NB1 User Guide YML780 Rev1
44 www.netcomm.com.au
The four TOS bits (the ‘TOS field’) are defined as:
Binary Meaning
1000 Minimize delay (md)
0100 Maximize throughput (mt)
0010 Maximize reliability (mr)
0001 Minimize monetary cost (mmc)
0000 Normal Service
TOS Bits Means Linux Priority Queue Priority Band
0x0 0 Normal Service 0 Best Effort 2
0x2 1 Minimize Monetary Cost 1 Filler 2
0x4 2 Maximize Reliability 0 Best Effort 2
0x6 3 mmc+mr 0 Best Effort 2
0x8 4 Maximize Throughput 2 Bulk 1
0xa 5 mmc+mt 2 Bulk 1
0xc 6 mr+mt 2 Bulk 1
0xe 7 mmc+mr+mt 2 Bulk 1
0x10 8 Minimize Delay 6 Interactive 0
0x12 9 mmc+md 6 Interactive 0
0x14 10 mr+md 6 Interactive 0
0x16 11 mmc+mr+md 6 Interactive 0
0x18 12 mt+md 4 Int. Bulk 1
0x1a 13 mmc+mt+md 4 Int. Bulk 1
0x1c 14 mr+mt+md 4 Int. Bulk 1
0x1e 15 mmc+mr+mt+md 4 Int. Bulk 1
The Default queue priority for non-mapped TOS values is Best Effort.
