
OnSite 2800 Series User Manual | 8 • Link scheduler configuration |
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The
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| Table 11. TOS values and their meaning | |
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TOS Value | OnSite Value |
| Meaning |
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1000 | 8 |
| Minimize delay. |
0100 | 4 |
| Maximize throughput. |
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0010 | 2 |
| Maximizes reliability. |
0001 | 1 |
| Minimize monetary costs. |
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0000 | 0 |
| All bits are cleared, normal service, “default TOS”. |
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Historically those bits had distinct meanings but since they were never consistently applied routers will ignore them by default. Nevertheless you can configure your routers to handle specific TOS values and OnSite allows you to inspect the TOS value in the ACL rules and to modify the TOS value with the link scheduler set ip tos command.
Mode: Source
Command | Purpose |
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node(src)[name]#set ip tos value | Defines the |
| selected class or policy name. Standard ToT values are 0, 1, 2, 4, |
| and 8, as given in table 11 on page 106, but any number from 0 to |
| 15 can be configured. |
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Specifying the precedence field
The set ip precedence command specifies the precedence marking applied to packets of the class name. Pre- cedence and DSCP markings cannot be used at the same time.
The
The no form of this command disables precedence marking.
Mode: Source
Command | Purpose |
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node(src)[name]#set ip precedence value | Defines the precedence marking value applied to pack- |
| ets of for the selected class or policy name. The range |
| for value is from 0 to 7, but only values from 0 to 5 |
| should be used. |
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Specifying differentiated services codepoint (DSCP) marking
Differentiated services enhancements to the Internet protocol are intended to enable the handling of “traffic- classes” throughout the Internet. In this context the IP header TOS field is interpreted as something like a
Link scheduler configuration task list | 106 |