Server did not respond to LDAP query to port 389 UDP

Hello!

I have several domain controllers Windows 2008 R2.

One of them did not respond to LDAP query to port 389.

No firewalls between client and controllers. 

The same situation if I run portqry from console on this domain controller.

Local firewall is off.

Portqry -n domaincontroller_name -p udp -e 389

...

LDAP query to port 389 failed

Server did not respond to LDAP query

netstat -ano | find ":389"

  TCP    0.0.0.0:389            0.0.0.0:0              LISTENING      612
  TCP    xx.xx.xx.xx:389         xx.xx.xx.xx:10476      ESTABLISHED     612
   ...
  UDP    xx.xx.xx.xx:389         *:*                                    612
  UDP    [fe80::f86a:50f6:2cb9:87ce%10]:389  *:*                                    612

Thank you for any help!