Network topology - router 3845 connect to the root switch Catalyst 5500 (CatOS), which is connected to the distribution switches 3508 and access switches 3524.
After a weekend half of 3524 is missing on 3 layer (cant ping), but the switches work properly and can be seen themselves
with cdp.
IP addresses are registered in the 1 vlan and the most strange thing is that MAC address in this vlan are visible at 5500, and are visible in the arp table of the router (after "clear arp" they appear), but switches do not ping.
Initially it was suspected that there is a loop (stp has been disabled), and after I turn it on for the 1 vlan on one of the switches, and restart it, switch appeared, but after some time fell off again. Even I thought it may be a problem with vtp, but when I look at the problem switch vtp status, I did not see any problems.
Config with altered ip addresses is in the attachment, and sorry for bad english.
