ok problem has been resolved.
Based on Craig's advice I tried SNMP walking the machines that had turned red, and not 1 of them returned properly.
That got me thinking on what may have changed. On Friday we changed the trunk cable between the rack switch & the main switch from cat5e to cat6 but did not remember anything else. Then I remembered that yesterday morning I had to get to JFFNMS via the IP address instead of the DNS alias I had setup. Upon further investigation it showed that whilst the DNS alias was still there, the A-record was not - so I re-added it and thought everything was fine and dandy.
Once I tried the snmpwalk and couldn't get a response I tried restarting the SNMP agent on the WinXP / Win2k3 machine and that solved that problem. On the Win2k servers I needed to remove / re-add the entry in the SNMP "allowed hosts" list under the security tab of the SNMP service agent.
It would appear that the Windows SNMP agent does not like it when the DNS alias points to an A record that doesn't exist and is unable to recover from the situation without manual intervention.
Glenn.
[EMAIL PROTECTED] wrote on 07/08/2006 04:05:04 PM:
> On Mon, Aug 07, 2006 at 12:24:48PM +1000, [EMAIL PROTECTED]
> qld.gov.au wrote:
> > I have a strange issue. Between 1pm and 2pm last Friday the interfaces on
> > my windows boxes started going red.
> Did you change anything?
Yes on Friday we changed the trunk cable from the rack switch to the main switch from Cat5e to Cat6, no changes were made on the machines.
>
> > Index Name Status Description IP Address
> > Peer Address Input Bandwidth
> > 65539 VMware Accelerated AMD PCNet A (Not Found in Host) 50.0.0.71
> > 50.0.0.72 1000000000
> >
> > The Status (Not Found in Host) is a bit alarming.
> SNMPwalk the interface table to see if you can manually see that
> interface.
> eg, something like
>
> snmpwalk -v 1 -c public 127.0.0.1 interfaces.ifTable.ifEntry.ifDescr
>
> You should get a list of interface names, if not, then there is
> something wrong on the remote host. Make sure you change the public
> community and IP address to whatever you use.
>
> - Craig
>
> --
>
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