Specifications

115
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(4)
• CSCdk66567
If Token Ring is the endpoint of an encrypted tunnel, extra packets are generated. The symptoms
of this problem are a high CPU load (mainly taken by the Crypto Engine) and false addresses when
enabling the debug tunnel command.
Workaround: Use the tunnel sequence-datagrams interface command on both endpoints of the
tunnel.
• CSCdk69456
The data encryption service adapter (ESA) Crypto engine in a VIP2 is limited to 25 connections.
New connections are establish after a key exchange, but no encryption and traffic flow take place.
This condition occurs in the Cisco 7507 router. There is no workaround.
• CSCdk70139
Committed Access Rate (CAR) is not working for an input list with the access list checking a MAC
address. This is seen on low end platforms (Cisco 2600 series, Cisco 3600 series and Cisco 4500
routers). There is no workaround.
• CSCdk70753
Robbed bit signalling on a Cisco AS5800 access server fails under certain circumstances. This
results in digital signal level 0 (DS0) channels returning busy signals when they are called. The
Cisco AS5800 T3 controller sees ABCD bits of 0000 when the Telco has seized the line with ABCD
bits of 1100. There is no workaround.
• CSCdk72928
On a Cisco 7513 router running Cisco IOS Release 11.1(20)CC with fddi mac-accounting
configured, there is a discrepancy between the CLI output from the
show interface fddi 5/0/0 mac-accounting command, and the snmpwalk output for
“cipMacSwitchedPkts.” The SNMP data is missing all output entries except those destined for
ffff.ffff.ffff. There is no workaround.
• CSCdk76577
When a router is the origin of many routes that pass through tag-switched path (TSP) tunnels, and
dynamic tag-switching is disabled, a watchdog timeout might occur when one of these routes is
deleted.
Workaround: Do not disable dynamic tag-switching, or avoid deleting routes which go through TSP
tunnels (that is, traffic engineering or static routes through TSP tunnels).
• CSCdk78652
The PA-A2 ATM-CES port adapter driver might free twice for aborted TX packets and particles.
This might happen when you change shaping parameters or shut down while active traffic is going
through the port adapter. There is no workaround.
• CSCdk79219
On a Cisco 7200 series router, if you change an interface configuration while there is active traffic
or reset the interface while there is active traffic, the router might reload. This problem occurs with
a PA-A3 hardware revision 2.0 port adapter.
Workaround: Stop the traffic completely before the operation.