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cable source-verify leasequery-filter downstream
The cable source-verify leasequery-filter downstream command enables DHCP lease query filtering
Note
on all downstreams, but the actual filtering does not begin until the cable source-verify dhcp command
and the no cable arp command are configured on a particular downstream. You can configure these
commands on either the downstream's main interface, or on a subinterface for the downstream. If these
commands are configured on a subinterface, however, the lease query filtering occurs only for cable
modems using that subinterface.
Use the
Tip
requests in the upstream direction.
Examples
The following example shows how to configure the Cisco CMTS router so that it allows a maximum of
10 DHCP lease query requests per SID over each five-second interval on all downstream cable interfaces.
This example also shows the configuration of cable source-verify dhcp and no cable arp commands on
a cable interface, which are required to use this feature.
Router# configure terminal
Router(config)# cable source-verify leasequery-filter downstream 10 5
Router(config)# interface cable 5/1/0
Router(config-if)# cable source-verify dhcp
Router(config-if)# no cable arp
Router(config-if)#
Related Commands
Command
cable arp
cable arp filter
cable source-verify
cable source-verify
leasequery-filter
upstream
show cable
leasequery-filter
Cisco Broadband Cable Command Reference Guide
2-228
cable source-verify leasequery-filter upstream
Description
Activates the cable Address Resolution Protocol (ARP).
Controls the number of ARP requests and replies that can be forwarded over
a cable interface.
Enables verification of IP addresses for cable modems (CMs) and CPE
devices on the upstream.
Controls the number of DHCP lease query messages that are sent for
unknown IP addresses per each service ID (SID) on an upstream.
Displays the number of DHCP lease query messages that have been filtered
for all cable modems or for a particular cable interface.
Chapter 2
Cisco CMTS Configuration Commands
command to filter DHCP LEASEQUERY
OL-1581-08
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