DHCP Binding

Unanswered Question

Every morning  some of my IP Phones are stuck on Configuring IP.  I run the command Clear IP DHCP Binding * and the phones come back up.  I have also created a new voice VLAN just because we were short on IPs.  But now that I have created a new voice vlan I am still having to run Clear IP DHCP Binding * on the router.


Current IOS: Cisco IOS Software, 2800 Software (C2800NM-ADVIPSERVICESK9-M), Version 12.4(20)T1, RELEASE SOFTWARE (fc3)


DHCP Config:

no ip dhcp use vrf connected
ip dhcp excluded-address 10.200.1.254
ip dhcp excluded-address 10.200.1.1 10.200.1.30
!
ip dhcp pool Voice-VLAN
   network 10.200.1.0 255.255.255.0
   default-router 10.200.1.254
   option 150 ip 10.200.1.5
   lease 3


My other voice vlan DHCP is configured on a Windows Server.  Its on network 10.201.1.0 255.255.255.0



Any ideas of what to do to resolve issue?


Thanks,


Jaime

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Hi Andrew,


We have currently 180 phones in voice vlan 200 and 40 in (new) voice vlan 201.


Switch ports are configured as follows.  We are using the 10/100 ports on the IP Phones for PC connectivity.  Do you think that is causing an issue?  From what I can tell PCs are grabbing ip addresses for data vlan 20 (Windows DHCP Server).


switchport access vlan 20
switchport voice vlan 200
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape  10  0  0  0
priority-queue out
mls qos trust device cisco-phone
mls qos trust cos
auto qos voip cisco-phone
no mdix auto
spanning-tree portfast


and


switchport access vlan 20
  switchport voice vlan 201
  srr-queue bandwidth share 10 10 60 20
  srr-queue bandwidth shape  10  0  0  0
  priority-queue out
mls qos trust device cisco-phone
  mls qos trust cos
auto qos voip cisco-phone
  no mdix auto
spanning-tree portfast


Thanks,


Jaime

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