Specifications

1346
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S2
• CSCed91338
Symptoms: An ATM device that is connected to a Cisco 12000 series may cause a communication
failure because of a length mismatch between the ATM adaption layer 5 (AAL5) and the IP data
length.
Conditions: This symptom is observed when an IP frame that is smaller than 46 bytes in length
comes from an Ethernet interface to an interface of an ATM line card (4OC3/ATM-IR-SC) on a
Cisco 12000 series. The router always sets the length in the AAL5 to 54 bytes, as if the IP length is
46 bytes (which is the minimum length of the IP data plus an AAL5 header of 8 bytes).
Workaround: There is no workaround.
• CSCed91389
Symptoms: OAMs are dropped on a Cisco router’s ATM IMA interface that is configured for
AAL5oMPLs, causing directly connected CE routers that have the oam pvc-manage command
enabled to take the PVC down. As a result, the CE routers cannot forward any traffic to the MPLS
core, thereby impacting basic connectivity between CE routers that are interconnected via the MPLS
core. Errors are also see when the debug atm error command is enabled.
Conditions: This symptom is observed on a Cisco 7200 series that runs Cisco IOS
Release 12.0(28)S and that is configured for AAL5oMPLS on an ATM-IMA interface. The
symptom may also occur in other releases.
Workaround: There is no workaround.
• CSCed92733
Symptoms: On a Cisco 10720 router, when the system limit for the number of interfaces is
surpassed, a software traceback is generated, indicating that a VCCI was not allocated. This
traceback does not identify which interface caused the resource failure.
Conditions: The problem is seen when the system limit on interfaces is reached. The most common
scenario on a Cisco 10720 router is when the maximum number of VLANs is surpassed.
Workaround: There is no workaround.
Further Problem Description: The interface for which a VCCI is not allocated is not functional in
PXF. The fix for this problem identifies that a resource allocation has failed and identifies which
interface is affected.
• CSCed93139
Symptoms: Local and remote attachment circuit “Up events” may be ignored.
Conditions: This symptom is observed after a pseudowire virtual circuit is established.
Workaround: There is no workaround.
• CSCed93593
Symptoms: The cisco.mgmt.cns.config-changed event message contains invalid <changeItem>
information.
Example: for: (config)#policy-map TEST2
(config-pmap)#class m_new
(config-pmap-c)#shape peak 8010
(config-pmap-c)#priority
(config-pmap-c)#exit
(config-pmap)#desc TESTTEST
(config-pmap)#exit
The 4th changeItem is: Context: <empty>