etc/iproute2/rt_dsfield

   1 #0x10   lowdelay
   2 #0x08   throughput
   3 #0x04   reliability
   4
   5 # This value overlap with ECT, do not use it!
   6 #0x02   mincost
   7
   8 # These values seems do not want to die, Cisco likes them by a strange reason.
   9 #0x20   priority
  10 #0x40   immediate
  11 #0x60   flash
  12 #0x80   flash-override
  13 #0xa0   critical
  14 #0xc0   internet
  15 #0xe0   network