Re: how can we know if esx with static ip is listen to DHCP server on nics?

I wish you could elaborate the question but with what i have from your post, i suggest you to try the following.

1. from the command prompt of the vcenter server ping the DHCP server with both fqdn and ip address of the DHCP server
   ex: ping DHCP_server
   ping xxx.xx.xx.xx
   (where xxx.xx.xx.xx is the ip address of the DHCP server)
2. Now try the opposite from the DHCP server.
   ex: ping vCenter_server
   ping vvv.vv.vv.vv
   (where vvv.vv.vv.vv is the ip of the vcenter)
   BUT
   instead of the above 2 steps you can try
   
   1. nslookup DHCP_server
   2. nslookup xxx.xx.xx.xx
      (where xxx.xx.xx.xx is the ip address of the DHCP server)
      
      from the vCenter and
      
      1. nslookup vCenter_server
      2. nslookup vvv.vv.vv.vv
         (where vvv.vv.vv.vv is the ip of the vcenter)
         and if they if both of them list the proper information of the server then they are listening to each other properly.

If your talking about Windows port numbers then it's 67 for the DHCP client (vcenter server) and 68 for the DHCP server
So if you want to know whether they are communicating through these ports then from the vcenter you can try
telnet DHCP_server 67
and then you can also try
telnet DHCP_server 68

On the other hand if you are using a vcenter appliance instead of the windows version of vcenter then please read
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2032936

-----------------------------------------------------
If you find the answer useful then plz award points