Random network choppyness

Hi,

At work I have a 1GHz Pentium 3, with 384M of memory running SuSE 8.2 with
the SuSE 2.4.20 kernel. This system is running the following services :-

Mailserver (exim)
MySQL
Apache (mainly running a couple of low use php-MySQL databases)
DNS (for our subdomain of the university network)
DHCP (for up to about 400 devices, but with a long lease time).
SSH
IMAP

However when I'm connected to this machine via SSH, I experience frequent
but seemingly random lagyness in this connection, i.e. there will be a
delay of several seconds between typing something and the output appearing.
I don't see the same lag when sitting at the machine's console which would
tend to sugest it is not a machine load issue, I also only see it with this
machine, which tends to me to sugest something local to this machine,
rather than a network related problem.

Does anyone know what might be going on here or how I can fix it ?

Thanks.

Phill.

Phill Harvey-Smith <(E-Mail Removed)> wrote:
> Hi,

> At work I have a 1GHz Pentium 3, with 384M of memory running SuSE 8.2 with
> the SuSE 2.4.20 kernel. This system is running the following services :-

[..]

> However when I'm connected to this machine via SSH, I experience frequent
> but seemingly random lagyness in this connection, i.e. there will be a
> delay of several seconds between typing something and the output appearing.
> I don't see the same lag when sitting at the machine's console which would
> tend to sugest it is not a machine load issue, I also only see it with this
> machine, which tends to me to sugest something local to this machine,
> rather than a network related problem.

Not for sure, perhaps it's just the NIC or/and cable from this
box. Check the output of '/sbin/ifconfig' for errors at first,
show us the output if you are unsure.
Anything suspicious in 'dmesg'?

--
Michael Heiming

Remove +SIGNS and www. if you expect an answer, sorry for
inconvenience, but I get tons of SPAM

Michael Heiming <(E-Mail Removed)> wrote in
news:(E-Mail Removed):

> Phill Harvey-Smith <(E-Mail Removed)> wrote:
>> Hi,
>
>> At work I have a 1GHz Pentium 3, with 384M of memory running SuSE 8.2
>> with the SuSE 2.4.20 kernel. This system is running the following
>> services :-
>
> [..]
>
>> However when I'm connected to this machine via SSH, I experience
>> frequent but seemingly random lagyness in this connection, i.e. there
>> will be a delay of several seconds between typing something and the
>> output appearing. I don't see the same lag when sitting at the
>> machine's console which would tend to sugest it is not a machine load
>> issue, I also only see it with this machine, which tends to me to
>> sugest something local to this machine, rather than a network related
>> problem.
>
> Not for sure, perhaps it's just the NIC or/and cable from this
> box. Check the output of '/sbin/ifconfig' for errors at first,
> show us the output if you are unsure.
> Anything suspicious in 'dmesg'?

Should not be a NIC/Cable problem, as the network card was replaced at
the same time as the departmental network was profesioanlly re-cabled
about 6 months ago. (To cat 6 standards )

No errors on ifconfig :-


eth0 Link encap:Ethernet HWaddr 00:01:02:A8:85:F4
inet addr:137.205.155.2 Bcast:137.205.155.255
Mask:255.255.255.0 inet6 addr: fe80::201:2ff:fea8:85f4/64
Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:7058622 errors:0 dropped:0 overruns:1 frame:0
TX packets:3770218 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:3021060008 (2881.1 Mb) TX bytes:1129075840 (1076.7
Mb) Interrupt:11 Base address:0xdc00



dmesg included below :-

The unrecognised scancodes are probably being generated by the KVM that
this machine is connected to (Belkin 4 port), as we have problems with our
netware servers which are also connected to these KVMs losing their
keboards

