Specifications

1062
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(29)S
– In the output of the show hard pxf cpu statistics interface srp 1/1 detail command, the
“destination unreachable” counter increases.
– In the output of the show hard pxf cpu statistics interface srp 1/1 detail command, the “zero
encap length” counter increases.
Conditions: This symptom is observed when all of the following conditions are present:
– A packet enters with or without an MPLS label.
– The router tries to send an ICMP packet to the source in any of the following situations:
* The packet is denied by an output security ACL.
* There is no route in the router to forward the packet.
* The time to live (TTL) of the packet expires.
* The packet is an ICMP echo request packet, and the router tries to send an ICMP echo reply
packet to the source.
– On the interface on which the packet enters, the ip unreachable command is enabled by default.
Workaround: Enter the no ip unreachable command on all interfaces of the router, which works in
the following two cases:
– The packet is denied by an output security ACL.
– There is no route in the router to forward the packet.
For other cases, there is no workaround.
• CSCin24544
Symptoms: A permanent virtual connection (PVC) configuration is removed if a PVC fails when it
is recreated.
Conditions: This symptom is observed on a Cisco 7500 series that has a Versatile Interface Processor
(VIP). The PVC configuration may be removed if the VIP is carrying data traffic and the parameters
of the virtual circuit (VC) class that is attached to the configured PVCs on the associated interface
are modified.
Workaround: There is no workaround.
• CSCin67400
Symptoms: Traffic and pings fail when FRF.12 is configured on a POS link.
Conditions: This symptom is observed on a Cisco router that is configured with a PA-POS-2OC3
port adapter.
Workaround: There is no workaround.
• CSCin72219
Symptoms: If you enter the shutdown command followed by the no shutdown command on an
interface, traffic that congests the interface may cause the router to crash.
Conditions: This symptom is observed when a policy is attached to the interface.
Workaround: There is no workaround.
• CSCin73658
Symptoms: A Cisco 7500 series fails to handle IP packets with a size of 1499 or 1500 bytes if these
packets are received over a PPP Multilink interface.
Conditions: This symptom is observed on a Cisco 7500 series that runs Cisco IOS
Release 12.0(28)S when distributed multilink is configured.
Workaround: There is no workaround.