I am seeing an increasing number of inbound errors on one of my systems.
There are no errors indicated on the cisco switch the system is connected
to. I get about 250 errors a day. There are no errors indicated on any
other other lines from the 'netstat -ib' command, the output of which is
below:
Name Mtu Network Address Ipkts Ierrs Ibytes
Opkts Oerrs Obytes Coll
sis0 1500 <Link#1> 00:0a:e6:xx:xx:xx 1050392 1083 276417216
547475 0 124967248 5784
'netstat -ss' gives:
[kosh:root /]$netstat -ss
tcp:
1369978 packets sent
1110237 data packets (259598386 bytes)
4489 data packets (4558958 bytes) retransmitted
189167 ack-only packets (64881 delayed)
50239 window update packets
15961 control packets
1373018 packets received
983065 acks (for 259466635 bytes)
25411 duplicate acks
971899 packets (363304302 bytes) received in-sequence
903 completely duplicate packets (339224 bytes)
7 packets with some dup. data (3355 bytes duped)
14645 out-of-order packets (12898728 bytes)
1795 window update packets
194 packets received after close
327 discarded for bad checksums
5379 connection requests
6597 connection accepts
38 bad connection attempts
11787 connections established (including accepts)
12002 connections closed (including 780 drops)
1906 connections updated cached RTT on close
1906 connections updated cached RTT variance on close
394 connections updated cached ssthresh on close
176 embryonic connections dropped
976748 segments updated rtt (of 852139 attempts)
887 retransmit timeouts
10 connections dropped by rexmit timeout
365 keepalive timeouts
361 keepalive probes sent
4 connections dropped by keepalive
102144 correct ACK header predictions
332038 correct data packet header predictions
6665 syncache entries added
117 retransmitted
97 dupsyn
6597 completed
58 reset
9 stale
1 unreach
udp:
62007 datagrams received
111 with bad checksum
129 dropped due to no socket
61767 delivered
64066 datagrams output
ip:
1499389 total packets received
32 bad header checksums
14 with incorrect version number
1441915 packets for this host
196 packets for unknown/unsupported protocol
1 packet not forwardable
1442208 packets sent from this host
115 output packets dropped due to no bufs, etc.
icmp:
129 calls to icmp_error
Output histogram:
echo reply: 6890
destination unreachable: 129
Input histogram:
destination unreachable: 195
echo: 6890
time exceeded: 1
6890 message responses generated
ICMP address mask responses are disabled
igmp:
Interface is onboard:
sis0: <SiS 900 10/100BaseTX> port 0xc400-0xc4ff mem 0xcfffc000-0xcfffcfff
irq 11 at device 3.0 on pci0
I have several other systems with similar configurations that have never
shown any errors like this. The system is colocated, so I don't have easy
access to swap cables, switch ports etc. Any idea what could be causing
this?
Thanks,
Alvin
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