00 (reserved)
BIOS-e820: 00000000fff00000 - 0000000100000000 (reserved)
Scanning bios EBDA for MXT signature
0MB HIGHMEM available.
318MB LOWMEM available.
ACPI: have wakeup address 0xc0001000
On node 0 totalpages: 81600
zone(0): 4096 pages.
zone(1): 77504 pages.
zone(2): 0 pages.
ACPI: RSDP (v000 AMI ) @ 0x000ff980
ACPI: RSDT (v001 D815EA D815EPFV 08193.02328) @ 0x13ef0000
ACPI: FADT (v001 D815EA EA81510A 08193.02328) @ 0x13ef1000
ACPI: MADT (v001 D815EA EA81510A 08193.02328) @ 0x13ee30e4
ACPI: DSDT (v001 D815E2 EA81520A 00000.00035) @ 0x00000000
ACPI: BIOS passes blacklist
Building zonelist for node : 0
Kernel command line: root=/dev/hda2
Initializing CPU#0
Detected 996.329 MHz processor.
Console: colour VGA+ 80x25
Calibrating delay loop... 1985.74 BogoMIPS
Memory: 318896k/326400k available (1572k kernel code, 7116k reserved, 574k
data, 160k init, 0k highmem)
Dentry cache hash table entries: 65536 (order: 7, 524288 bytes)
Inode cache hash table entries: 32768 (order: 6, 262144 bytes)
Mount cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer-cache hash table entries: 16384 (order: 4, 65536 bytes)
Page-cache hash table entries: 131072 (order: 7, 524288 bytes)
CPU: L1 I cache: 16K, L1 D cache: 16K
CPU: L2 cache: 256K
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
CPU: After generic, caps: 0383fbff 00000000 00000000 00000000
CPU: Common caps: 0383fbff 00000000 00000000 00000000
CPU: Intel Pentium III (Coppermine) stepping 0a
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
POSIX conformance testing by UNIFIX
mtrr: v1.40 (20010327) Richard Gooch ((E-Mail Removed))
mtrr: detected mtrr type: Intel
ACPI: Subsystem revision 20030228
PCI: PCI BIOS revision 2.10 entry at 0xfda95, last bus=1
PCI: Using configuration type 1
ACPI: Interpreter enabled
ACPI: Using PIC for interrupt routing
ACPI: System [ACPI] (supports S0 S1 S4 S5)
ACPI: PCI Root Bridge [PCI0] (00:00)
PCI: Probing PCI hardware (bus 00)
Transparent bridge - Intel Corp. 82801BA/CA/DB PCI Bridge
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PCI1._PRT]
ACPI: Power Resource [FDDP] (off)
ACPI: Power Resource [URP1] (off)
ACPI: Power Resource [URP2] (off)
ACPI: Power Resource [LPTP] (off)
ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 9 10 *11 12)
ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 9 *10 11 12)
ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 9 10 11 12, disabled)
ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 9 10 *11 12)
ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 9 10 11 12, disabled)
ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 9 10 11 12, disabled)
ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 9 10 *11 12)
ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 *9 10 11 12)
PCI: Probing PCI hardware
ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 5
ACPI: PCI Interrupt Link [LNKE] enabled at IRQ 10
ACPI: PCI Interrupt Link [LNKF] enabled at IRQ 9
PCI: Using ACPI for IRQ routing
PCI: if you experience problems, try using option 'pci=noacpi' or even
'acpi=off'
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
apm: BIOS version 1.2 Flags 0x03 (Driver version 1.16)
apm: overridden by ACPI.
mxt_scan_bios: enter
Starting kswapd
bigpage subsystem: allocated 0 bigpages (=0MB).
kinoded started
VFS: Disk quotas vdquot_6.5.1
aio_setup: num_physpages = 20400
aio_setup: sizeof(struct page) = 48
pty: 256 Unix98 ptys configured
Serial driver version 5.05c (2001-07-08) with HUB-6 MANY_PORTS MULTIPORT
SHARE_IRQ SERIAL_PCI enabled
ttyS00 at 0x03f8 (irq = 4) is a 16550A
ttyS01 at 0x02f8 (irq = 3) is a 16550A
Real Time Clock Driver v1.10e
Floppy drive(s): fd0 is 1.44M
keyboard: Timeout - AT keyboard not present?(ed)
FDC 0 is a post-1991 82077
RAMDISK driver initialized: 16 RAM disks of 64000K size 1024 blocksize
loop: loaded (max 16 devices)
Uniform Multi-Platform E-IDE driver Revision: 7.00beta-2.4
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
ICH2: IDE controller at PCI slot 00:1f.1
ICH2: chipset revision 17
ICH2: not 100% native mode: will probe irqs later
ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hdaMA, hdbio
ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdcMA, hddio
hda: Maxtor 6Y080L0, ATA DISK drive
blk: queue c03ac500, I/O limit 4095Mb (mask 0xffffffff)
hdc: CRD-8480B, ATAPI CD/DVD-ROM drive
hdc: Disabling (U)DMA for CRD-8480B
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: attached ide-disk driver.
hda: host protected area => 1
hda: 160086528 sectors (81964 MB) w/2048KiB Cache, CHS=9964/255/63, UDMA
(33)
ide-floppy driver 0.99.newide
Partition check:
hda: hda1 hda2 hda3
ide-floppy driver 0.99.newide
SCSI subsystem driver Revision: 1.00
kmod: failed to exec /sbin/modprobe -s -k scsi_hostadapter, errno = 2
md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
md: Autodetecting RAID arrays.
md: autorun ...
md: ... autorun DONE.
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
IP: routing cache hash table of 2048 buckets, 16Kbytes
TCP: Hash tables configured (established 32768 bind 65536)
Linux IP multicast router 0.06 plus PIM-SM
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
RAMDISK: Compressed image found at block 0
Freeing initrd memory: 397k freed
VFS: Mounted root (ext2 filesystem).
ahc_pci:1:11:0: Host Adapter Bios disabled. Using default SCSI device
parameters
scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.29
<Adaptec 2902/04/10/15/20/30C SCSI adapter>
aic7850: Single Channel A, SCSI Id=7, 3/253 SCBs

