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cable arp filter
cable arp filter
To control the number of Address Resolution Protocol (ARP) packets that are allowable for each Service
ID (SID) on a cable interface, use the cable arp command in cable interface configuration mode. To stop
the filtering of ARP broadcasts for CMs, use the no form of this command.
Syntax Description
reply-accept number
window-size
request-send number
window-size
Defaults
ARP packets are not filtered, which means the Cisco CMTS router accepts all ARP reply packets and
sends all ARP request packets.
Cisco Broadband Cable Command Reference Guide
2-16
cable arp filter {reply-accept number window-size | request-send number window-size}
no cable arp filter {reply-accept | request-send}
default cable arp filter {reply-accept | request-send}
Configures the cable interface to accept only the specified number of ARP
reply packets every window-size seconds for each active Service ID (SID) on
that interface. The cable interface drops ARP reply packets for a SID that
would exceed this number.
•
•
Note
Configures the cable interface to send only the specified number of ARP
request packets every window-size seconds for each active SID on that
interface. The cable interface drops ARP requests for a SID that would
exceed this number.
•
•
Note
number = Number of ARP reply packets that is allowed for each SID
within the window time period. The allowable range is 0 to 20 packets,
with a default of 4 packets. If number is 0, the cable interface drops all
ARP reply packets.
window-size = Size of the window time period, in seconds, in which to
monitor ARP replies. The valid range is 1 to 5 seconds, with a default of
2 seconds.
Cisco IOS Release 12.3(9a)BC introduces enhanced command
option syntax for the cable arp filter command, where number and
window-size values are optional for reply-accept and request-send
settings.
number = Number of ARP request packets that is allowed for each SID
within the window time period. The allowable range is 0 to 20 packets,
with a default of 4 packets. If number is 0, the cable interface does not
send any ARP request packets.
window-size = Size of the window time period, in seconds, in which to
monitor ARP requests. The valid range is 1 to 5 seconds, with a default
of 2 seconds.
Cisco IOS Release 12.3(9a)BC introduces enhanced command
option syntax for the cable arp filter command, where number and
window-size values are optional for reply-accept and request-send
settings.
Chapter 2
Cisco CMTS Configuration Commands
OL-1581-08
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