connection blackhole'd
    0 time a TFO-cookie we sent was wrong
    0 time did not received a TFO-cookie we asked for
    0 time TFO got disabled due to heuristicsn
    0 time TFO got blackholed in the sending direction
    0 time maximum segment size was changed to default
    0 time maximum segment size was changed to medium
    0 time maximum segment size was changed to low
    0 timer drift less or equal to 1 ms
    0 timer drift less or equal to 10 ms
    0 timer drift less or equal to 20 ms
    0 timer drift less or equal to 50 ms
    0 timer drift less or equal to 100 ms
    0 timer drift less or equal to 200 ms
    0 timer drift less or equal to 500 ms
    0 timer drift less or equal to 1000 ms
    0 timer drift greater than to 1000 ms

All zeroes.  Is that good or bad?? 😳