Specifications

74
Release Notes for Cisco IOS Release 12.0 S
78-7130-11 Rev. B0
Caveats
• CSCds10029
Removing a service policy from a large number of Frame Relay permanent virtual circuits (PVCs)
might prevent packets from being forwarded out of the entire interface. The commands that lead to
this situation are:
interface s1/00:0
no frame-relay class name
or
map-class frame-relay map-class name
no service-policy {output} policy-map
Workaround: Attach a dummy Class-Based Weighted Fair Queueing (CBWFQ) policy to the
interface, and then remove the policy.
• CSCds11189
Low Latency Queueing (LLQ) and Class-Based Weighted Fair Queueing (CBWFQ) do not function
properly on an ATM subinterface policy after that interface has been brought down and up or if the
link flaps.
Workaround: Apply the service policy under the permanent virtual connection (PVC). In this
situation, the policy functionality is not affected by link flaps.
Alternate Workaround: Reattach the subinterface service policy after the interface or link comes up.
• CSCds12078
A Cisco 7200 series router with a NPE-200 Network Processing Engine and a PA-2FEISL port
adapter might experience spurious memory access while Cisco Express Forwarding (CEF) is
enabled.
Workaround: Disable CEF.
• CSCds13541
Multiprotocol Label Switching (MPLS) Virtual Private Network (VPN) traffic may be dropped in
a Provider core network that has MPLS traffic engineering tunnels configured. This situation occurs
when the dropped traffic follows a path through the core network that traverses a MPLS traffic
engineering tunnel interface on which IP Label Switching has been configured. This situation only
occurs on Cisco routers that are running Cisco IOS Release 12.0 S and acting as MPLS Traffic
Engineering (TE) head end routers that are carrying packets that are already labeled, such as MPLS
VPN traffic.
Workaround: After a traffic engineering tunnel interface comes up on a Provider core router, enter
the following command sequence:
– configure terminal interface tunnel tunnel-number
– no tag-switching ip
– tag-switching ip
• CSCds13547
When Output Rate Limiting is configured on a Versatile Interface Processor (VIP) interface and the
router is reloaded, the Rate Limiting functionality will not be properly enabled, and the Distributed
Committed Access Rate (DCAR) functionality does not take effect.
Workaround: Disable and then reenable the rate-limit interface configuration command.