Specifications

1228
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(28)S
router# conf t
Enter configuration commands, one per line. End with CNTL/Z.
router(config)# cont sonet 3/0/0
router(config-controller)# no aug cont
router(config-controller)# no aug controller
router(config-controller)#
Workaround: There is no workaround.
• CSCed51139
Symptoms: A Cisco 12000 series router with an HA configuration (dual RP redundancy) and with
GE line cards which are using channel groups, might not be pingable after a redundancy switchover.
From the interface, the directly connected device can be pinged, but from the same device, the
interface cannot be successfully pinged.
Conditions: The problem is specific to a Cisco 12000 series router that is running Cisco IOS 12.0 S.
The router must have an HA configuration (dual RPs). Also, channel groups must be configured
(note: even if the channel groups are not assigned to a particular Gige interface, the problem can still
occur). Finally, a link flap needs to occur on the channel group interface before the redundancy
switchover is done to bring on the problem.
Workaround: Enter the shut command followed by the no shut command on the interface.
Further Problem Description: The group channel feature is new and was released for the first time
in Cisco IOS Release 12.0(26)S1 so that is where the exposure is.
• CSCed51371
Symptoms: Intermittent packet drops occur when you ping the VRF loopback/interfaces on a PE
router from an attached PE router. The VPN transit traffic intermittent drops occur also on packets
that exceed the MTU size.
Conditions: This symptom is observed on a Cisco 12000 series 3-port GE and 4-port GE line card
that are installed in a Cisco router that functions as a PE router and that is connected to another PE
router via an L2 switch. The problem occurs when a VRF is configured on a subinterface that faces
the L2 switch.
Workaround: Remove the VRF from the subinterface that faces the L2 switch.
• CSCed51610
Symptoms: A Cisco 12000 series Engine 4+ line card is unable to originate ICMP echo reply
packets. ICMP packets transiting the router are correctly transmitted.
Conditions: This symptom occurs when the rate-limit, MQC set, or MQC police command is
configured on the interface in the output direction.
Workaround: There is no workaround.
• CSCed51664
Symptoms: Gigabit Ethernet interfaces on a Network Processing Engine G-1 (NPE-G1) may not
accept packets with long MPLS headers. This situation may decrease the performance of some
network environment such as an Ethernet over MPLS (EoMPLS) environment.
Packets with a size that exceeds the maximum MTU in the output of the show controller
gigabitethernet 0/x command may be dropped.
Conditions: This symptom is observed on a Cisco 7200 series.
Workaround: Increase the MTU at the interface level.