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Router Security Configuration Guide
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Version 1.0g
§ Full support for the Layer 2 Tunnelling Protocol (L2TP)
§ SNMP version 3 (See Section 4.6)
§ Time-based access lists
§ General availability of ip unicast reverse-path verification [Section 4.4]
IOS 12.0 is available in both LD and GD forms for all supported Cisco router
platforms, and many other Cisco hardware products.
IOS 12.1
The 12.1 release is an incremental step forward from 12.0. While it is expected to
reach GD status, as of late 2000 it was only available at the ED and LD release
levels. Some of the security features to appear in 12.1 so far are listed below.
§ Enhanced IPSec certificate management and AAA integration
§ AAA accounting enhancements
§ Unicast reverse path forwarding security enhancements
§ Initial support for Secure Shell (SSH Version 1) client and server
8.3.3. References
[1] Coulibaly, M.M., Cisco IOS Releases: The Complete Reference, Cisco Press,
2000.
This highly specialized book covers the Cisco IOS release system and release
history in painstaking detail.