Dear all, I am experiencing this error message: dhcpd: DHCPDISCOVER from 00:21:5e:95:3a:a9 via eth0: network x.x.x/24: no free leases This is coming from my call manager.  We have two call managers connected to each other for cluster purposes. When I further look on my switch that the CMgr is connected to, I see two dynamic mac addresses on the port to which it is connected.  I released the mac addresses and within seconds, the two mac addresses came back.  I cannot understand why there are two mac addresses associated for this one port. When I log onto the CMgr, I see only one mac address that is not the same as the above.  The difference is in the last 4 digits (3a:a7).  The configuration of the switch has VTP enabled and is the VTP server and connects to only one other switch in our other data center.  The only thing I can imagine is that the switch might be applying two mac addresses to the port due to VTP (can't figure out what else that could be). My first question is has anyone else see this type of issue on their call manager?  or, on the switch to where call manager is connected?  The error messages is generating every two to five seconds and I am concerned that it will start affecting system performance and/or bandwitch issues, and/or dhcp lease issues. I have restarted the callmanager devices already.  I have not reset/cleared the dhcp leases... Any help/advice is greatly appreciated. Version: Active Master Version: 7.1.3.30000-1 ... View more