Specifications

Release Notes for Cisco IOS Release 12.0 S

78-7130-11 Rev. B0

Caveats

• CSCdp46780

After the primary clock scheduler card (CSC) has been removed, a Cisco OC-48/STM-16

Packet-over-SONET/SDH line card might not recover from being switched to the secondary CSC

card and report error messages.

Workaround: Reload the line card.

• CSCdp47676

Under certain timing conditions on some Versatile Interface Processors (VIPs), 2-port High-Speed

Serial Interfaces (HSSIs) or PA-2T3s might experience abnormal transmit underruns as indicated

by the show interfaces EXEC command. There is no workaround.

• CSCdp52926

Output committed access rate (CAR) might not function properly when running on a non-Versatile

Interface Processor (VIP) interface. Traffic does not pass properly through the output interface that

is enabled with CAR. There is no workaround.

• CSCdp54813

A Cisco 7500 series router will often reload when switching onto an IP tunnel if sending to the

tunnel destination involves Multiprotocol Label Switching (MPLS) label imposition. There is no

workaround.

• CSCdp58615

A Versatile Interface Processor (VIP) might reload after distributed committed access rate (DCAR)

is configured and traffic is present on the VIP interface. The condition returns to normal after the

VIP reloads. There is no workaround.

• CSCdp58675

Received packets that had been padded by the previous hop are corrupted by the Multiprotocol

Label Switching (MPLS) distributed Cisco Express Forwarding (dCEF) label imposition code,

which will result in IP checksum errors at their final destination or at an intermediate hop,

depending on the network configuration.

Workaround: Disable dCEF globally or on a per-VIP interface basis.

• CSCdp64140

Two Cisco 12000 series Gigabit Switch Routers (GSRs) that are connected by a Gigabit Ethernet

(GigE) connection might exhibit “GRP-4-CORRUPT” error messages when one of the routers is

upgraded to Cisco IOS Release 12.0(8)S. There is no workaround.

Wide-Area Networking

• CSCdm56380

When an ATM switch is not configured, a permanent virtual circuit (PVC) or one of the

subinterfaces might be shut down on the other side of the ATM switch, but the Simple Network

Management Protocol (SNMP) agent reflects that the subinterface shows the subinterface as being

UP(AdminStatus and OperStatus). There is no workaround.