[nmglug] netstat tcp

a a at kaluta.us
Fri Jan 14 06:38:29 PST 2011


The retransmit packet loss is under 10-15%
I would not worry about it.
Best 
a


On Fri, 2011-01-14 at 06:30 -0700, a wrote:
> For the network guys;
> 
> Is the tcp retransmit segments number shown below,that being 394,
> a point of concern?
> 
> Anthony
> 
> 
> As part of solving a checksum problem, 
> results of some suggested Diagnostics 
> memtest80+ long test passed (0-9)
> Segate Disc diagnostics passed
> 
> 
> 
> 
> 
> a at desktop:~$ netstat -s -p tcp
> Ip:
>     28847 total packets received
>     0 forwarded
>     0 incoming packets discarded
>     28845 incoming packets delivered
>     28700 requests sent out
>     9 dropped because of missing route
> Icmp:
>     569 ICMP messages received
>     0 input ICMP message failed.
>     ICMP input histogram:
>         echo replies: 569
>     710 ICMP messages sent
>     0 ICMP messages failed
>     ICMP output histogram:
>         destination unreachable: 8
>         echo request: 702
> IcmpMsg:
>         InType0: 569
>         OutType3: 8
>         OutType8: 702
> Tcp:
>     978 active connections openings
>     38 passive connection openings
>     43 failed connection attempts
>     27 connection resets received
>     3 connections established
>     22798 segments received
>     22126 segments send out
>     394 segments retransmited
>     0 bad segments received.
>     469 resets sent
> Udp:
>     5474 packets received
>     8 packets to unknown port received.
>     0 packet receive errors
>     5515 packets sent
> UdpLite:
> TcpExt:
>     353 TCP sockets finished time wait in fast timer
>     646 delayed acks sent
>     Quick ack mode was activated 275 times
>     12979 packet headers predicted
>     1653 acknowledgments not containing data payload received
>     225 predicted acknowledgments
>     37 congestion windows recovered without slow start after partial
ack
>     3 timeouts after SACK recovery
>     1 retransmits in slow start
>     147 other TCP timeouts
>     272 DSACKs sent for old packets
>     49 DSACKs received
>     45 connections reset due to unexpected data
>     24 connections reset due to early user close
>     38 connections aborted due to timeout
>     TCPDSACKIgnoredOld: 27
>     TCPDSACKIgnoredNoUndo: 16
>     TCPSackShiftFallback: 3
> IpExt:
>     InNoRoutes: 2
>     InMcastPkts: 317
>     OutMcastPkts: 282
>     InBcastPkts: 435
>     OutBcastPkts: 435
>     InOctets: 27334560
>     OutOctets: 3045490
>     InMcastOctets: 26537
>     OutMcastOctets: 25433
>     InBcastOctets: 59160
>     OutBcastOctets: 59160
> a at desktop:~$ 



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