Specifications
112
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(4)
• CSCdk79774
Under heavy load conditions, a Cisco 7000 family router with VIP-based PA-4R, PA-4R-FDX, or
PA-4R-DTR Token Ring interfaces may forward packets containing four extra bytes. The four bytes
are appended to the end of the packet. This might adversely affect protocols that are sensitive to
frame lengths (for example, IBM SNA sessions may fail). There is no workaround.
• CSCdk80140
When Multilink is configured over a serial interface, long delays occur with large packets. The
problem is only seen when fair-queueing is configured on the interface.
Workaround: Disable fair-queing.
• CSCdk80653
Frames that are 33 bytes or less are being corrupted when bridged between a FDDI interface and a
PA-A1 in Cisco IOS Release 11.1(19)CC1 or above. The following are workarounds for this
problem:
–
Replace the PA-A1 with a PA-A3.
–
Replace the FDDI interface with another interface type, for example, Token Ring or Ethernet.
–
Downgrade the router to Cisco IOS Release 11.1(18)CC or below.
–
Disable fast switching for transparent bridging.
• CSCdk85960
When ATM subinterfaces belong to a bridge group, and the bridge group is part of a BVI, multicast
packets are not forwarded. There is no workaround.
• CSCdk89313
Currently, there is no NetFlow support for BVI interfaces or any interfaces in a bridge group. There
is no workaround.
• CSCdm08904
The show controllers t3 command on CT3IP did not provide the correct hardware version
information. This is only a display problem. There is no impact on functionality. There is no
workaround.
IP Routing Protocols
• CSCdi84140
IP access lists always permit IP fragments. There is no workaround.
• CSCdk27181
Cisco IOS Network Address Translation (NAT) socket translation only works for connections
initiated from outside to inside. Without sockets, translation works on the IP address. With socket
translation, it does not. The version is c1605-nosy-mz.112-14_P. There is no workaround.
• CSCdk40576
A Cisco router might reload after an upgrade to Cisco IOS Release 11.2(15). There is no
workaround.