Wavetronix Click 342 (lean managed ethernet switch) (CLK-342) - Managed Switches User Guide - Manual (Page 22)

CHAPTER 1 • CLICK 340/341/342 MANAGED SWITCHES 21
Figure 2.7 – Learning Addresses
Prioritization
The switch supports two priority queues for adjusting the internal packet processing se-
quence (traffic classes according to IEEE802.1D). Data telegrams that are received are as-
signed to these classes according to their priority, which is specified in the VLAN/prioriti-
zation tag:
˽ Data packets with values between 0 and 3 in the priority field are low (default) priority.
˽ Data packets with values between 4 and 7 in the priority field are high priority and
transmitted via the switch.
The managed switch processes incoming data packets with regard to prioritization infor-
mation contained in the Ethernet packet (VLAN/prioritization tag). The tag enables the
specification of a priority level from 0 to 7, which the managed switch assigns to one of its
two internal queues. By default upon delivery, the packets with priorities from 0 to 3 are
treated as low-priority packets whereas packets with priorities from 4 to 7 are high-priority
Ethernet packets.