Chapter 35: Class Of Service Commands; Priority Commands (Layer 2); Table 35-1 Priority Commands; Table 35-2 Priority Commands (Layer 2) - SMC Networks TigerStack II SMC8926EM Management Manual

Chapter 35: Class of Service Commands

The commands described in this section allow you to specify which data packets
have greater precedence when traffic is buffered in the switch due to congestion.
This switch supports CoS with eight priority queues for each port. Data packets in a
port's high-priority queue will be transmitted before those in the lower-priority
queues. You can set the default priority for each interface, the relative weight of each
queue, and the mapping of frame priority tags to the switch's priority queues.
Command Groups
Priority (Layer 2)
Priority (Layer 3 and 4)

Priority Commands (Layer 2)

This section describes commands used to configure Layer 2 traffic priority on the
switch.
Command
queue mode
switchport priority default
queue bandwidth
queue cos-map
show queue mode
show queue bandwidth
show queue cos-map
show interfaces switchport Displays the administrative and operational status of an

Table 35-1 Priority Commands

Function
Configures default priority for untagged frames, sets queue weights,
and maps class of service tags to hardware queues
Sets the default priority processing method (CoS, IP Precedence or
DSCP); and maps TCP ports, IP precedence tags, or IP DSCP tags to
class of service values

Table 35-2 Priority Commands (Layer 2)

Function
Sets the queue mode to strict priority or Weighted
Round-Robin (WRR)
Sets a port priority for incoming untagged frames
Assigns round-robin weights to the priority queues
Assigns class-of-service values to the priority queues
Shows the current queue mode
Shows round-robin weights assigned to the priority queues
Shows the class-of-service map
interface
Page
35-1
35-7
Mode Page
GC 35-2
IC 35-3
IC 35-4
IC 35-4
PE 35-5
PE 35-6
PE 35-6
PE 27-11
35-1