Specifications

88
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(5)
The default priority of the SNMP process was changed (from medium to low) in early releases of
Cisco IOS Release 11.1 to allow the scheduler to service other processes while SNMP is running.
This change makes SNMP interference with normal routing functions rare, because packet
forwarding and routing are medium- or high-level processes. The result is that SNMP relinquishes
the processor if required. Conversely, SNMP uses all of the available processor to complete this
task.
Workaround: Disable routing table walking using an SNMP view statement in the router
configuration. This might hinder the discovery of unnumbered links in the network, as well as
increase the time of discovery.
• CSCdk54312
Online insertion and removal (OIR) on a Cisco 7500 series router running a Cisco IOS Release 12.0
release might cause “OUTPUT STUCK” and “CYBUS COMPLEX RESTARTS” errors. There is
no workaround.
• CSCdk59010
If you use reverse Telnet to a binary Telnet port with RFC-2217 comport extensions, and if you
make multiple successive dialouts from within the context of the single Telnet session, the
Cisco IOS Telnet server prematurely sends a “FIN” to the RFC-2217 client after several outgoing
calls. The Cisco DialOut client sees the following popup window:
Cisco DialOut Utility Received message from Cisco Dialout Port: COM4 Server: COM4 >
172.16.135.12:7001 Return code: 10053 Message: Unexpected Network Error [ OK ]
There is no workaround.
• CSCdk63484
In certain circumstances, the IPX EIGRP topology table and routing table do not show entries for
routes that are showing on other IPX EIGRP neighbors. If you issue the debug ipx eigrp command,
the affected router shows that the updates are being received, but the entries are never added to the
topology table.
Workaround: Enable IPX RIP/SAP to allow all routers to see all IPX routes.
• CSCdk72065
The correct buffer size should be determined before zeroing the buffer. There is no workaround.
• CSCdk75315
In some cases, error messages are generated by RSP routers with VIP cards. The error messages
are generally benign, indicating temporary “out of memory” situations. The memory is then
recovered. There is no workaround
• CSCdk80074
Initializing a Basic Rate Interface (BRI) that is connected to a Siemens HICOM PABX fails. This
leaves the layer 1 status in “ACTIVE_ErrorInd.” There is no workaround.
• CSCdk93431
When authorizing with TACACS+ on an IPX dialup, the access IPX list is not accepted during the
authorization process.
Workaround: Downgrade to Cisco IOS Release 11.3 (5).
• CSCdm02753
A Cisco 7200 series router with a data encryption service adapter (ESA) card might periodically
reload. There is no workaround.