Datasheet

125
Release Notes for Cisco IOS Release 12.1E on the Catalyst 6500 and Cisco 7600 Supervisor Engine and MSFC
OL-2310-11
Caveats
With a tunnel configured to use an ATM interface, one end of the tunnel cannot ping the other end
until you bring either end of the tunnel interface down and up. This problem is resolved in
Release 12.1(27b)E1. (CSCse40423)
Cisco IOS BGP is implemented with limits of 255 standard communities and 128 extended
communities. RFC1771 Border Gateway Protocol 4 (BGP4) specifies that these communities should
not be limited. This problem is resolved in Release 12.1(27b)E1. (CSCee30718)
An “Unexpected Exception” and a reload might occur when you remove a switching module. This
problem is resolved in Release 12.1(27b)E1. (CSCse55489)
Resolved General Caveats in Release 12.1(27b)E
Symptoms: Router may generate and/or forward crafted IP packets with the source IP address being
the routers tunnel interface for GRE or mGRE tunnels. Incorrect packet decoding may be seen with
“debug tunnel.
Conditions: The router needs to receive a specially crafted GRE packet sent to the tunnel end-point.
The outer IP packet must come from the configured tunnel source and be sent to the configured
tunnel destination IP address Present Routed bit must be set to 1.
Workaround: Upgrade Cisco IOS to a version containing fixes for: CSCuk27655 or CSCea22552 or
CSCei62762.
Further information: On the 6th September 2006, Phenoelit Group posted an advisory:
Cisco Systems IOS GRE decapsulation fault
Cisco’s statement and further information are available on the Cisco public website at:
http://www.cisco.com/warp/public/707/cisco-sr-20060906-gre.shtml
This problem is resolved in Release 12.1(27b)E. (CSCei62762)
The v2-single-tcp keyword for the dlsw remote-peer command is not supported. Refer to this
publication for more information about the keyword:
http://www.cisco.com/en/US/tech/tk331/tk336/technologies_tech_note09186a0080093db6.shtml
This problem is resolved in Release 12.1(27b)E. (CSCeb47150)
The OSPF adjacencies in an area might reset if you enter the area X stub OSPF command or the
area Y nssa OSPF command when the area X stub OSPF command or the area Y nssa OSPF
command is already configured or if you enter a copy startup-config running-config command.
This problem is resolved in Release 12.1(27b)E. (CSCec30212)
Passwords and other sensitive information should not be sent to Access Control Server (ACS) logs.
When command accounting is enabled, the full text of each command is sent to an ACS server. This
information is sent to the server encrypted, but the server decrypts the packets and logs these
commands in plain text. This problem is resolved in Release 12.1(27b)E. (CSCed09685)
With a Supervisor Engine 720, you might see software-forced reloads. This problem is resolved in
Release 12.1(27b)E. (CSCed36177)
In releases where caveat CSCef46191 is resolved, attempts to open a Telnet connection may result
in a “No Free TTYs” message even though many TTYs are available. This problem occurs after
simultaneous Telnet requests. This problem is resolved in Release 12.1(27b)E. (CSCeg15044)
If you enter the ip forward-protocol turbo-flood command, UDP broadcasts are not forwarded
correctly on interfaces where bridge groups are configured. This problem is resolved in
Release 12.1(27b)E. (CSCeg65640)