Ethernet controller differences between 4D/340 and 4D/25

[Steve Dempsey]

Let me try asking a specific question since I'm not getting anywhere
with this problem.  What causes "retransmit timeouts" on a 340 using the IO2
board as reported by 'netstat -p tcp'?:

tcp:
        2241271 packets sent
                1942725 data packets (1701239978 bytes)
                11970 data packets (14359783 bytes) retransmitted
                239995 ack-only packets (227522 delayed)
                278 URG only packets
                943 window probe packets
                41099 window update packets
                4261 control packets
        2017922 packets received
                1393024 acks (for 1701333400 bytes)
                20860 duplicate acks
                0 acks for unsent data
                887096 packets (221013020 bytes) received in-sequence
                1592 completely duplicate packets (85826 bytes)
                248 packets with some dup. data (993 bytes duped)
                7435 out-of-order packets (5046742 bytes)
                54 packets (5 bytes) of data after window
                5 window probes
                40083 window update packets
                27 packets received after close
                0 discarded for bad checksums
                0 discarded for bad header offset fields
                0 discarded because packet too short
        1553 connection requests
        1532 connection accepts
        3024 connections established (including accepts)
        3477 connections closed (including 26 drops)
        174 embryonic connections dropped
        1378640 segments updated rtt (of 1389598 attempts)
>>	7373 retransmit timeouts
>>		12 connections dropped by rexmit timeout
        354 persist timeouts
        334 keepalive timeouts
                30 keepalive probes sent
                0 connections dropped by keepalive
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Steve Dempsey					voice:	  (619) 534-0208
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