Activate Proxy ARP Requests
Configuring Cisco uBR7246 Universal Broadband Router Features VC-155

Activate Proxy ARP Requests

To activate proxy ARP for host-to-host communications, use the following command in cable
interface configuration mode:
Validation Tips
To verify if proxy ARP has been activated or deactivated, enter the command more
system:running-config and look for the cable interface configuration information. If proxy ARP
has been activated, it does not appear in this output. If proxy ARP has been deactivated, it appears
in the output as no cable proxy-arp as shown in this command output excerpt:
router# more system:running-config
Building configuration...
Current configuration:
!
interface Cable6/0
ip address 1.1.1.1 255.255.255.0
no keepalive
no cable proxy-arp
cable insertion-interval 150000
cable downstream annex B
cable downstream modulation 64qam
cable downstream interleave-depth 32
cable downstream symbol-rate 5056941
cable upstream 0 frequency 15008000
cable upstream 0 fec
cable upstream 0 scrambler
no cable upstream 0 shutdown
!
Troubleshooting Tips
If you are having trouble, make sure you entered the correct port and modem card slot number when
you activated proxy ARP.
Set Optional IP Parameters
There are additional IP parameters that you can optionally set to enable downstream echoing of
upstream data.
To configure optional IP parameters, perform the following tasks:
•Activate IP Multicast Echo
•Activate IP Broadcast Echo
Note The default values for the commands used in these configuration steps are, in most cases,
adequate to configure the Cisco uBR7246.
Command Purpose
cable proxy-arp Enable proxy ARP on the cable interface.