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Chapter 2
Cisco CMTS Configuration Commands
You can expect to see a temporary spike in CPU usage after initially giving the no cable arp command,
Tip
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
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
clear arp-cache
cable proxy-arp
OL-1581-08
cable source-verify dhcp
Description
Clears the ARP table on the router.
Activates cable proxy ARP on the cable interface.
command, because the router must send a DHCP LEASEQUERY request
Cisco Broadband Cable Command Reference Guide
cable arp
2-15
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