User guide

Important Notes
38
Release Notes for Cisco 2500 Series for Cisco IOS Release 12.0 T
78-5563-07 Rev.H0
• Cisco DistributedDirector
Affected software versions, which are relatively new, are not necessarily available on every device listed
above. If you are not running Cisco IOS software, you are not affected by this problem.
The following Cisco devices are not affected:
• 700 dialup routers (750, 760, and 770 series)
• Catalyst 1900, 2800, 2900, 3000, and 5000 LAN switches are not affected, except for some versions
of the Catalyst 2900XL. However, optional router modules running Cisco IOS software in switch
backplanes, such as the RSM module for the Catalyst 5000 and 5500, are affected.
• WAN switching products in the IGX and BPX lines
• MGX (formerly known as the AXIS shelf)
• Host-based software
• Cisco PIX Firewall
• Cisco LocalDirector
• Cisco Cache Engine
This vulnerability has been assigned Cisco bug ID CSCdk77426.
Solution
Cisco offers free software updates to correct this vulnerability for all affected customers—regardless of
their contract status. However, because this vulnerability information has been disseminated by third
parties, Cisco has released this notice before updates are available for all software versions. Table 7
gives Cisco’s projected fix dates.
Make sure your hardware has adequate RAM to support the new software before installing it. The
amount of RAM is seldom a problem when you upgrade within a major release (say, from 11.2[11]P to
11.2[17]P), but it is often a factor when you upgrade between major releases (say, from 11.2 P to 11.3
T).
Because fixes will be available for all affected releases, this vulnerability will rarely, if ever, require an
upgrade to a new major release. Cisco recommends very careful planning for any upgrade between
major releases. Make certain no known bugs will prevent the new software from working properly in
your environment.
Further upgrade planning assistance is available on Cisco’s World Wide Web site at:
http://www.cisco.com
If you have service contracts you can obtain new software through your regular update channels
(generally through Cisco’s World Wide Web site). You can upgrade to any software release, but you
must remain within the boundaries of the feature sets you have purchased.
If you do not have service contracts, you can upgrade to obtain only the bug fixes; free upgrades are
restricted to the minimum upgrade required to resolve the defects. In general, you will be restricted to
upgrading within a single row of Table 7, except when no upgrade within the same row is available in
a timely manner. Obtain updates by contacting one of the following Cisco Technical Assistance Centers
(TACs):
• [phone] (toll-free from within North America)
• [phone] (toll call from anywhere in the world)
• [e-mail]