Specifications

1218
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(28)S
• CSCed22837
Symptoms: A router may reload unexpectedly when packets are tag switched.
Conditions: This symptom is observed when a Bridge-Group Virtual Interface (BVI) is created after
the router has booted up, when IP packets are received through the BVI, and when these IP packets
are forwarded as Multiprotocol Label Switching (MPLS) packets through another interface.
Workaround: Disable tag switching on the BVI interface by entering the tag-switching ip interface
configuration command followed by the no tag-switching ip interface configuration command.
• CSCed23567
Symptoms: %IPCLC-3-INTRLVL error messages and tracebacks may be seen on an Engine 2
8xOC3 ATM line card. This situation may cause an 85-percent CPU utilization on the line card.
Conditions: This symptom is observed on a Cisco 12000 series that runs the gsr-p-mz image of
Cisco IOS Release 12.0(27)S.
Workaround: There is no workaround.
• CSCed23828
Symptoms: L2 fragmentation does not happen for packets greater than the network Maximum
Transmission Unit (MTU). Packets are dropped.
Conditions: This symptom occurs when distributed Cisco Express Forwarding (dCEF) is enabled on
an RSP.
Workaround: Either turn dCEF off or configure the MTU to be equal to the network MTU on the
customer edge (CE) routers.
• CSCed23900
Symptoms: Features on an ISE-based line card may not work.
Conditions: This symptom is observed when the line card is newly inserted into a Cisco 12000
series. Packet forwarding is not affected.
Workaround: Reload the router.
• CSCed24020
Symptoms: The IP multicast throughput in Cisco IOS Release 12.3(6)T is not as good as in
Release 12.3(4)T.
Conditions: This symptom is observed when more than 130 kpps of traffic is sent. The symptom may
also occur in other releases.
Workaround: There is no workaround.
• CSCed24502
Symptoms: Any Transport over Multiprotocol Label Switching (AToM)/Layer 2 Tunneling Protocol
version 3 (L2TPv3) data packets that are received on a VLAN subinterface may be dropped when
multicast is enabled on any other VLAN subinterface of the same physical interface.
Conditions: This symptom is observed on a Cisco 2600 series and Cisco 3600 series when Xconnect
is configured on yet another VLAN subinterface of the same physical interface. However, the
symptom is platform independent.
Workaround: Disable multicast on the physical interface or on its subinterfaces that have Xconnect
configured. If this is not an option, there is no workaround.
• CSCed24858
Symptoms: Flow control information is not sent to the line card correctly, which causes errors in
flow control issues.