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762
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Caveats
Resolved Caveats—Cisco IOS Release 12.0(31)S4
Workaround: To prevent the symptom from occurring, remove the allow-self ping keyword before
you load the Cisco IOS software image. When the symptom has occurred, reconfigure each interface
that lost the uRPF configuration and ensure that the allow-self ping keyword is not part of a
command.
CSCsd11701
Symptoms: When multicast hardware acceleration is enabled, a wrong label stack may be imposed
on packets that have an IP destination address below 16.x.x.x. This situation occurs, for example,
when the IP destination address is 10.1.1.1 and when the ingress interface is an MPLS VPN VRF
subinterface that is configured for 802.1q. Note that in this situation, the CEF forwarding
information is correct, that is, it has the correct label stack.
Conditions: This symptom is observed on a Cisco 12000 series that is configured with a 3-port GRE
Engine 2 line card but may occur on any Engine 2 line card that has VRF interfaces. The symptom
occurs only when multicast hardware acceleration is enabled.
A list of the affected releases can be found at
http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCei01644. Cisco IOS
software releases that are not listed in the “First Fixed-in Version” field at this location are not
affected.
Workaround: There is no workaround.
CSCsd18361
Symptoms: On a subinterface of a 4-port Gigabit Ethernet ISE line card (4GE-SFP-LC) that has an
LDP neighborship with a neighbor that uses per-interface label space, when the LDP neighborship
goes down, the subinterface stops forward traffic.
Conditions: This symptom is observed on a Cisco 12000 series. The symptom does not occur with
a 3-port Gigabit Ethernet line card (3GE-GBIC-SC).
Workaround: There is no workaround.
CSCsd23362
Symptoms: When MLP interfaces on a 1-port channelized OC-12/STM-4 (DS1/E1) ISE line card
are configured for MVPN and you reload the router, the PIM VRF neighbor may not be established
via a tunnel for some MLP interfaces.
Conditions: This symptom is observed on a Cisco 12000 series that runs Cisco IOS
Release 12.0(30)S4.
Workaround: Enter the shutdown interface configuration command followed by the no shutdown
interface configuration command on the affected MLP interfaces.
CSCsd24601
Symptoms: The FIB becomes disabled when you bring down a member link of an MLP or MFR
bundle.
Conditions: This symptom is observed on a Cisco 7500 series that is configured with an MLP or
MFR bundle and that runs Cisco IOS Release 12.0(30)S, Release 12.0(31)S, or Release 12.0(32)S,
all of which integrate the fix for caveat CSCeg57219. Other Cisco IOS software releases that
integrate the fix for caveat CSCeg57219 are not affected.
Workaround: There is no workaround.
CSCsd28415
Symptoms: When only one T1 link in a MLP bundle is active while all other links are shut down,
the bundle does not pass traffic unless you bring up at least one more T1 link in the bundle.
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