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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(31)S1
Conditions: This symptom is observed on a Cisco 12000 series in an per-interface fast external
fallover configuration on a 4-port Gigabit Ethernet ISE line card. However, the symptom may also
occur on other platforms that function in a BGP configuration.
Workaround: There is no workaround. Note that the ip /jointfilesconvert/415844/bgp fast-external-fallover permit command
is currently not supported on subinterfaces.
• CSCeh53906
Symptoms: A stale non-bestpath multipath remains in the RIB after the path information changes,
and BGP does not consider the stale path part of the multipath.
Conditions: This symptom is observed on a Cisco router that has the soft-reconfiguration inbound
command enabled and occurs only when the BGP Multipath Loadsharing feature is enabled for three
or more paths, that is, the number-of-paths argument of the maximum-paths number-of-paths
command has a value of three or more.
Workaround: Disable the soft-reconfiguration inbound command for the neighbor sessions for
which the BGP Multipath Loadsharing feature is enabled or reduce the maximum number of paths
for the BGP Multipath Loadsharing feature to two.
• CSCei06089
Symptoms: Conditional advertisement of the default route via a route map does not work when you
enter the neighbor default-originate command.
Conditions: This symptom is observed on a Cisco router that is configured for BGP.
Workaround: Disable the route map entirely. If this is not an option, there is no workaround.
• CSCei25442
Symptoms: The Border Gateway Protocol (BGP) multicast distribution tree (MDT) subaddress
family identifier (SAFI) could send faulty notifications to Protocol Independent Multicast (PIM)
resulting in a corrupted PIM database.
Conditions: This symptom has been observed when the BGP MDT SAFI receives BGP MDT SAFI
rd 2 style updates.
Workaround: There is no workaround.
• CSCei25454
Symptoms: Connectivity loss may occur for MVPNs.
Conditions: This symptom is observed on a Cisco router that runs Cisco IOS Release 12.0(30)S or
a later release when the MVPNs function in a mixed network that has both VPNv4 RD2 prefixes for
MDT updates and IPv4 MDT subaddress family identifier (SAFI) prefixes.
Workaround: There is no workaround.
• CSCei26899
Symptoms: When you reset a BGP peer, some prefixes are missing.
Conditions: This symptom is observed on a Cisco MGX8850 RPM-XF that runs Cisco IOS
Release 12.3(11)T. However, the symptom is platform-independent and may also occur in other
releases.
Workaround: There is no workaround.
• CSCsa87473
Symptoms: A BGP speaker may fail to send all of its prefixes to a neighbor if the neighbor sends a
refresh request to the BGP speaker at the same time that the BGP speaker is generating updates to
the neighbor. This situation causes the neighbor to miss some prefixes from its BGP table.
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