Cisco Cisco IOS Software Release 12.4(4)T
308
Caveats for Cisco IOS Release 12.4T
OL-8003-09 Rev. Z0
Resolved Caveats—Cisco IOS Release 12.4(22)T1
qffsydbd6ar01#deb control-pl
qffsydbd6ar01#sh log
Control Plane:marking in pak exception [non cef linktype IP]
Conditions: This occurs after upgrading to Cisco IOS Release 12.4(20)T2.
Workaround: There is no workaround.
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CSCsz74859
Symptoms: NHRP cache entry is not getting created for certain spoke nodes.
Conditions: This symptom occurs when two spokes A and B advertise the same subnet with varying
masks (anything other than /8 or /16 or /24). A third spoke upon receiving such routes (from the
hub), in order to send traffic to such subnets, can form a dynamic tunnel with either A or B but not
both at the same time.
masks (anything other than /8 or /16 or /24). A third spoke upon receiving such routes (from the
hub), in order to send traffic to such subnets, can form a dynamic tunnel with either A or B but not
both at the same time.
Workaround: There is no workaround.
Further problem description: There is no hindrance to traffic since it continues to flow via the hub.
When tunnel with spoke A is formed, there is no problem with traffic to subnet behind spoke A. But,
traffic to subnet behind spoke B takes the spoke A - hub - spokeB path. This can be easily noted by
traceroute.
When tunnel with spoke A is formed, there is no problem with traffic to subnet behind spoke A. But,
traffic to subnet behind spoke B takes the spoke A - hub - spokeB path. This can be easily noted by
traceroute.
•
CSCsz79001
Symptoms: A Cisco 87x router may hang or crash after displaying “Now reloading” during
ROMmon upgrade when using the upgrade rom-monitor file flash: command.
ROMmon upgrade when using the upgrade rom-monitor file flash: command.
Conditions: This occurs when a router running ROMmon release 12.3(8r)YI4 or an older ROMmon
from alternate space is upgraded to YI5 or a newer ROMmon version
from alternate space is upgraded to YI5 or a newer ROMmon version
Workaround: Powercycle the router to recover from this hang state. The router will then boot with
the upgraded ROMmon.
the upgraded ROMmon.
•
CSCsz92463
Symptoms: GetVPN Key Servers no longer function in cooperative mode. The Key Servers (KSs)
will fail to communicate with each other, and each will assume it is the primary. GMs registering to
different KSs will not be able to communicate with GMs registered to a different KS.
will fail to communicate with each other, and each will assume it is the primary. GMs registering to
different KSs will not be able to communicate with GMs registered to a different KS.
Conditions: This symptom occurs when using GetVPN Key Servers in cooperative mode.
Workaround: There is no workaround.
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CSCsz92924
Symptoms: CPU HOG in Crypto ACL is seen on the GM. The GM may crash some milliseconds
later after printing the hog.
later after printing the hog.
Conditions: This symptom is observed on a large ACL on the KS (greater than 70 lines) with or
without large ACL locally on the GM.
without large ACL locally on the GM.
Workaround: Limit the ACL length drastically.
Resolved Caveats—Cisco IOS Release 12.4(22)T1
Cisco IOS Release 12.4(22)T1 is a rebuild release for Cisco IOS Release 12.4(22)T. The caveats in this
section are resolved in Cisco IOS Release 12.4(22)T1 but may be open in previous Cisco IOS releases.
section are resolved in Cisco IOS Release 12.4(22)T1 but may be open in previous Cisco IOS releases.