Specifications

1243
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(28)S
Conditions: This symptom is observed after a pseudowire virtual circuit is established.
Workaround: There is no workaround.
• CSCed94042
Symptoms: A transient error may occur on a Cisco 12000 series line card during a network routing
change. here is a chance that other line cards in the system will stop transmitting or receiving routing
protocol updates and traffic, causing traffic to be blackholed.
Conditions: This symptom is observed in an MPLS-VPN network. A list of the affected releases can
be found at http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCeb58214.
Cisco IOS software releases that are not listed in the “First Fixed-in Version” field at this location
are not affected.
Workaround: Enter the microcode reload command on any line card that stops receiving traffic or
routing protocol adjacencies from its neighbors.
• CSCee00516
Symptoms: An echo reply source address may be set incorrectly as 0.0.0.0 when responding to an
echo request received on an unnumbered interface. Some line cards may check for the 0.0.0.0 source
address condition and discard the packet based on that condition.
Conditions: This symptom is observed during an LSP ping/traceroute. The symptom is platform
independent.
Workaround: Avoid using numbered interfaces. If this is not an option, there is no workaround.
• CSCee01223
Symptoms: An external trigger may not cause a switchover from a working to a protect line card.
The Rx K1/K2 values in the output of the show aps command are always 0x00/0x00.
Conditions: This symptom is observed when two Cisco 10000 series routers are configured for
MR-APS, with one router containing the working/active line card and the other router containing
the protect/inactive line card. If the ADM that connects the working and the protect line cards
initiates “FORCE/MANUAL” switchover, the active line card does not switch over to the protect
line card.
Workaround: There is no workaround.
• CSCee01698
Symptoms: An Engine 4+ line card may corrupt MPLS packets, causing the packets to be dropped
by the ingress line card of the next-hop router.
Conditions: This occurs only with MPLS traffic. IP traffic works fine.
Workaround: There is no workaround.
• CSCee02510
Symptoms: High CPU utilization may occur on a Cisco 12000 series line cards due to the CEF
scanner process.
Conditions: This problem is seen when a large number of VPN routes are present on the router.
Workaround: There is no workaround. However, the symptom does not seem to affect the
convergence time or performance of the router.
• CSCee02683
Symptoms: When you run Field Diagnostics and the router attempts to access the file through the
LCI infrastructure, the entire router locks up. No commands or CLI responses are possible.
Conditions: This symptom is observed on a Cisco 12000 series that runs Cisco IOS Release 12.0 S.