Problem with Dhcp, cisco, relay. What to do?

Question

Computer networks

Hello,
There is a hierarchical network with dhcp (on a router).

dhcp not working. Dhcp discover is sent and that's it, there is no answer.
There are routes, if you ping from PC3 (which is in the 3rd wealan) to the Dhcp router R4 (60.60.60.1), then everything pings.

If you enable receiving IP via dhcp on PC3, then:
SVI configuration in the distribution switch (which is the one on the left, it is he who is active for 3 weeds)
Dhcp relay is registered (60.60.60.1)

DHCP router configuration

Later I noticed in wireshark that source ip 0.0. 0.0 . It's not normal.
Source ip should be like svi for vlan 3 - is it 192.168.3.2?!
I found the reason, but I don't know what to do.
1

2

This problem is not only in vlan 3, but in the entire network. PC3 took just as an example

Answer 1

Since pings are going through, broadcasts are probably not going through. Tweak the switch settings to find where broadcast traffic is cut. Maybe dhcp snooping is misconfigured somewhere, first turn it off everywhere.

Answer 2

And how are your access, access-distribution, distribution-core interfaces configured, access or trunk?