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Table 6-9 Classification Precedence (Continued)
Classification Type
Layer 4 (Continued)
UDP Dest Port
UDP Dest Port Range
TCP Source Port
TCP Source Port Range
TCP Dest Port
TCP Dest Port Range
The following example shows how the precedence concept can be applied:
Example
A network administrator has defined the following two classifications involving priorities:
•
All frames with an IP TOS value of AA (Layer 3, precedence level 5a) are assigned to priority 7.
•
All frames with a TCP source port number of 80 (Layer 4, precedence level 4a) are assigned to
priority 3.
In this example, a frame that is received with a TOS value of AA, and a TCP port number of 80,
will be assigned to priority 3. This is because the TCP port number classifications take precedence
over IP TOS classifications.
The key thing to remember is that the switch module will classify frames based on one of the
classification options.
Priority Classification Configuration Screen
Precedence Level
802.1 Configuration Menu Screens
4c
4d
4a
4b
4c
4d
6-35
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