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Cisco Bug: CSCun80424 - ATA190 stuck in DHCP discover-offer loop if access/voice vlan are same

Last Modified

Jan 29, 2019

Products (1)

  • Cisco IP Phone 7800 Series

Known Affected Releases

1.1(0.1)

Description (partial)

Symptom:
ATA190 will not send a DHCP Request to DHCP server and be stuck in a loop, sending a DHCP Discover and receiving a DHCP Offer, from DHCP server. This will prevent the ATA from obtaining an IP address and the TFTP server IP address from DHCP server and ultimately from registering to Cisco Unified Communications Manager

Conditions:
ATA190 running firmware 1.1.0(004) or earlier
On switchport, both the access and voice VLANs are defined with the same VLAN ID

Example:
interface FastEthernet0/13
 switchport access vlan 211
 switchport voice vlan 211
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