Specifications

134
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(3)
• CSCdk85273
A Cisco 7505 router running Cisco IOS Release 11.2(15a)P with encryption “on” reloads when you
perform an SNMP poll of the cieEngineStatusTable (from CISCO-IP-ENCRYPTION-MIB). This
MIB object is queried by CiscoView, and might be queried by other network management tools.
This behavior does not occur when encryption is “off.”
Workaround: Disable SNMP polling by removing all SNMP-server community statements from the
configuration, or ensure that no management station polls for objects in the
CISCO-IP-ENCRYPTION-MIB.
Novell IPX, XNS, and Apollo Domain
• CSCdk70331
If an IPX access list applied to an interface with the access-group command does not exist, and at
some later time an access list by that name or number is created, there is potential that IPX fast
switching might forward packets that should be filtered.
Workaround: When changing an access list, remove and then reapply that access list to that
interface with the ipx access-group command. The cache should then be invalidated and rebuilt
with the new access list rules. Alternatively, make sure the access-list is defined before the access
group is applied to the interface.
• CSCdk75750
Routing IPX between Bridge Relay Functions (BRFs) on an RSM running
Cisco IOS Release 11.3(7)T does not work when IPX route-cache is enabled on the BRF interfaces.
Workaround: Remove ipx route-cache from the BRF interfaces.
Protocol Translation
• CSCdk67626
When you run protocol translation from TCP to X.25, it is possible to see high CPU utilization
while minimal processes are running in the router. However, CPU usage goes down when actual
work is being performed. This can be confirmed by issuing the show process cpu command at the
enable prompt of the router. For example:
Router# show process cpu
This is a cosmetic problem. There is no workaround.
Wide-Area Networking
• CSCdj81263
When IP fast switching is enabled on a Cisco 1600 series router with BRI interfaces, the router
might fail if the ISDN connection is repeatedly brought up and down. For example, this condition
occurs if the clear ip cache command is repeatedly invoked while the connection is being
disconnected. There is no workaround.
• CSCdk07715
According to all available Q.931 specifications, including that for the Northern Telecom Primary
Rate DMS-100 switch, the “NOTIFY” message is only valid for call state 10 (call is active). The
Cisco router was correctly rejecting calls in which this message was received in some other call
state. However, some DMS-100 switches do send the “NOTIFY” message after a “CALL_PROC”