Sierra Wireless WISMO218 User Manual download pdf (Page 15)

WA_DEV_W228_UGD_002 Rev 003 Page 15 of 78

WISMO228 TCP/IP AT Commands

Manual

range: 0-255 (default value: 64)

WIP_NET_OPT_IP_TOS  Default TOS of outgoing parameters

The IP protocol provides a facility for the Internet layer to know about the

various tradeoffs that should be made for a particular packet. This is required

because paths through the Internet vary widely in terms of the quality of service

provided. This facility is defined as the "Type of Service" facility, abbreviated as

the "TOS facility".

The TOS facility is one of the features of the Type of Service octet in the IP

datagram header. The Type of Service octet consists of the following three fields:

0 1 2 3 4 5 6 7

+-----+-----+-----+-----+-----+-----+-----+-----+

| | | |

| PRECEDENCE | TOS | MBZ |

| | | |

+-----+-----+-----+-----+-----+-----+-----+-----+

The first field is "PRECEDENCE". It is intended to denote the importance or

priority of the datagram.

The second field is "TOS" which denotes how the network should maintain the

tradeoffs between throughput, delay, reliability, and cost.

The last field is "MBZ" (Must Be Zero"), is currently unused and is set to 0. The

TOS field can have the following values:

1000 -- minimize delay

0100 -- maximize throughput

0010 -- maximize reliability

0001 -- minimize monetary cost

0000 -- normal service

For more information on this field please refer to RFC1349.

range: 0-255 (default value: 0)

WIP_NET_OPT_IP_FRAG_TIMEO - Time to live in seconds of incomplete

fragments



1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 78 79

No comments

Sierra Wireless WISMO218 User Manual Page 15