Specifications

1304
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S3
• CSCed69546
Symptoms: When mixed channels are defined on a channelized OC-12 line card and these channels
include DS3s, T1s, an DS0s, CEF/RIB inconsistency may occur, preventing traffic to be sent over
the correct interfaces.
Conditions: This symptom is observed on a Cisco 10000 series.
Workaround: When you delete interfaces or subinterfaces on the channelized OC-12 line card,
ensure that the adjacency for the deleted interface is deleted before you configuring a new interface.
This can be checked by entering the show adjacency or show adjacency | include interface name
command. When the adjacency no longer appears in the output of the show adjacency command,
it is safe to add new interfaces.
Note that the show adjacency type number command cannot be used to get the required information.
When deleting large numbers of interfaces, a delay of about 2 minutes should be enough to ensure
that all of the adjacencies have been deleted.
• CSCed69856
Symptoms: A Cisco 10000 series router may crash when access control lists (ACLs) are displayed.
Conditions: The symptom is observed when ACLS are displayed by entering the show access-list
command just after an ACL has been added, deleted or modified. The probability of the crash
increases with the size of the ACL and with the number of times it is used (for example, in route
maps).
Workaround: Wait for a few minutes after modifying the ACL. For large size ACLs (with hundreds
of entries) that is used many times you may have to wait between 5 and 10 minutes.
• CSCed74933
Symptoms: A Cisco 12000 series may exhibit high CPU utilization in the “Per-Second Job” process.
Conditions: This symptom is observed on a Cisco 12012 router that has a GRP and that is running
Cisco IOS Release 12.0(26)S1 with 255 class maps applied to a 4-port ISE Gigabit Ethernet line
card. However, the symptom is release- and platform-independent.
Workaround: Reduce the number of applied class maps.
• CSCed76109
Symptoms: On a Cisco 7500 series that is equipped with Versatile Interface Processors (VIPs) with
ATM port adapters, the ATM PVCs may not come back up after the ATM interface flaps. This occurs
because the interfaces in the VIP do not transmit any packets but still process incoming traffic.
Conditions: This symptom is observed in a dLFIoATM environment in which distributed Class
Based Weighted Fair Queueing (dCBWFQ) is configured on PPPoATM virtual templates.
Workaround: Apply any kind of distributed queueing on any interface or subinterface of the affected
VIP. Doing so triggers all interfaces to start transmitting again, enabling the ATM PVCs to come
back up.
• CSCed79218
Symptoms: A Cisco 7200 series router with a PA-2CT3+ or PA-CT3 port adapter does not provide
the configured minimum bandwidth guarantees.
Conditions: This behavior appears to be limited to the multichannel T3 family of port adapters and
appears consistently upon the configuration of CBWFQ.
Workaround: There is no workaround.