I forgot that this file is needed /etc/iproute2/rt_dsfield
# Differentiated field values
# These include the DSCP and unused bits
0x0 default
# Newer RFC2597 values
0x28 AF11
0x30 AF12
0x38 AF13
0x48 AF21
0x50 AF22
0x58 AF23
0x68 AF31
0x70 AF32
0x78 AF33
0x88 AF41
0x90 AF42
0x98 AF43
# Older values RFC2474
0x20 CS1
0x40 CS2
0x60 CS3
0x80 CS4
0xA0 CS5
0xC0 CS6
0xE0 CS7
# RFC 2598
0xB8 EF
This is important to make (--set-dscp-class) work.