blk: queue c1447814, I/O limit 4095Mb (mask 0xffffffff)
(scsi0:A:0): 10.000MB/s transfers (10.000MHz, offset 15)
Vendor: SONY Model: SDT-9000 Rev: 0400
Type: Sequential-Access ANSI SCSI revision: 02
blk: queue d3cbce14, I/O limit 4095Mb (mask 0xffffffff)
VFS: Mounted root (ext2 filesystem) readonly.
Trying to move old root to /initrd ... failed
Unmounting old root
Trying to free ramdisk memory ... okay
Freeing unused kernel memory: 160k freed
md: Autodetecting RAID arrays.
md: autorun ...
md: ... autorun DONE.
LVM version 1.0.5+(mp-v6a)(22/07/2002) module loaded
Adding Swap: 524624k swap-space (priority 42)
3c59x: Donald Becker and others. www.scyld.com/network/vortex.html
See Documentation/networking/vortex.txt
01:0a.0: 3Com PCI 3c905C Tornado at 0xdc00. Vers LK1.1.16
00:01:02:a8:85:f4, IRQ 11
product code 4552 rev 00.13 date 07-16-00
Internal config register is 1800000, transceivers 0xa.
8K byte-wide RAM 5:3 Rx:Tx split, autoselect/Autonegotiate interface.
MII transceiver found at address 24, status 782d.
Enabling bus-master transmits and whole-frame receives.
01:0a.0: scatter/gather enabled. h/w checksums enabled
IPv6 v0.8 for NET4.0
IPv6 over IPv4 tunneling driver
raw1394: /dev/raw1394 device initialized
usb.c: registered new driver usbdevfs
usb.c: registered new driver hub
usb-uhci.c: $Revision: 1.275 $ time 18:38:47 Dec 17 2003
usb-uhci.c: High bandwidth mode enabled
PCI: Setting latency timer of device 00:1f.2 to 64
usb-uhci.c: USB UHCI at I/O 0xef40, IRQ 11
usb-uhci.c: Detected 2 ports
usb.c: new USB bus registered, assigned bus number 1
hub.c: USB hub found
hub.c: 2 ports detected
PCI: Setting latency timer of device 00:1f.4 to 64
usb-uhci.c: USB UHCI at I/O 0xef80, IRQ 9
usb-uhci.c: Detected 2 ports
usb.c: new USB bus registered, assigned bus number 2
hub.c: USB hub found
hub.c: 2 ports detected
usb-uhci.c: v1.275:USB Universal Host Controller Interface driver
uhci.c: USB Universal Host Controller Interface driver v1.1
hub.c: new USB device 00:1f.4-2, assigned address 2
hub.c: USB hub found
hub.c: 4 ports detected
st: Version 20020805, bufsize 32768, wrt 30720, max init. bufs 4, s/g segs
16
Attached scsi tape st0 at scsi0, channel 0, id 0, lun 0
eth0: no IPv6 routers present
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (6b) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (68) - ignored
keyboard: unrecognized scancode (68) - ignored
keyboard: unrecognized scancode (76) - ignored
keyboard: unrecognized scancode (68) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (69) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (70) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (62) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (6c) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (68) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (68) - ignored
keyboard: unrecognized scancode (68) - ignored
keyboard: unrecognized scancode (68) - ignored
keyboard: unrecognized scancode (65) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (71) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (6b) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (68) - ignored
keyboard: unrecognized scancode (68) - ignored
keyboard: unrecognized scancode (68) - ignored
keyboard: unrecognized scancode (68) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: Timeout - AT keyboard not present?(ed)
parport0: PC-style at 0x378 [PCSPP,TRISTATE,EPP]
lp0: using parport0 (polling).
usb.c: registered new driver serial
usbserial.c: USB Serial support registered for Generic
usbserial.c: USB Serial Driver core v1.4
isapnp: Scanning for PnP cards...
isapnp: No Plug & Play device found
Installing knfsd (copyright (C) 1996 (E-Mail Removed)).
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (68) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (76) - ignored
keyboard: unrecognized scancode (63) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (65) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (72) - ignored
keyboard: unrecognized scancode (6e) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (71) - ignored
keyboard: unrecognized scancode (64) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (5f) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (6e) - ignored
keyboard: unrecognized scancode (6a) - ignored
keyboard: unrecognized scancode (6c) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (75) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (68) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (66) - ignored
keyboard: unrecognized scancode (66) - ignored
eth0: Setting promiscuous mode.
device eth0 entered promiscuous mode
device eth0 left promiscuous mode
eth0: Setting promiscuous mode.
device eth0 entered promiscuous mode
device eth0 left promiscuous mode
eth0: Setting promiscuous mode.
device eth0 entered promiscuous mode
device eth0 left promiscuous mode
st0: Block limits 1 - 16777215 bytes.
st0: Error with sense data: Current st09:00: sns = 70 2
ASC=3a ASCQ= 0
Raw sense data:0x70 0x00 0x02 0x00 0x00 0x00 0x00 0x12 0x00 0x00 0x00 0x00
0x3a 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x08 0x00 0x00 0x00
eth0: Setting promiscuous mode.
device eth0 entered promiscuous mode
device eth0 left promiscuous mode


