Cisco Cisco IOS Software Release 12.2
53
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(28a)
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Symptoms: A description of what is observed when the caveat occurs.
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Conditions: The conditions under which the caveat has been known to occur.
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Workaround: Solutions, if available, to counteract the caveat.
IP Routing Protocols
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CSCeh13489
Symptoms: A router may reset its Border Gateway Protocol (BGP) session.
Conditions: This symptom is observed when a Cisco router that peers with other routers receives an
Autonomous System (AS) path with a length that is equal to or greater than 255.
Autonomous System (AS) path with a length that is equal to or greater than 255.
Workaround: Configure the bgp maxas limit command in such as way that the maximum length of
the AS path is a value below 255. When the router receives an update with an excessive AS path
value, the prefix is rejected and recorded the event in the log.
the AS path is a value below 255. When the router receives an update with an excessive AS path
value, the prefix is rejected and recorded the event in the log.
Miscellaneous
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CSCsb09190
Symptoms: A router misses an entry in its label forwarding table, which is shown in the output of
the show tag-switching forwarding-table EXEC command for the missing entry and in the output
of the show ip cef detail EXEC command for the prefix.
the show tag-switching forwarding-table EXEC command for the missing entry and in the output
of the show ip cef detail EXEC command for the prefix.
Conditions: This symptom is observed on a Cisco router that is configured for Multiprotocol Label
Switching (MPLS) and that learns its routes through iBGP from redundant route reflectors (RRs)
when BGP labeling is not enabled.
Switching (MPLS) and that learns its routes through iBGP from redundant route reflectors (RRs)
when BGP labeling is not enabled.
Workaround: There is no workaround. However, when you enter the clear ip route EXEC command
for the affected prefix, the prefix is reinstalled in the label forwarding table.
for the affected prefix, the prefix is reinstalled in the label forwarding table.
Resolved Caveats—Cisco IOS Release 12.2(28a)
Cisco IOS Release 12.2(28a) is a rebuild release for Cisco IOS Release 12.2(28). The caveats in this
section are resolved in Cisco IOS Release 12.2(28a) but may be open in previous Cisco IOS releases.
section are resolved in Cisco IOS Release 12.2(28a) but may be open in previous Cisco IOS releases.
The following information is provided for each caveat:
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Symptoms: A description of what is observed when the caveat occurs.
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Conditions: The conditions under which the caveat has been known to occur.
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Workaround: Solutions, if available, to counteract the caveat.
Miscellaneous
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CSCsa81379
NetFlow Feature Acceleration has been deprecated and removed from Cisco IOS. The global
command ip flow-cache feature-accelerate will no longer be recognized in any IOS configuration.
command ip flow-cache feature-accelerate will no longer be recognized in any IOS configuration.
If your router configuration does not currently contain the command ip flow-cache
feature-accelerate, this change does not affect you.
feature-accelerate, this change does not affect you.