Cisco 7800 Series Administration Manual page 173

Cisco IP Phone Troubleshooting
Message
IPv6 DHCP Timeout
IPv4 DNS Timeout
IPv6 DNS Timeout
DNS unknown IPv4 Host
DNS unknown IPv6 Host
Description
IPv6 DHCP server did not respond.
IPv4 DNS server did not respond.
IPv6 DNS server did not respond.
IPv4 DNS could not resolve the name of
the TFTP server or Cisco Unified
Communications Manager.
IPv6 DNS could not resolve the name of
the TFTP server or Cisco Unified
Communications Manager.
Cisco IP Phone 7800 Series Administration Guide for Cisco Unified Communications Manager
Status Messages Fields
Possible Explanation and Action
Network is busy - The errors should resolve
themselves when the network load reduces.
No network connectivity between the IPv6
DHCP server and the phone: Verify the
network connections.
IPv6 DHCP server is down: Check
configuration of IPv6 DHCP server.
Errors persist: Consider assigning a static
IPv6 address.
Network is busy: The errors should resolve
themselves when the network load reduces.
No network connectivity between the IPv4
DNS server and the phone: Verify the
network connections.
IPv4 DNS server is down: Check
configuration of the IPv4 DNS server.
Network is busy: The errors should resolve
themselves when the network load reduces.
No network connectivity between the IPv6
DNS server and the phone: Verify the
network connections.
IPv6 DNS server is down: Check
configuration of the IPv6 DNS server.
Verify that the host names of the TFTP
server or Cisco Unified Communications
Manager are configured properly in IPv4
DNS.
Consider using IPv4 addresses rather than
host names
Verify that the host names of the TFTP
server or Cisco Unified Communications
Manager are configured properly in IPv6
DNS.
Consider using IPv6 addresses rather than
host names
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