Cisco SR2016T-NA Reference Manual page 234

cable source-verify
cable source-verify
To enable verification of IP addresses for CMs and CPE devices on the upstream, use the cable source-
verify command in cable interface or subinterface configuration mode. To disable verification, use the
no form of this command.
Syntax Description dhcp
leasetimer value
Defaults Disabled. When the dhcp option is specified, the leasetimer option defaults to 60 minutes.
Command Modes
Cable interface and subinterface configuration
Command History Release
11.3 XA
12.0(7)T
12.0(10)SC, 12.1(2)EC Support was added for these trains.
12.1(3a)EC
12.1(13)EC,
12.2(11)BC1
12.2(15)BC1
Cisco Broadband Cable Command Reference Guide
2-222
cable source-verify [dhcp | leasetimer value]
no cable source-verify
Configuring the cable source-verify command on the master interface of a bundle will
Note
configure it for all of the slave interfaces in the bundle as well.
Modification
This command was introduced.
The dhcp keyword was added.
Subinterface support was added.
The leasetimer keyword was added.
The verification of CPE devices was changed when using the dhcp keyword.
(Optional) Specifies that queries will be sent to verify unknown source
IP addresses in upstream data packets.
Do not enable the local DHCP server on the Cisco CMTS and
Note
configure local DHCP address pools, using the ip dhcp pool
command, when using this option, because this prevents DHCP
address validation.
(Optional) Specifies the time, in minutes, for how often the router
should check its internal CPE database for IP addresses whose lease
times have expired. The valid range for value is 1 to 240 minutes, with
a default of 60 minutes.
Note The leasetimer option takes effect only when the dhcp option
is also used on an interface. Also, this option is supported only
on the master interface and cannot be configured on
subinterfaces. Configuring it for a master interface
automatically applies it to all subinterfaces.
Chapter 2 Cisco CMTS Configuration Commands
OL-1581-08