Specifications

1287
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S4
• CSCef89562
Symptoms: An Engine 4+ EPA-GE/FE-BBRD line card reports “%TX192-3-PAM_MODULE” and
“%TX192-3-PAM_PIM” errors, and the interfaces continue to flap with the following error
message:
%GRPGE-6-INVALID_WORD: Interface GigabitEthernet15/1/0: Detected RX Invalid Word
When there is heavy traffic, the line card may crash without generating any crashinfo.
Conditions: These symptoms are observed on a Cisco 12000 series that runs Cisco IOS
Release 12.0(26)S3 or Release 12.0(27)S3.
Workaround: There is no workaround.
• CSCef90783
Symptoms: The output counter on the interface of a PE router that faces a P router generates almost
twice the value that is should provide.
Conditions: This symptom is observed in the following MPLS topology in which Cisco 12000 series
routers are connected via interfaces of Engine 3 line cards:
A CE router (CE1) connects to a PE router (PE1) that connects, in turn, to a P router. This P router
connects to another PE router (PE2) that, in turn, connects to another CE (CE2) router.
The symptom occurs when a VRF ping is generated from PE1 to the VRF interface of PE2, that is,
the interface that is connected to CE2. The output counter on PE2 generates incorrect values.
Workaround: There is no workaround.
• CSCef91030
Symptoms: After the default route is received from a remote PE for a VRF, communication stops for
traffic via the default route in this VRF on a Cisco 12000 series that functions as a PE router in an
MPLS VPN environment. The packets are switched out of the core MPLS interface untagged as
native IPv4 packets instead of with MPLS and BGP labels.
Conditions: This symptom is observed when the traffic is received from VRF interfaces on an
Engine 2 line card that is installed in a Cisco 12000 series that functions as a PE router.
The symptom occurs in Release 12.0(27)S2, Release 12.0(27)S3, and interim releases for Cisco IOS
Release 12.0(30)S. Other releases may be affected too. The symptom does not occur in
Release 12.0(24)S2.
The symptom occurs when the VRF ingress interface is configured on an Engine 2 3-port GE line
card or Engine 2 1-port OC-48 POS line card. Other line cards may be affected too. The symptom
does not occur when the VRF ingress interface is configured on an Engine 0 4-port OC-3 POS line
card or 4-port GE ISE line card.
Workaround: There is no workaround.
• CSCef91475
Symptoms: A CPUHOG situation may occur intermittently on a Cisco 12000 series, causing fabric
pings to be lost and all OSPF and BGP adjacencies to be dropped.
Conditions: This symptom is observed in PRP on a Cisco 12000 series router.
Workaround: There is no workaround. However, the symptom resolves itself.
• CSCef93832
Symptoms: A router that reboots enters an infinite loop.
Conditions: This symptom is observed after a router has crashed and when the ROMMON does not
gracefully recover during the rebooting process.