Specifications

1396
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S
Conditions: These symptoms are observed only when the router reloads but the symptoms do not
occur with every reload.
Workaround: Perform the following steps: 1. Put the port into diagnostic serial loopback. 2. Remove
the diagnostic serial loopback.
For example:
conf t
int atm7/0/0
loopback diagnostic serial
end
conf t
int atm7/0/0
no loopback diagnostic serial
end
• CSCec22252
Symptoms: A Cisco 7500 series may reload when one of the physical multilink member interfaces
is shut down while traffic passes through the interface of the multilink member.
Conditions: This symptom is observed on a Cisco 7500 series and is specific to configuring tag
switching (and not VPN routing/forwarding [VRF] forwarding) on a multilink interface that is based
on Versatile Interface Processor (VIP) channels or serial interfaces in the distributed mode (for
example, the symptom may occur only if a P-provider edge [PE] link is implemented over the
multilink interface).
Workaround: Shut down the Multilink PPP (MLP) interface first, and then shut down the MLP
physical subinterface as needed.
• CSCec24986
Symptoms: Parallel Express Forwarding (PXF) stops and then reloads if you issue a ping
immediately after a policy map attaches to an interface.
Conditions: This symptom is observed if you apply quality of service (QoS) policy maps on the
input Gigabit Ethernet (GE) line card, and output ATM interface of a Multiprotocol Label Switching
(MPLS) provider edge (PE) router.
Workaround: Delay a few seconds after you attach the policy map to the interface before you issue
the ping.
• CSCec25317
Symptoms: A Versatile Interface Processor 4 (VIP4) in which an 8-port multichannel E1, G.703 120
ohm interface port adapter (PA-MC-8E1/120) is installed may reload unexpectedly and display the
following error message:
%ALIGN-1-FATAL: Illegal access to a low address.
Conditions: This symptom is observed on a Cisco 7500 series that has a distributed multilink
interface on which IP Header Compression (IPHC) is configured when distributed Cisco Express
Forwarding (dCEF) is disabled by entering the no ip cef distributed) global configuration command
and reconfigured by entering the ip cef distributed global configuration command while the
interface is operational.
Workaround: Ensure that the multilink interface is shut down before you to disable dCEF.