[cisco-voip] DHCP Problems | CME / Windows

[Kim, Hyoun S]

After implementing the last Cisco VoIP solution for our offices, I've
stumbled across a problem with machines (all Windows) that occasionally
drop their network connection just briefly every couple of hours.  While
this normally wouldn't be a problem, it is for us because we redirect
several of the default Windows folders to a Windows server.  When the
connection drops, Windows loses these folders and you have to log
off/log on to get them back.

 

Looking into the Event Properties of various windows machines, it
intermittently gets a DHCPNACK message from another DHCP server.
Unfortunately, that DHCP server is the DHCP pool I set up on the CME.

 

One of the Ethernet ports on the CME is configured for the data VLAN.
This is connected to our switch with only the data VLAN being shown when
I perform a show spanning-tree on that interface.

The other Ethernet port is strictly configured for the voice VLAN and
displays only the voice VLAN in a show spanning-tree on that interface.

 

Each PC port has both the data VLAN & voice vlan defined in the
configuration w/ the phone containing "switchport voice vlan 100".

 

Do you guys have any suggestions on why the Windows machines are trying
to pull an IP from the Cisco DHCP server I set up for the phones?

 

Thanks in advance.

 

 

 

________________________________

Hyoun Kim * Network Administrator I - East Division

640 Broadmor Blvd * Suite 80 * Murfreesboro, TN 37129

' 615.217.6245 * ' 859.312.6941 * 7 615.217.6255 * * 
Hyoun.Kim at chartercom.com <mailto:Hyoun.Kim at chartercom.com> 

 


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