I am mopping up the aftermath of a mess- we had a week-plus long phone system outage, triggered by a switch going flaky- part of the troubleshooting had involved removing many cables from several switches. So the actual mess I have is trying to figure out what I could have done to more quickly identify ports and cables. Our switching infrastructure runs on HP Procurve managed switches. We have a horrible tangle of cables at a remote facility and good local help, limited by our company's contract with the local provider. I am trying to understand how LLDP and CDP work on these switches so I understand the information I get back from them. I thought this data updated in real time, but two things became evident in the past day:
When I asked onsite tech support to trace cables, the ports at both ends were wrong
When I looked in the settings, there was a reference made to a refresh interval of 10 days (This was in LLDP, not DHCP on the switch!)
So, when I run a simple query like:

show info lldp remote-system

Select allOpen in new window

is it showing me something that is 10 days old? Or is the refresh related to something else?
Is there a way to trigger a refresh "now"?
If I active LLDP on a switch that previously had it disabled, how long does it take before it populates its LLDP remote systems information, and how long before it shows up as a remote system on another switch?
-or-
should I be using a different method to identify which devices are on which ports?

Our switches are:
HP Procurve:
1700
V1910
2530
2600
2910al

Thanks for the advice!