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Cisco uBR10012 Universal Broadband Router Software Configuration Guide
OL-1520-08
Chapter1 Overview of CiscouBR10012 Universal Broadband Router Software
Supported Software Features for the CiscouBR10012 Router
Syntax Description
Cisco IOS Release 12.3(9a)BC also removes a prior caveat with HCCP Protect interfaces. Previously,
in the event of a revert-back HCCP N+1 switchover, manual removal of cable arp filter reply and
cablearpfilter request configurations may have been required afterward on Protect interfaces.
For more information about ARP Filtering, refer to the following document on Cisco.com:
•Cable ARP Filtering
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122limit/122bc/122b
c_15/cblarpfl.htm
Configurable Registration Timeout
The registration timeout value (the T9 timer) is configurable. This configurable timer parameter
describes the elapsed time from a CM's successful completion of Ranging State 2 to its initial
registration request message. During this time, the CM establishes IP connectivity, Time of Day, and
security (optional), and transfers operational parameters from the Trivial File Transfer Protocol (TFTP)
server.
This capability allows you to change the CM registration value (the T9 timer). Use the
registration-timeout command to set or reset the T9 timer.
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 = (Optional) 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. If not specified, this value uses default.
•window-size = (Optional) 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.
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 = (Optional) 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 = (Optional) 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.
Command Description
registration-timeout minutes Sets the T9 timer to the new value (from 2 to 60 minutes).
no cable registration-timeout Resets the T9 timer to its default of 3 minutes.