0x00	default
0x10	lowdelay
0x08	throughput
0x04	reliability
# This value overlap with ECT, do not use it!
0x02	mincost
# These values seems do not want to die, Cisco likes them by a strange reason.
0x20	priority
0x40	immediate
0x60	flash
0x80	flash-override
0xa0	critical
0xc0	internet
0xe0	network
# 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