Cisco Cisco IOS Software Release 12.2
538
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(7b):
Resolved Caveats—Cisco IOS Release 12.2(7b)
Cisco IOS Release 12.2(7b) is a rebuild release for Cisco IOS Release 12.2(7). The caveats in this section
are resolved in Cisco IOS Release 12.2(7b) but may be open in previous Cisco IOS releases.
are resolved in Cisco IOS Release 12.2(7b) but may be open in previous Cisco IOS releases.
•
CSCdv43014
With Systems Network Architectures Switching Services (SNASw), some downstream physical
units (PU) may be stuck in the reset state and cannot be activated. The show snasw pu EXEC
command or show snasw dlus EXEC command may show that the Dependent Logical Unit
Requestor/Dependent Logical Unit Server (DLUR/DLUS) pipe is in the “Pend Inact” state. Data
Link Control (DLC) traces may also show no activity on this pipe.
units (PU) may be stuck in the reset state and cannot be activated. The show snasw pu EXEC
command or show snasw dlus EXEC command may show that the Dependent Logical Unit
Requestor/Dependent Logical Unit Server (DLUR/DLUS) pipe is in the “Pend Inact” state. Data
Link Control (DLC) traces may also show no activity on this pipe.
Workaround: Restart SNASw.
•
CSCdv60706
Voice quality issues may occur in a Voice over Frame Relay (VoFR) environment if the G.726r32
codec is used with a 32-ms echo cancellation coverage on the voice port. This configuration works
normally in a Voice over IP (VoIP) environment.
codec is used with a 32-ms echo cancellation coverage on the voice port. This configuration works
normally in a Voice over IP (VoIP) environment.
Workaround: Lower the echo cancellation coverage to 16 ms or use another voice codec such as the
G.729r8 or G.711 codec.
G.729r8 or G.711 codec.
•
CSCdv81177
When voice calls are present, a Cisco 7200 router will repeatedly display the following message:
%SYS-3-MGDTIMER: Timer has parent, timer link, timer = 623B6970.
-Process= "CC-API_VCM", ipl= 4, pid= 112:
These messages are harmless and do not affect the call completion or voice quality.
There is no workaround.
•
CSCdv84788
A Versatile Interface Processor (VIP) may reload or record spurious access after class maps are
configured for Frame Relay. There is no workaround.
configured for Frame Relay. There is no workaround.
•
CSCdw16903
On a Cisco router that is running Cisco IOS Release 12.2(7) or an earlier release, when routing
traffic is sent between PRI/ISDN and H.323 Voice over IP (VoIP) network legs, a memory leak may
occur and the router may reload. This condition occurs when the router is handling the passthrough
Q Signaling (QSIG) messages from an ISDN call leg through a VoIP network. The memory leakage
occurs when H.225 connection timeouts are experienced on the VoIP call legs. If this condition is
occurring, a positive value is displayed for the “H.225 establish timeout” statistic when the show
h323 gateway h225 privileged EXEC command is issued. This leak will not occur when normal
voice call traffic is handled.
traffic is sent between PRI/ISDN and H.323 Voice over IP (VoIP) network legs, a memory leak may
occur and the router may reload. This condition occurs when the router is handling the passthrough
Q Signaling (QSIG) messages from an ISDN call leg through a VoIP network. The memory leakage
occurs when H.225 connection timeouts are experienced on the VoIP call legs. If this condition is
occurring, a positive value is displayed for the “H.225 establish timeout” statistic when the show
h323 gateway h225 privileged EXEC command is issued. This leak will not occur when normal
voice call traffic is handled.
The number of timeouts can be reduced and the memory leak can be minimized by increasing the
H.323 connection timeout value. The H.323 connection timeout value can be adjusted by issuing the
voice class h323 tag global configuration command. The adjusted value must subsequently be
associated with the voice dial peers. The default value is 15 seconds and can be increased to a
maximum of 30 seconds. There is no workaround.
H.323 connection timeout value. The H.323 connection timeout value can be adjusted by issuing the
voice class h323 tag global configuration command. The adjusted value must subsequently be
associated with the voice dial peers. The default value is 15 seconds and can be increased to a
maximum of 30 seconds. There is no workaround.
•
CSCdw18697
A Cisco 7200 or 7500 router may pause indefinitely when Network Based Application Recognition
(NBAR) is enabled.
(NBAR) is enabled.
Workaround: Use the ip nbar resources max-age initial-links expand-links global configuration
command.
command.