"Excessive CRC/Alignment Errors" on HP ProCurve 2810-48G
We recently installed a ProCurve 2810-48G switch - it's pretty much on default settings, here's the config:
; J9022A Configuration Editor; Created on release #N.10.02
hostname "ProCurve Switch 2810-48G"
snmp-server community "public" Unrestricted
vlan 1
name "DEFAULT_VLAN"
untagged 1-48
ip address dhcp-bootp
exit
We're using 47 of the 49 ports at a mixture of 100Mb and 1Gb speeds. "Log Network Problems" is set to medium sensitivity.
The switch is showing a number of errors in the alert log. Six ports (always the same ones) show "Excessive CRC / Alignment errors" intermittently, including, but not limited to, times when the PC on that port was booted up. The ports with errors are all connected to PCs with gigabit NICs, of a couple of different types, running XP Pro.
Also we have two ports showing "Excessive Broadcasts" - one of these is a server that was rebooted at the time of the event being logged, the other is a PC running Vista 64-bit.
Cabling and patch leads are all CAT5e, although it's not been certified by means of a Fluke or other device - only by a continuity tester (i.e. we know all pairs are correctly wired for each cable, but that is all).
Is this anything to worry about? Does it even need addressing, as everything appears to work correctly?
Thanks in advance for any help.
; J9022A Configuration Editor; Created on release #N.10.02
hostname "ProCurve Switch 2810-48G"
snmp-server community "public" Unrestricted
vlan 1
name "DEFAULT_VLAN"
untagged 1-48
ip address dhcp-bootp
exit
We're using 47 of the 49 ports at a mixture of 100Mb and 1Gb speeds. "Log Network Problems" is set to medium sensitivity.
The switch is showing a number of errors in the alert log. Six ports (always the same ones) show "Excessive CRC / Alignment errors" intermittently, including, but not limited to, times when the PC on that port was booted up. The ports with errors are all connected to PCs with gigabit NICs, of a couple of different types, running XP Pro.
Also we have two ports showing "Excessive Broadcasts" - one of these is a server that was rebooted at the time of the event being logged, the other is a PC running Vista 64-bit.
Cabling and patch leads are all CAT5e, although it's not been certified by means of a Fluke or other device - only by a continuity tester (i.e. we know all pairs are correctly wired for each cable, but that is all).
Is this anything to worry about? Does it even need addressing, as everything appears to work correctly?
Thanks in advance for any help.
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If they're all odd, maybe your switch is bad - perhaps bad ASIC? Moving cables around between odds and evens might rule this out.
ASKER
Turned the fault detection up to high sensitivity and rebooted the switch at the end of the day on the 20th June. Only 3 instances of CRC/alignment errors since, on two ports that hadn't shown errors before.
I also spotted that some of our old patch leads are CAT5, not CAT5E, so I'll be replacing those as a matter of course.
For the moment though, it looks like a simple reboot helped, if not cured the problem. I wouldn't have expected that from a quality switch like this though.
I also spotted that some of our old patch leads are CAT5, not CAT5E, so I'll be replacing those as a matter of course.
For the moment though, it looks like a simple reboot helped, if not cured the problem. I wouldn't have expected that from a quality switch like this though.
Thanks for the update. I'd watch the error counters on those 2 ports, & a couple of those top row ports, see if the errors start increasing again. If they do increase, hopefully you can find a pattern to the behavior.
cheers
cheers
ASKER
The CRC / Alignment errors have pretty much gone after a reboot of the switch - only happened twice in the last month.
Still get the occasional (maybe 15 times this month) "Excessive broadcasts", but all from the same few hosts so pretty sure that's normal for what they're doing (we had an IP phone plugged in for testing, for example).
calvinetter gets the points for his very useful pointers.
Still get the occasional (maybe 15 times this month) "Excessive broadcasts", but all from the same few hosts so pretty sure that's normal for what they're doing (we had an IP phone plugged in for testing, for example).
calvinetter gets the points for his very useful pointers.
ASKER
Cables I will check, perhaps swap some ports around to see if the problem stays with PC or cable.
Driver updates - pretty sure already ok, but will double-check again.
Switchport - well, interestingly enough the ports affected are all odd (top row): 9,13,17, 23,29,31,39,47 - so will swap some round to rule this out.