Hi, in the exemple below it says the range for dscp value 30 with dscp-mask 30 is 33 through 63.
How do you calculate the range for the dscp mask? Do you just add 30 to 33 ?
Example
In the following example, an ACL looks at traffic that is sent from subnet 10.1.1.0 to subnet 20.1.1.0. The ACL also checks for traffic with DSCP 33, and any subsequent DSCP values from 33 through 63, with a mask value of 30. The ACL is set to a class map that is matching this ACL for further QoS operations.
switch# configure terminal
switch(config)# ip access-list acl-01
switch(config-acl)# 10 permit ip 10.1.1.1/24 20.1.1.2/24 dscp 33 dscp-mask 30
switch(config-acl)# exit
switch(config)# class-map type qos match-any class_dscp_mask
switch(config-cmap-qos)# match access-list acl-01
