Specifications

109
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(4)
• CSCdk93315
Any image which does not include the Layer 2 Forwarding Protocol (L2F) subsystem will reload
when an L2F packet is received. When the system reloads, no crash information is obtained, and
the fault history (obtained by issuing show context) is also often out of date.
Workaround: Check for misconfigured tunnels on the network that might be sending L2F packets
to the router.
• CSCdm01018
If you issue the show buffers command on a Ciscos MC3810 multiservice access concentrator, the
FRF Seg Pool buffers might report numerous “misses.”
Workaround: Move the FRF Seg pool to private pool.
• CSCdm02704
Accounting stop records for connection service should be generated before aaa user_struct is freed.
Appropriate pointer checking is also needed for preventing memory access violation. There is no
workaround.
• CSCdm07937
If you repeatedly executed the write terminal command on a Cisco 12000 Series Gigabit Switch
Router (GSR), the GSR might shut down due to environmental alarms. The env table that is used
to compare measured readings is being corrupted. There is no workaround.
IBM Connectivity
• CSCdk61220
A Token Ring LANE client might not come up immediately when configured on a Cisco 4500 ATM
interface. There is no workaround.
• CSCdk72916
Lexmark printers are contacted by a central server that is sending single route explorer to the
following MAC address: FFFF.FFFF.FFFF. In Cisco IOS Release 11.1, using RSRB without
local-ack, this explorer is passed to the remote Token Ring. With Cisco IOS Release 11.2 and
Release 11.3 this no longer happens.
• CSCdk78156
If you remove source-bridge ring-group xxx, and xxx is not being used under any interface, the
LLC2 session is dropped. There is no workaround.
• CSCdk83457
While doing RSRB local-ack with priority peers, the following error message might appear:
%TCP-2-INVALIDTCPENCAPS:Invalid TCB encaps pointer :
Workaround: Turn off priority peers or turn off local-ack.
• CSCdk84269
Token Ring LAN Emulation Client (TR-LEC) currently processes all registration requests received
on its control distributed virtual circuit. It should only be doing this if the LANE client identifier
(LECID) in the registration message matches up with its own LECID. The LEC finite state machine
(FSM) invokes a_resend_reg_req when a negative reg_rsp is received. Instead, you should invoke
a_process_reg_rsp. There is no workaround.