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cable filter group
cable filter group
To create, configure, and activate a DOCSIS 1.1 filter group that filters packets on the basis of the
TCP/IP and UDP/IP headers, use the cable filter group command in global configuration mode. To
delete a filter group or to reset a particular option to its default value, use the no form of this command.
Syntax Description
group-id
index-num
Specify one of the following options and option-values:
dest-ip ip-address
dest-mask mask
dest-port port-num
ip-proto proto-type
ip-tos tos-mask tos-value
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cable filter group group-id index index-num [option option-value]
no cable filter group group-id index index-num [option option-value]
Specifies a unique group ID for this filter group. The valid range is 1
to 256.
Specifies a unique index for this particular filter. The valid range is 1
to 128.
(Optional) Specifies the destination IP address that should be matched.
The default IP address is 0.0.0.0.
(Optional) Specifies the mask for the destination address that should be
matched. The mask is ANDed with the IP address specified by the
dest-ip option and compared to the result of ANding the mask with the
packet's destination IP address. The filter considers it a match if the
two values are the same.
The default mask of 0.0.0.0 matches all IP addresses.
Note
(Optional) Specifies the TCP/UDP destination port number that should
be matched. The valid range is 0 to 65535. The default value matches
all TCP/UDP port numbers.
(Optional) Specifies the IP protocol type number that should be
matched. The valid range is 0 to 256, with a default value of 256 that
matches all protocols. Some commonly-used values are:
1 = ICMP, Internet Control Message Protocol.
•
2 = IGMP, Internet Group Management Protocol.
•
•
4 = IP in IP encapsulation.
•
6 = TCP, Transmission Control Protocol.
17 = UDP, User Datagram Protocol.
•
(Optional) Specifies a type of service (TOS) mask and value to be
matched:
tos-mask = 8-bit value expressed in hexadecimal notation. The
•
valid range is 0x00 through 0xFF.
tos-value = 8-bit value expressed in hexadecimal notation. The
•
valid range is 0x00 through 0xFF.
The tos-mask is ANDed with the tos-value and compared to the result
of ANDing the tos-mask with the packet's actual TOS value. The filter
considers it a match if the two values are the same.
The default values for both parameters matches all ToS values.
Note
Chapter 2
Cisco CMTS Configuration Commands
OL-1581-08
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