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Cisco Broadband Cable Command Reference Guide
OL-1581-08
Chapter 2 Cisco CMTS Configuration Commands
cable arp
Tip
You can expect to see a temporary spike in CPU usage after initially giving the
no cable arp
command,
because of the need to verify CPE IP addresses. CPU usage drops after the router has verified and learned
all of the CPE IP addresses that are currently online. (This same situation occurs after initially enabling
the
cable source-verify
dhcp
command, because the router must send a DHCP LEASEQUERY request
for every unknown CPE IP address.)
Examples
The following example shows how to activate cable ARP requests for port 0 on the cable interface line
card installed in slot 6 of the Cisco CMTS:
router(config)#
interface cable 6/0
router(config-if)#
cable arp
router(config-if)#
The following example shows how to activate cable ARP requests for port 0 on the cable interface line
card installed in slot 6, subinterface 1, of the Cisco CMTS:
router(config)#
interface cable 6/0.1
router(config-subif)#
cable arp
router(config-subif)#
Related Commands
Command
Description
clear arp-cache
Clears the ARP table on the router.
cable proxy-arp
Activates cable proxy ARP on the cable interface.