Specifications

156
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(2)
• CSCdk33096
When the SERVICE messages are exchanged with the Routers for ISDN PRI interfaces, if the
B-channels are transitioned from Out-of-service state to In-service state, the B-channel count does
not get updated. This can prevent the router from dialing out or accepting incoming voice/modem
calls. The remote callers get a fast busy signal.
• CSCdk36358
On Cisco 3600 series routers, modems might repeatedly be unable to connect on the B-channel.
The modems do not train up and the calls get disconnected.
• CSCdk37517
DDR with dialer dtr does not reset DTR to a down state after an unsuccessful call attempt.
Unsuccessful in this case means that DDR is triggered, DTR is raised, but the modem/TA attached
to the serial port never connects, so that DCD does not come up.
This can be verified by viewing show dialer to ensure that the dialer state is idle, and then show
interface serial x to check the state of DTR.
• CSCdk39920
When packets are bridged while a VC gets torn down, an incorrect VC value (zero) might be
recorded in the bridge table entry. As a result, packets are dropped. This happens because the VC
value gets set to zero before the subinterface gets brought down. The workaround is removing the
invalid bridge entry by issuing the clear bridge command.
• CSCdk41028
Fast port adapters (for example, FDDI, ATM, POSIP, and FE) on a VIP2 might see some
performance degradation if the fast port adapter is on one VIP2 bay and other bay is empty.
• CSCdk41803
A router using Cisco IOS Release 11.3(5.2) and later, with APPN and ATM configured, might
experience software forced crashes with the following trace:
crashdump
process_suspend
process_may_suspend
cbus_atm_sendcmd
cbus_atm_teardown_vc
atm_remove_vc
atmsig_remove_vc
• CSCdk41903
Frame Relay SVCs might fail on multipoint subinterfaces.
• CSCdk43196
A router leaks memory when both AAA and RADIUS/TACACS+ are configured on the router.
Workaround: Issue the command aaa accounting update periodic value at startup time. Set value
to a large number to avoid lots of periodic update accounting records.
• CSCdk45216
The multilink max-links command does not work for L2F projected interfaces. This also applies
for AAA user profiles which use the “max-links” TACACS+ attribute or Port-Limit and
Ascend-Maximum-Channels RADIUS attributes.
• CSCdk46575
Router might fail when the command show dialer is issued while calls are connecting and
disconnecting.