Table 1-91 Combined Setting Of Pair Switch And Possibility Of Use; Table 1-92 Tos Number Calculation - Hitachi GR2000 Series Configuration Commands
Hitachi gigabit router configuration guide
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Also See for GR2000 Series:
- Installation manual (18 pages) ,
- Installation manual (410 pages)
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When the upper protocol number is undefined or when numbers other than 6(TCP)
or 17(UDP) are defined in the upper protocol number.
Table 1-91 Combined Setting of Pair Switch and Possibility of Use
Combined Setting of Pair
Item
Switch (Note 2)
1
-ip_pair_off
2
-ip_pair
*:
-port_pair_off / -port_pair and -pair_synchronized_off/-pair_synchronized switches are invalidated
when the upper protocol number is undefined or when numbers other than 6(TCP) or 17(UDP) are
defined in the upper protocol number.
The calculation expression for obtaining a TOS value is as follows:
TOS value = precedence (0-7) x 32 ( Delay (0, 1) x 16 ( Throughput (0, 1) x 8 ( Reliability (0, 1) x 4
A calculation example of the TOS value is shown below.
2. The formula to calculate the TOS number is:
Examples of the calculated TOS number are shown below.
Table 1-92 TOS Number Calculation
Precedence
0
1
2
3
4
5
6
7
3. The upper 6 bits of the TOS field are replaced and the lower 2 bits are ignored
even if this parameter is set. Table 1-93 shows the TOS replacing value for
setting value. TOS value of output packet is the one that added TOS value lower 2
bits of output value to TOS replacing value. Replacing of DS field of Diff-serv is
executed by the same condition for TOS replacement.
GR2K-GA-0014
Ver. 07-02
Possibility
of Use
Possible
Possible
Delay
Throughput
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Filtering/QoS Information
Processing
The source and destination IP addresses are
checked without being replaced.
•
Possible
The source and destination IP addresses are
checked in both cases below.
•
When they are not replaced
•
When they are replaced
Reliability
0
0
0
0
0
0
0
0
TOS Number
0
32
64
96
128
160
192
224
1-183
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