
683
Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8
OL-10394-05 Rev. R0
• CSCek57749
Symptoms: Execution of the show version or show hardware commands during traffic may result
in packet drops.
Conditions: This symptom occurs when executing the show version or show hardware commands.
Workaround: There is no workaround.
Further Problem description: Disabling NETIO interrupts/executing interrupt handlings of higher
priority than NETIO interrupts have always been a source of packet drops on Cisco 7200 (as is the
case with other uni-processor systems, for example CSCed10454). The drops usually occur due to
lack of descriptors.
The show version and its constituent functions make use functions which are implemented as
exceptions, which are user generated exceptions of higher priority than any interrupts.
• CSCek64889
Symptoms: Current family of channelized SPAs will not recognize compressed MLP header and will
send such packets arriving on line to host for processing.
Conditions: Occurs when the remote end is Nortel equipment, which use the compressed MLP
header format
Workaround: There is no workaround.
• CSCek75931
Symptoms: A Cisco 10000 series router may experience a CPUHOG condition.
Conditions: This condition is observed when there is an increase of more than 2000 sessions
established.
Workaround: There is no workaround.
• CSCek78031
Symptoms: Some BGP routes are missing from RIB so packets cannot reach the destination.
Conditions: A connected route covers the BGP route in question, but the connected route is less
specific than some other route that is also in the RIB. It leads to BGP to have some prefixes’
nexthops inaccessible, and those prefixes are not installed in to RIB, therefore traffic is stopped.
Workaround: There is no workaround.
• CSCek78050
Symptom: Router console hangs.
Conditions: dir bootflash: command is entered after loading an onboard failure logging (OBFL)
enabled image for the first time.
Workaround: Reload the router to clear the issue.
• CSCek78237
Symptoms: A short CPU hog seen in the ATM PA Helper process when an interface flaps and the
framing configuration is modified on the interface.
Conditions: This symptom is observed on a Cisco 7200 with a PA-A3-T3 adapter that is running
Cisco IOS Release 12.2(25)S or 12.2(31)SB (and possibly other Cisco IOS releases).
Workaround: There is no workaround.
Further Problem Description: The CPU hog is enough to cause OSPF adjacencies (with fast hello)
to go down on other unrelated interfaces. The same problem is seen if BFD is configured.
• CSCek79311
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