Specifications

126
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(3)
• CSCdk71062
When using privileged-level commands to allow configuration of a command, the user is unable to
configure specific privilege levels for the keywords of the channel interface subcommand
commands. There is no workaround.
• CSCdk77166
A Cisco router that runs DLSw with FST, Direct, or LLC2(Lite) encapsulations might reload.
Workaround: Use DLSw with TCP encapsulation.
• CSCdk87750
An APPN HPR router might reload or issue a spurious memory access with the following backtrace
elements when an APPN RSRB link is activated:
0x60b1e590:anr_build_srb_map(0x60b1e400)+0x190
0x60aff784:ncl_send_fastswitch_enable(0x60aff704)+0x80
0x60afe458:ncl_populate_anr(0x60afe0f4)+0x364
0x609ca31c:send_populate_anr(0x609c9f24)+0x3f8
There is no workaround.
Interfaces and Bridging
• CSCdk20550
The 10 Mbps full-duplex capability of the Cisco 3600 series NM-1FE-TX in
Cisco IOS Release 11.2 P does not operate properly. The speed toggles between 10 Mbps and 100
Mbps. This affects the connectivity. There is no workaround.
• CSCdk23031
Traffic cannot pass through a bridged interface when the encapsulation type is configured as Frame
Relay (encapsulation frame-relay) and packet-by-packet compression is enabled. If
packet-by-packet compression is not enabled, the problem does not exist. The root cause of this
problem is that compression and decompression are not supported with bridging. (Refer to the
following caveat: CSCdi63268.)
Workaround: An earlier workaround was to disable compression in the source whenever bridging
is enabled. Frame Relay encapsulation with packet-by-packet compression was apparently never
taken care of. The solution is to disable compression whenever bridging is enabled. This can be
accomplished with a check in fr_pbp_comp_decide(). If it is determined that bridging is enabled,
do not set the compression flags.
• CSCdk53401
When you netboot a Cisco 3640 router over the Fast Ethernet port, the Cisco IOS software proceeds
to interactive setup without trying to load configurations from the network. This has been traced to
an autonegotiation race condition where the Fast Ethernet port momentarily appears to be in a down
state. There is no workaround.
• CSCdk60026
A Cisco 2610 router configured with SDLC DLSw+ might not send SNRM to a terminal even
though the status is “SNRMSENT” in the output from the show serial interface command. The
interface shows “Link is UP, Line protocol is UP” despite the DTR being down.
Workaround: Execute the shutdown command followed by the no shutdown command in
configuration mode for the serial interface.