Cisco Cisco IOS Software Release 12.4(23)
511
Caveats for Cisco IOS Release 12.4
OL-7656-15 Rev. J0
Resolved Caveats—Cisco IOS Release 12.4(8a)
Conditions: This symptom is observed on a Cisco router when the preserve-port keyword is not
configured in the ip nat service command and occurs whether or not NAT Overload is configured.
configured in the ip nat service command and occurs whether or not NAT Overload is configured.
Workaround: There is no workaround.
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CSCse04220
Symptoms: The BGP table version remains stuck at 1 following the issue of the clear bgp ipv4 uni
* command for IPv4 or the clear bgp ipv6 uni * command for IPv6.
* command for IPv4 or the clear bgp ipv6 uni * command for IPv6.
Issuing the clear bgp ipv4 uni * or clear bgp ipv6 uni * commands may also result in a crash.
Conditions: This symptom occurs when issuing the clear bgp ipv4 uni * or clear bgp ipv6 uni *
commands.
commands.
Workaround: Using the clear ip bgp * command clears the sessions, and the BGP table is purged.
The clear ip bgp * command will also avoid crashing the router.
The clear ip bgp * command will also avoid crashing the router.
ISO CLNS
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CSCuk60585
Symptoms: A router that is configured for redistribution into ISO-IGRP may crash.
Conditions: This symptom is observed when the configuration is nvgened.
Workaround: There is no workaround.
Miscellaneous
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CSCeg03885
This caveat consists of two symptoms, two conditions, and two workarounds, and only refers to
routers that are configured with MPLS TE tunnels:
routers that are configured with MPLS TE tunnels:
Symptom 1: Momentary packet loss may occur during tunnel reoptimization, usually several times
between the creation of a new tunnel and the cleanup of the old tunnel. Sometimes, longer packet
loss may occur during tunnel reoptimization.
between the creation of a new tunnel and the cleanup of the old tunnel. Sometimes, longer packet
loss may occur during tunnel reoptimization.
Condition 1: This symptom is observed on any MPLS TE tunnel when the reoptimized label
switched path (LSP) traverses a midpoint or headend router that runs Cisco IOS Release 12.0(25)S4.
switched path (LSP) traverses a midpoint or headend router that runs Cisco IOS Release 12.0(25)S4.
Workaround 1: There is no workaround.
Symptom 2: Permanent bad labels may be present after MPLS TE tunnel reoptimization.
Condition 2: This symptom is observed on a router that runs a Cisco IOS image that does not include
the fix for CSCed21063 and that functions in a network in which some routers run Cisco IOS
Release 12.0(25)S4. With the exception of Release 12.0(25)S4 itself, Cisco IOS software releases
that are listed in the “First Fixed-in Version” field at the following location are not affected:
the fix for CSCed21063 and that functions in a network in which some routers run Cisco IOS
Release 12.0(25)S4. With the exception of Release 12.0(25)S4 itself, Cisco IOS software releases
that are listed in the “First Fixed-in Version” field at the following location are not affected:
.
Workaround 2: There is no workaround. To recover from the symptoms, enter the shutdown
interface configuration command followed by the no shutdown interface configuration command
on the affected TE tunnel interface.
interface configuration command followed by the no shutdown interface configuration command
on the affected TE tunnel interface.
•
CSCei84353
Symptoms: A router crashes when you remove an Embedded Event Manager (EEM) applet.