Enterasys SmartSwitch 2200 Management Supplement page 22

VLAN Classification Configuration Screen
Table 2-2 Classification Precedence (Continued)
Classification Type
Layer 4
UDP Port Source
UDP Port Destination
TCP Source Port
TCP Destination Port
IPX Socket Source
IPX Socket Destination
The precedence concept is illustrated in the following example:
Example
A network administrator has defined the following two classifications involving VLANs:
•
All frames with a UDP Port Source number of 55 (Layer 4, precedence level 2a) are assigned to
the Red VLAN.
•
All frames sourced from the 134.141.28.xx subnet (Layer 3, Source IP Address Best Match,
level 1b) are assigned to the Blue VLAN.
In this example, a frame received with a source address of 134.141.28.99 and contains a UDP port
number of 55 will be assigned to the Blue VLAN. This is because of a Layer 3 IP Address rule that
takes precedence over a Layer 4 rule.
The key thing to remember is that the SmartSwitch devices will classify frames based on one of
the classification options.
2-10 Local Management Screens
Precedence Level
2a
2b
2a
2b
2a
2b