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Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Caveats
Resolved Caveats—Cisco IOS Release 12.0(32)S
Beware: With this workaround, all IPv6 packets will be process-switched on the line card, so make
sure you do not have too much IPv6 traffic, or you will get 100% CPU usage on the line card and
probably other problems.
[3] Enable IPv6 BGP Dampening to limit the memory leak:
...
address-family ipv6
/jointfilesconvert/415844/bgp dampening
...
exit-address-family
Note: The problem was not present in Cisco IOS Release 12.0(30)S.
• CSCei90530
Symptoms: An interface of a clear channel T3/E3 SPA that is installed in a 12000-SIP-400 is in a
down state after you have entered the redundancy force-switchover command.
Conditions: This symptom is observed on a Cisco 12000 series that is configured with two PRPs that
function in RPR+ mode.
Workaround: Enter the shutdown interface configuration command followed by the no shutdown
interface configuration command on the affected interface to bring the interface back up.
• CSCei90536
Symptoms: mVPN packets have corrupted encapsulation headers.
Conditions: This symptom is observed on a Cisco 12000 series that has a channelized ISE ingress
line card when packets are replicates to a VRF interface on the ingress line card, to a VRF interface
on another line card, and to a core interface on a third line card. This symptom occurs only after
some redundancy switchovers.
Workaround: Reload the line card.
• CSCei90588
Symptoms: A bad checksum error, bad LLS TV length error, or both are reported on a router that is
configured for OSPF and BGP. These protocols or other configured protocols may flap during the
errors, and data packets that are sent to the PRP may be lost.
Conditions: These symptoms are observed on a Cisco 12000 series that is configured with a PRP-1
when the following conditions are present:
–
OSPF, BGP, and other control protocols are configured with scaled routes and peers.
–
Congestion occurs on the PRP-1 because control packets are targeted to the PRP-1 or because
other packets are sent to one of the IP addresses of the router and are terminated on the PRP-1.
This situation occurs, for example, when IP ping packets are directed towards one of the
loopback addresses and are terminated on the PRP-1.
Workaround: There is no workaround.
• CSCei91101
Symptoms: Local switching traffic is dropped from the ToFab queue on an egress port of an 2-port
T3/E3 serial shared port adapter (SPA) that is installed in a 2.5G ISE SPA Interface
Processor (12000-SIP-400).
Conditions: This symptom is observed on a Cisco 12000 series that functions as a PE router in an
L2VPN environment.
Workaround: There is no workaround.
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