Specifications

Release Notes for Cisco IOS Release 12.0 S

78-7130-11 Rev. B0

Caveats

• CSCdp34901

Entering the clear ip rtp header-compression EXEC command on a Frame Relay interface that

has data-link connection identifiers (DLCIs) with no compression configured might cause the

router to reload.

Workaround: Do not enter the clear ip rtp header-compression command under these conditions.

• CSCdp42210

A node route processor (NRP) ATM interface stops sending when there are multiple particles with

data-length 0 at the last particle. The only way to exit out of this situation is to use the shutdown

interface configuration command followed by the no shutdown interface configuration command.

There is no workaround.

• CSCdp67380

A Cisco router might reload if the show ip cef EXEC command is entered while the routing table

is changing. There is no workaround.

• CSCdp88625

Under rare circumstances, a permanent virtual circuit (PVC) on a Cisco 6400 series node route

processor (NRP) might stop sending traffic.

Workaround: Use the shut and no shut commands on the subinterface that is carrying the PVC.

Alternate Workaround: Enable ATM traffic shaping.

• CSCdr02061

On the output Versatile Interface Processor (VIP) interfaces of a Cisco 7500/RSP series that is

running Cisco IOS Release 12.0 S, Multiprotocol Label Switching (MPLS) packets are not

classified correctly for Distributed Weighted Random Early Detection (DWRED) and Distributed

Weighted Fair Queueing (DWFQ). In this situation, all MPLS packets will be considered class 0 by

these algorithms regardless of the actual value of their MPLS experimental field values. There is

no workaround.

• CSCdr02641

A TI1575 ATM driver might reload with a bus error due to double freeing buffers. There is no

workaround.

• CSCdr06072

Multicast forwarding might stop for a specific group on the outgoing interface for a given multicast

client if the client is pruned after leaving the group and later joins the group again. This condition

occurs only in Protocol Independent Multicast (PIM) dense mode; PIM sparse mode is not affected.

Workaround: Clear the multicast route for the group for that client by entering the clear ip mroute

{group} command.

• CSCdr07280

Snmpwalk on a Cisco 7500/RSP series router with an ATM interface might cause a CPUHOG

situation and affect router performance. There is no workaround.

• CSCdr23302

When you use Cisco Express Forwarding (CEF), generic routing encapsulation (GRE) tunnels, and

tunnel checksums, the packet loss rate is abnormally high.

Workaround: Disable tunnel checksums or disable CEF on the tunnel interface.