Arris C4C - Type of Service and Match Action Filtering; TOS Filtering; Precedence Bits

Chapter 17: IP Packet Filters, Subscriber Management
STANDARD Revision 1.0 C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved. 573
Type of Service and Match Action Filtering
IP packet filtering can also be configured based on the:
 Type of Service (TOS)
 Match action
TOS Filtering
The mask is entered against the value of the TOS byte in hexadecimal. The TOS byte is depicted as follows:
0
1
2
3
4
5
6
7
Precedence
D
T
R
Unused
The 0 equates to the Most Significant Bit and the 7 equates to the Least Significant Bit.
Precedence Bits — The three precedence bits have a value from 0 to 7 and are used to indicate the importance of a
datagram. The default is 0. The higher the binary number, the better the TOS as shown in the following table.
Table 76. Precedence Bits
Bits
TOS
111
Network Control
110
Internetwork Control
101
CRITIC/ECP
100
Flash Override
011
Flash
010
Immediate
001
Priority