Chapter 26 BWM (Bandwidth Management)
USG20(W)-VPN Series User’s Guide
408
802.1P Marking
Use 802.1P to prioritize outgoing traffic from a VLAN interface. The Priority Code is a 3-bit field
within a 802.1Q VLAN tag that’s used to prioritize associated outgoing VLAN traffic. "0" is the lowest
priority level and "7" is the highest.
The following table is a guide to types of traffic for the priority code.
To access this screen, go to the Configuration > Bandwidth Management screen (see Section
26.2 on page 405), and click either the Add icon or an Edit icon.
Figure 283 Configuration > Bandwidth Management > Edit (For the Default Policy)
Table 156 Single Tagged 802.1Q Frame Format
DA SA TPID Priority VID Len/Etype Data FCS IEEE 802.1Q
customer
tagged frame
Table 157 802.1Q Frame
DA Destination Address Priority 802.1p Priority
SA Source Address Len/Etype Length and type of Ethernet frame
TPID Tag Protocol IDentifier Data Frame data
VID VLAN ID FCS Frame Check Sequence
Table 158 Priority Code and Types of Traffic
PRIORITY TRAFFIC TYPES
0 (lowest) Background
1 Best Effort
2 Excellent Effort
3 Critical Applications
4 Video, less than 100 ms latency and jitter
5 Voice, less than 10 ms latency and jitter
6 Internetwork Control
7 (highest) Network Control
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