Specifications

1085
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(28)S4
BGP is only able to converge for a few seconds before new updates arrive, old BGP network entries
are not cleaned up, causing the MP-BGP network entries counter to increase above the real number
of reachable networks.
Workaround: There is no workaround.
• CSCeh35659
Symptoms: When the ip bgp fast-external-fallover permit interface configuration command is
enabled on the main interface of a 4-port Gigabit Ethernet ISE line card and on a subinterface of a
connected BGP neighbor, and when you enter the shutdown interface configuration command on
the main interface, the BGP session that is established on the subinterface remains up for about 150
to 180 seconds before the BGP hold timer causes the session to go down.
Conditions: This symptom is observed on a Cisco 12000 series only in an per-interface fast external
fallover configuration on a 4-port Gigabit Ethernet ISE line card.
Workaround: There is no workaround. Note that the ip 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.
ISO CLNS
• CSCsb07279
Symptoms: When an IPv4 prefix list is used in a redistribution command for the IS-IS router
process, a change in the prefix list is not immediately reflected in the routing tables of a router and
its neighbor. The change may take up to 15 minutes to take effect.
Conditions: This symptom is observed on a Cisco router that runs Cisco IOS Release 12.0(28)S.
Workaround: To have a change take effect immediately, enter the no redistribute route-map
command followed by the redistribute route-map command for the IS-IS router process.