Cisco Cisco IOS Software Release 12.2(4)YA
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Release Notes for Cisco 800 and SOHO 90 Series Routers for Cisco IOS Release 12.3(8)YA
New and Changed Information
New Software Features in Cisco IOS Release 12.2(4)YA1
There are no new software features in Cisco IOS Release 12.2(4)YA1.
New Software Features in Release 12.2(4)YA
The following sections describe the new software features supported by the Cisco 800 and SOHO 90
series routers for Release 12.2(4)YA.
series routers for Release 12.2(4)YA.
Dynamic DNS Support for Cisco IOS
The Dynamic DNS Support for Cisco IOS feature enables Cisco IOS devices to perform Dynamic
Domain Name System (DDNS) updates to ensure that an IP host DNS name is correctly associated with
its IP address.
Domain Name System (DDNS) updates to ensure that an IP host DNS name is correctly associated with
its IP address.
It provides two mechanisms to generate or perform DDNS: the IETF standard as defined by RFC 2136,
and a generic HTTP using various DNS services. With this feature, you can define a list of host names
and IP addresses that will receive updates, specify an update method, and specify a configuration for
DHCP triggered updates.
and a generic HTTP using various DNS services. With this feature, you can define a list of host names
and IP addresses that will receive updates, specify an update method, and specify a configuration for
DHCP triggered updates.
With the Dynamic DNS Support feature, you can define a list of hostnames and/or IP addresses that will
receive updates, can specify an update method, and can specify a configuration for DHCP-triggered
updates.
receive updates, can specify an update method, and can specify a configuration for DHCP-triggered
updates.
For more details about the Dynamic DNS Support for Cisco IOS feature, see the following URL:
No Service Password Recovery
The No Service Password-Recovery feature is a security enhancement that prevents anyone with access
to a console from accessing the router configuration and clearing the password. It also prevents anyone
from changing the configuration register values and accessing non-volatile RAM (NVRAM).
to a console from accessing the router configuration and clearing the password. It also prevents anyone
from changing the configuration register values and accessing non-volatile RAM (NVRAM).
The No Service Password Recovery feature is enabled using the no service password-recovery hidden
command. When this hidden command is used, a warning and a confirmation prompt appear on your
router.
command. When this hidden command is used, a warning and a confirmation prompt appear on your
router.
To disable the feature, use the service password-recovery command.
The No Service Password Recovery feature also recovers the forgotten passwords. When this feature is
enabled, the router accepts the break signal within 5 seconds, just after the Cisco IOS software is
decompressed during booting. The user is then prompted to confirm the action. After confirmation, the
startup configuration is erased, the password recovery procedure is enabled, and the router boots with
the factory default configuration. When the user enters “no”, the router boots normally and with the No
Service Password Recovery feature enabled.
enabled, the router accepts the break signal within 5 seconds, just after the Cisco IOS software is
decompressed during booting. The user is then prompted to confirm the action. After confirmation, the
startup configuration is erased, the password recovery procedure is enabled, and the router boots with
the factory default configuration. When the user enters “no”, the router boots normally and with the No
Service Password Recovery feature enabled.
For more details about the No Service Password Recovery feature, see the following URL:
The No Service Password Recovery feature requires use of ROMMON version 12.2(11r)YV1. The
procedure for upgrading the ROMMON image from ROMMON mode is given at the following URL:
procedure for upgrading the ROMMON image from ROMMON mode is given at the following URL: