Procurve Manager Not connecting switches in map

[MWjag]

I have a map built with about 40 switches. The network map leaves about 10 of the switches completely orphaned. I've done rediscovery of all the switches and still nothing. The SNMP strings are ok.
They are a mixture of 2500, 2600, 2800, 8000 series. The orphaned ones include a 2510, 2810, 2626, 2520, 2512.
This used to give me a good map, but after I've added a few new switches and changed some topology I now get this unusable mess.

Thanks in advance...

[Helper · Accepted solution]

Him

Can you check if LLDP is enable ?

bye,

[Jeroen_D]

rightclick on your core switch (or your seed device) and choose re-discover device and wait a bit?

[MWjag]

Can't say for sure, but enabling LLDP may have fixed this.
I ran it on all my switches, rediscovered most of them (why can't you rediscover whole groups on PCM??). The links still were not showing up after 30 minutes of waiting.
Rebooted for the heck of it and, go figure, they now show up.

[Helper]

It's a good news for you.

Bye.