User's Manual

Menus and Parameters
Manual Revision 1.0
4-55
Since the system supports both layer 2 and layer 3 prioritization, a
frame is routed to the Mid queue if either of the following conditions are
met:
 The precedence in the ToS field is higher than the value of the ToS
Precedence Threshold parameter. This is applicable to both tagged
and untagged frames.
 The VLAN Priority field in a tagged frame is higher than the value of
the VLAN Priority Threshold parameter.
Valid values range from 0 to 7.
The default value is 3.
Show VLAN Parameters
The Show VLAN Parameters option displays the current values of the
VLAN support parameters.
ToS Precedence Threshold
The ToS Precedence Threshold parameter enables defining ToS based
prioritization in accordance with the precedence bits of the ToS field in
the IP header. An IP packet received from the Ethernet port is routed to
the Mid queue if any one of the following conditions is met:
 The precedence in the ToS field is higher than the value of the ToS
Precedence Threshold parameter. This is applicable to both tagged
and untagged frames.
 The VLAN Priority field in a tagged frame (Hybrid or Trunk Link) is
higher than the value of the VLAN Priority Threshold parameter.
All other packets received from the Ethernet port are routed to the Low
queue.
Valid values are 0 to 7.
The default value is 3.