Cisco Cisco IOS Software Release 12.2(4)YB

The following sections contain important notes about Cisco IOS Release 12.2(4)YB that can apply to 
the Cisco 1700 series routers. (Also, see the 

.)

The following issues apply to the 1- and 2-Port Analog Modem WIC:

When a Cisco 1700 series router boots up, the default configuration is flowcontrol hardware. 
You can change this configuration if needed.

The 1- and 2-Port Analog Modem WIC is not supported on Cisco 1710 and Cisco 1750 routers.

Cisco 1760 and 1760-V router fans are always on and Cisco 1710 routers do not contain a fan. However, 
the fans in Cisco 1720, 1721, 1750, and 1751 routers stay off until thermally activated.

When using a multipartition flash card, the various flash partitions are referred to as “flash:1:”, 
“flash:2:”, etc. If you specify only “flash” in a multipartition flash, the parser assumes “flash:1:.” For 
example, if you enter show flash all the parser defaults to “show flash:1: all” and only the flash 
information for the first partition displays. To see information for all flash partitions, enter show flash ?. 
This will list all of the valid partitions. Then enter show flash:xx: all on each valid partition.

On Cisco 1700 routers, specify the Peak Cell Rate (PCR) and Sustainable Cell Rate (SCR) as multiples 
of 32 Kbps. Other rates are treated as the next lower value of a multiple of 32. For example, an entered 
PCR value of 150 is considered 128.

Booting a Cisco 1700 series router with the commands boot flash or boot system flash results in 
unpredictable behavior. To work around this problem, be sure to enter a colon (:) following both 
commands (for example, boot flash: or boot system flash:.)

Booting a Cisco 1700 series router using the command boot system tftp might not work due to 
insufficient memory. To work around this problem, use the command tftpdnld from the ROM monitor. 
This error is caveat number CSCdv87983.