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DHCP-Server on 2930 after weeks conflicts, after dhcp-server restart all is fine

boospy
Occasional Advisor

DHCP-Server on 2930 after weeks conflicts, after dhcp-server restart all is fine

Hello,

i'am using here an hp2930 with firmwareversion WB.16.05.0003. I've configured dhcp-server for some vlan's and fixed mac's. There are also publicadresses will be assigned from the dhcp-server. In that pool are only 12 Adresses. the Problem is that after some week there are no dhcp-adresses to offer. There was are only one device in the network how I thought that.  When show conflicts, there alle adresses in, like this for example:

IP Address       Detection Method Detection Time                
  ---------------- ---------------- ------------------------------
 192.168.0.208    Gratuitous Arp   Mar 19 2018 13:57:18          
 192.168.0.209    Gratuitous Arp   Jan 29 2018 10:22:44          
 192.168.0.210    Gratuitous Arp   Mar 19 2018 13:57:16          
 192.168.0.211    Gratuitous Arp   Mar 19 2018 13:57:14          
 192.168.0.212    Gratuitous Arp   Mar 19 2018 13:57:20          
 192.168.0.213    Gratuitous Arp   Jan 29 2018 10:22:48          
 192.168.0.214    Gratuitous Arp   Mar 19 2018 13:57:12          
 192.168.0.215    Gratuitous Arp   Jan 29 2018 10:22:42          
 192.168.0.216    Gratuitous Arp   Jan 29 2018 10:22:46          
 192.168.0.217    Gratuitous Arp   Mar 19 2018 13:57:22          
 192.168.0.218    Gratuitous Arp   Jan 29 2018 10:22:51          
 192.168.0.219    Gratuitous Arp   Jan 29 2018 10:22:53          

Here are the configureation of the pool.

dhcp-server pool "corenetdynamic"
   bootfile-name "pxelinux.0"
   default-router "77.235.70.221"
   dns-server "77.235.70.226,77.235.69.99"
   lease 00:00:10
   network192.168.0.192 255.255.255.224
   range192.168.0.208192.168.0.219
   tftp-server server-ip192.168.0.201
   exit

After "dhcp-server disable" and "dhcp-server enable" everything was working normal. This was the scond one of this failure.

Thanks for helping. :)

 

3 REPLIES
parnassus
Honored Contributor

Re: DHCP-Server on 2930 after weeks conflicts, after dhcp-server restart all is fine

Lease Time: only ten minutes? Is this really correct? the command syntax is [no] lease [DD:HH:MM | infinite ] ...so you've set really 10 minutes using the string lease 00:00:10.


@boospywrote: Here are the configureation of the pool.
dhcp-server pool "corenetdynamic"
   bootfile-name "pxelinux.0"
   default-router "77.235.70.221"
   dns-server "77.235.70.226,77.235.69.99"
   lease 00:00:10
   network192.168.0.192 255.255.255.224
   range192.168.0.208192.168.0.219
   tftp-server server-ip192.168.0.201
   exit
boospy
Occasional Advisor

Re: DHCP-Server on 2930 after weeks conflicts, after dhcp-server restart all is fine

Yes this are 10 Minutes, because for some month i had a similar problem with the dhcpserver that the addresses ran out.  That time I've contact the hpe-support, and the lease of on day was to long. Because sometimes there are more devices in this little vlan, so i've changed to 10 minutes, after that the problem was gone.

boospy
Occasional Advisor

Re: DHCP-Server on 2930 after weeks conflicts, after dhcp-server restart all is fine

Ist it possible to clean dhcp-conflicts automaticliy like Ubuntu, Windows or Fortinet?

Thanks :)