Technical information
ADC Telecommunications, Inc.
88 CHAPTER 2: CUDA 12000 BASE SYSTEM COMMANDS
cm-filter
Creates a packet filter for upstream or downstream cable modem or CPE traffic. You can
associate multiple filters into a filter group by assigning each filter the same group number.
Use the no cm-filter command to remove a filter. If you do not specify a filter number, the entire
group is deleted.
The arguments are order-sensitive. Specify the arguments in the order listed.
Mode
Any.
Syntax
cm-filter <group-number> <filter-number>
{deny | permit} prot {any | tcp | udp | <number>}
[src <ip-address> <mask>]
[dest <ip-address> <mask>]
[tos <tos-value> <mask>]
[src-port {any | <number>}]
[dest-port {any | <number>}]
[tcp-flag {ack | fin | push | reset | syn | urgent}
tcp-flag-mask {ack | fin | push | reset | syn | urgent}]
no cm-filter <group-number> [<filter-number>]
Arguments
<group-number> Specifies the ID of the filter group to which the filter belongs. Values
range from 0 to 60. You can group filters by group ID.
Note that a value of 0 means that no filtering should be performed.
<filter-number> Specifies the index number for the filter within the group. Values range
from 0 to 40.
{deny | permit} Specifies one of the following values:
■ deny – Drops packets matching the filter criteria.
■ permit – Allows packets matching the filter criteria to pass.