Cisco SR2016T-NA Reference Manual page 155

Chapter 2 Cisco CMTS Configuration Commands
cable logging badipsource
To log error messages about bad IP source addresses on the cable interfaces to a separate log buffer, use
the cable logging badipsource command in global configuration mode. To turn off the logging function
and clear out the buffer, so that any error messages are logged to the console or current system log, use
the no form of this command.
Syntax Description buffer-size
Defaults Error messages for bad IP source addresses are logged to the console or current system log, if defined.
If logged is enabled, without specifying a specific buffer size, the default size is 4096 bytes (4 KB).
Command Modes Global configuration
Command History Release
12.1(13)EC
12.2(11)CY
12.2(11)BC2
12.2(15)BC1,
12.2(15)CX
Usage Guidelines The
on the cable interface have been properly assigned by the provider's DHCP servers. When a bad IP
address is detected, the Cisco CMTS generates a BADIPSOURCE error message in the console logs.
In previous Cisco IOS releases, the Cisco CMTS generated these particular error messages for every IP
packet that contained a bad IP source address. This can create a large volume of error messages that can
make it difficult to see other error messages in the console logs.
OL-1581-08
cable logging badipsource [buffer-size]
no cable logging badipsource
Modification
This command was introduced for the Cisco uBR7100 series and
Cisco uBR7200 series universal broadband routers.
Support was added for the Cisco uBR10012 universal broadband router.
Support was added to the Release 12.2 BC train for the Cisco uBR7100
series, Cisco uBR7200 series, and Cisco uBR10012 routers.
The maximum buffer size was adjusted to 1 MB, which can contain
approximately 2000 error messages. Also, if the requested amount of
memory is not available in a contiguous block, the CMTS displays an error
message and does not change the buffer size.
cable source-verify command enables service providers to verify that the IP addresses being used
Specifies the total size of the buffer that will contain the logged error
messages. The valid range is 4096 to 1048576 bytes (4 KB to 1 MB),
with a default value of 4096 bytes.
The maximum buffer size is limited by the amount of actual
Note
unused memory that is available on the Cisco CMTS.
Cisco Broadband Cable Command Reference Guide
cable logging badipsource
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