IEEE 802.1D and 802.1Q

For more information about IEEE 802.1D and IEEE 802.1Q and the 9600 Series IP Telephones, see IEEE 802.1D and 802.1Q and VLAN Considerations. Three bits of the 802.1Q tag are reserved for identifying packet priority to allow any one of eight priorities to be assigned to a specific packet.

• 7: Network management traffic
• 6: Voice traffic with less than 10ms latency
• 5: Voice traffic with less than 100ms latency
• 4: “Controlled-load” traffic for critical data applications
• 3: Traffic meriting “extra-effort” by the network for prompt delivery, for example, executive      e-mail
• 2: Reserved for future use
• 0: The default priority for traffic meriting the “best-effort” for prompt delivery of the network.
• 1: Background traffic such as bulk data transfers and backups

NOTE: Priority 0 is a higher priority than Priority 1.