Cisco RSP2 - Route Switch Processor 2 Installation And Configuration Manual page 25

HSA Implementation Methods
Common HSA uses are as follows:
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You can also use HSA for advanced implementations. For example, you can configure the RSP2 cards
with the following:
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Other, more complex uses of HSA are also possible, but are not addressed in this document. For more
Note
information, contact your Cisco service representative.
HSA System Requirements
To configure HSA operation with the RSP2, you must have:
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The HSA feature works with two RSP2s, or with one RSP2 and one RSP4/4+. The RSP2 cannot be
Caution
used in combination with the RSP1, RSP8 or RSP16 when utilizing the HSA feature.
Configuring HSA Operation Task List
Before you configure HSA, decide how you intend to use HSA, as described in the
Implementation Methods" section on page
software error protection? If you are using new or experimental Cisco IOS software, consider using the
software error protection method; otherwise, use the simple hardware backup method.
After determining how you intend to use HSA, complete the tasks in the following sections. The first
two and last two tasks are required for both implementations. The third and fourth tasks relate to simple
hardware backup. The fifth task relates to software error protection only.
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OL-4923-01 B0
Hardware backup—Protects against an RSP2 card failure. You configure both RSP2 cards with the
same software image and configuration information, and you configure the router to automatically
synchronize configuration information on both cards when changes occur.
Software error protection—Protects against critical Cisco IOS software errors in a particular release.
You configure the RSP2 cards with different software images, but with the same configuration
information.
Similar software versions, but different configuration files
Different software images and different configuration files
Widely varied configuration files (for example, various features or interfaces can be turned off or on
per card)
A Cisco 7507 and Cisco 7513 router containing one RSP active processor card, one RSP standby
processor card, and the proper Cisco IOS release (refer to the Software Advisor at
http://www.cisco.com/cgi-bin/Support/CompNav/Index.pl
A standby RSP with the same (or higher) DRAM and Flash memory capacity as the active RSP. See
the "Memory Requirements" section on page 12
A standby RSP with the same boot image, the same ROM monitor, and the same DRAM
configuration as the active RSP. (See the
Specifying the Default Standby RSP2, page 26
for additional information).
for RSP2 memory component requirements.
"Hardware Prerequisites" section on page
25. Do you want it for simple hardware backup or for
(both implementations)
13.)
"HSA
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