Thanks.

Phill.

Phill Harvey-Smith <(E-Mail Removed)> wrote:
> Michael Heiming <(E-Mail Removed)> wrote in
> news:(E-Mail Removed):

> > Phill Harvey-Smith <(E-Mail Removed)> wrote:
> >> Hi,
> >
> >> At work I have a 1GHz Pentium 3, with 384M of memory running SuSE 8.2
> >> with the SuSE 2.4.20 kernel. This system is running the following
> >> services :-
> >
> > [..]
> >
> >> However when I'm connected to this machine via SSH, I experience
> >> frequent but seemingly random lagyness in this connection, i.e. there
> >> will be a delay of several seconds between typing something and the
> >> output appearing. I don't see the same lag when sitting at the

[..]


> eth0 Link encap:Ethernet HWaddr 00:01:02:A8:85:F4
[..]
> RX packets:7058622 errors:0 dropped:0 overruns:1 frame:0
> TX packets:3770218 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:100

Looks good!

> dmesg included below :-

> The unrecognised scancodes are probably being generated by the KVM that
> this machine is connected to (Belkin 4 port), as we have problems with our
> netware servers which are also connected to these KVMs losing their
> keboards

[..]

> ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 9 10 *11 12)
> ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 9 *10 11 12)
> ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 9 10 11 12, disabled)
> ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 9 10 *11 12)
> ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 9 10 11 12, disabled)
> ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 9 10 11 12, disabled)
> ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 9 10 *11 12)
> ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 *9 10 11 12)
[..]
> keyboard: unrecognized scancode (66) - ignored
> keyboard: unrecognized scancode (6b) - ignored
> keyboard: unrecognized scancode (66) - ignored
> keyboard: unrecognized scancode (66) - ignored
[..]

There seem to be some problems, I'd run a few days without your
KVM switch and see if this improves things.

What kind of driver/NIC are your running?

BTW
I'd use server with a complete serial BIOS redirection, no KVM
switch needed, just use a terminal server.

Good luck

--
Michael Heiming

Remove +SIGNS and www. if you expect an answer, sorry for
inconvenience, but I get tons of SPAM