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Cisco Broadband Cable Command Reference Guide
OL-1581-08
Chapter 2 Cisco CMTS Configuration Commands
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.
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
}
Syntax Description
Defaults
ARP packets are not filtered, which means the Cisco CMTS router accepts all ARP reply packets and
sends all ARP request packets.
reply-accept
number
window-size
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.
•
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.
Note
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.
request-send
number
window-size
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.
•
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.
Note
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.
