Software Guide

Advanced Configuration
Tsunami
®
800 & 8000 Series - Software Management Guide 142
Parameter Description
Rule Name This parameter specifies the Name of the Packet Identification Rule (PIR) and can have a
length of 1-32 characters.
ToS Rule This parameter is used to enable or disable a TOS rule. When ToS rule is enabled, configure
the values for the following to specify the ToS-related configuration:
·
ToS Low
·
ToS High
·
ToS Mask
In ToS Configuration, enter the decimal value of entire ToS 1 byte in “ToS Low” and “ToS
High” parameters of the PIR rule.
Figure 5-66 IP Header Format
ToS Low and ToS High values can be derived from DSCP (6 bits) and ECN (2 bits) values.
ToS Value (8 bits) = DSCP Value (most significant 6 bits) + ECN Value (least significant 2
bits)
Consider the following while configuring PIR TOS parameters:
1. To prioritize traffic based on specific DSCP value, configure the ToS Low and ToS
High to the value derived from that DSCP (as mentioned in the example below)
For Example: To configure ToS Low and Tos High values, when the DSCP packet
value is 10:
- DSCP (6 bit) = 10 (Binary value = 001010)
- ECN (2 bit) = 0 (Binary value = 00)
- ToS (Low and High) (8 bit) = DSCP(001010) + ECN(00) = 40
Configure:
- ToS Low = 40
- ToS High = 40
2. To prioritize the traffic based on range of DSCP value, configure “ToS low” and
“ToS High” to a range.
For Example: To configure ToS Low and ToS High values, when the DSCP packet
is in range of 10 to 20, configure:
- ToS Low = 40 (DSCP = 10 (Binary 001010) + ECN = 0 (Binary 00))
- ToS High = 80 (DSCP = 20 (Binary 010100) + ECN = 0 (Binary 00))