Cisco Cisco IOS Software Release 12.4(4)T

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Caveats for Cisco IOS Release 12.4T
OL-8003-09 Rev. Z0
  Resolved Caveats—Cisco IOS Release 12.4(20)T1
CSCsu36827
Symptoms: CUE clock does not synch up with the CME using NTP. 
Conditions: When UC500 is configured as NTP master. 
Workaround: Use external NTP server other than UC500. 
CSCsu45608
Symptoms: A zone-based firewall does not allow returned TCP traffic from a VPN tunnel.
Conditions: This symptom is observed when the firewall is configured to inspect TCP traffic to and 
from the VPN tunnel.
Workaround: There is no workaround.
CSCsu47037
Symptoms: A router crashes when an attempt is made to forward a packet out of an Auto-Template 
interface. This occurs because the interface’s MTU is set to 0. The show interface Auto-Template 
command displays an MTU of 0.
Conditions: This symptom is observed when an attempt is made to forward a packet out of an 
Auto-Template interface.
Workaround: Configure a protocol MTU directly on the Auto-Template interface (that is, ip mtu 
XXXX
). 
CSCsu51095
Symptoms: If connected routes are optimized using PfR, there will be a routing loop. 
Conditions: This symptom can occur if for some reason pfr is learning connected routes or if the 
user has configured them.
Workaround: The workaround is to create an oer-map with a prefix-list that contains the prefixes 
with ip addr of the connected routes (next hops). Set the set observe mode in the oer-map.
CSCsu61741
Symptoms: The lsp ping command is missing. 
Conditions: This issue is specific to the Cisco 7301. 
Workaround: There is no workaround.