Owner manual

Priority Classification Configuration Screen
802.1 Configuration Menu Screens 6-35
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.
Layer 4 (Continued)
UDP Dest Port 4c
UDP Dest Port Range 4d
TCP Source Port 4a
TCP Source Port Range 4b
TCP Dest Port 4c
TCP Dest Port Range 4d
Table 6-9 Classification Precedence (Continued)
Classification Type Precedence Level