Specifications

148
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(2)
• CSCdk17038
The router reloads when configuring the crypto key and named-key commands. The router boots
up after the reload, but it does not load the configuration from NVRAM even though the
configuration register is set to 0xE002.
• CSCdk19122
The CT1-PA and CE1-PA, when configured with the compress stac command, in a system with a
CSA-PA (hardware compression PA), experiences memory leakage in the pool manager. When
available memory goes down to a low value (less than 1M), the router fails.
There is no real workaround. However, unplug CSA-PA from the system and software compression
will be used instead. There is no memory leak with a CT1-PA and software compression.
On a Cisco 7500 series router, this causes the output to be stuck.
• CSCdk19805
When you Telnet into one router, then from that router to another, and if both Telnet sessions are
encrypted and kerberized, then the second Telnet console might receive garbled characters. The
commands entered in this session take effect on the second router, but their output is illegible.
• CSCdk23648
When multiple KDCs were configured, there was no way to control the timeout such that failover
can occur. This caused common client applications to fail before the next KDC is contacted. There
is no workaround.
To resolve this caveat, the following two commands were added:
kerberos timeout seconds—Communications with the KDC uses this timeout. The range is from
one to ten seconds, and the default is 5 seconds.
kerberos retry retries—Communications with the KDC will retry this many times. The range is
one to five retries, and the default is four retries.
These commands show up in the configuration when not set to their default values.
• CSCdk23751
Attempting to encrypt to a phantom router causes memory leaks.
• CSCdk24418
Sometimes the modemcap defined for a modem might not be applied to the modem before
allocating the modem for a new call.
• CSCdk26869
Various reloads pointing to inspect option of Cisco IOS firewall.
• CSCdk29115
If Bisync is configured (encapsulation bstun command) with ASCII characters (bsc char-set ascii
command) on the first port of a serial WIC (1T, 2T or 2A/S) in WIC slot 0 of a Cisco 2600 series,
only the first character of each frame is received, and the BSTUN tunnel does not get established.
Other encapsulations are not affected, and using the EBCDIC character set with Bisync works
correctly.
Workaround: Use a different serial port: either the second serial port (port 1) on a 2T or 2A/S WIC
in WIC slot 0 or any serial port in WIC slot 1. If you have only one serial WIC, moving it from
WIC slot 0 to WIC slot 1 corrects this problem.